Yes. The BYD Tracker user guide (PDF, 20 pages) walks through every page with screenshots: signing up and connecting your car, the Overview, trips, charging, statistics, reminders and notifications, settings and your account. You can read it in your browser, download it or print it. The screenshots use a demo car with made-up data.

It reads your car's data from BYD's servers using your BYD app login, then works out your trips, charges, running costs, savings compared with a petrol car, and more. You don't have to type anything in: it happens automatically in the background, even when your phone and computer are off.

BYD cars that show live data (battery, mileage and location) in the BYD app. It was built and tested on an Atto 2. Plug-in hybrids are handled too, including fuel use and fuel costs. If your car signs in and shows a battery level on the dashboard, it works.

No, it runs in your web browser. On an iPhone you can add it to your Home Screen (Safari → Share → Add to Home Screen) so it opens like an app. That's also needed for iPhone notifications.

Ideally a separate BYD account just for BYD Tracker, not the one you use in the BYD app on your phone. BYD only allows one sign-in at a time per account, so sharing it makes your phone app keep logging out (see Troubleshooting). Authorise a second email address for your car in the BYD app, set a password for it, check you can sign in with it, then give that one to BYD Tracker. If that account signs in with a phone number, tick the phone number box when entering it.

Go to Account → Change BYD login and enter the new password. If tracking had paused, press Retry now on the dashboard afterwards.

BYD Tracker is designed and built by a senior IT professional with over 40 years' experience in IT, including leading the IT department of a global charity with over 80,000 users in 122 countries.

It's developed with modern DevOps practice: the code is kept in version control, every release is checked by an automated test suite before it goes live, and every release is deployed by the same scripted, repeatable process, with its own version number and release notes (the number is shown at the top of every page). The database is backed up every week.

To BYD's cloud, not directly to the car. Your BYD has its own mobile data connection and regularly sends its status to BYD's servers: battery, range, odometer, tyres, doors, location and so on. The official BYD app reads from those servers, not from the car itself. BYD Tracker does the same: our servers in London sign in to BYD's cloud with your BYD app login (or a second login you've set up) and ask for the car's latest status and GPS position, every minute while you're driving, every 5 minutes while it's charging and every 15 minutes when it's parked. There's no Bluetooth, no plug-in device and nothing to install in the car, and it's read-only: it never sends commands to your car. It also means new readings depend on your car having a mobile signal: in an underground car park, for example, they arrive once it reconnects.

Every minute while you're driving, every 5 minutes while it's charging, and every 15 minutes when it's parked. At night (23:00 to 06:00) you can check a parked car less often: every 30 minutes, once an hour or once every 2 hours, under Night-time checks on the Account page. The dashboard's Last update card shows when the latest reading arrived.

It's designed not to. Each check asks BYD's cloud for your car's latest status, and BYD fetches it from the car over its mobile connection, so the car's electronics wake briefly. That's the same thing that happens when you open the BYD app. Checking constantly could stop the car going into its deep sleep, which is what some home-made Home Assistant set-ups ran into, so BYD Tracker checks a parked car only every 15 minutes, and backs off further if the car doesn't answer. To give it even more rest, choose fewer Night-time checks on the Account page (down to once every 2 hours between 23:00 and 06:00). Driving, charging and the alerts for an unlocked car or an open door work as normal. The one difference: a trip that starts in the night may show the time of the previous check as its start. For the fewest requests of all, turn on Deep sleep on the Account page: once the car is parked it's left alone for 6 hours at a time, until it's driven or charged. If you're leaving the car for a long time, Pause checking stops BYD Tracker contacting it at all until you resume. If your car ever warns of a low 12V battery, tell us, and turn on deep sleep in the meantime.

Open Settings and choose your Time zone, then save. Times, days, monthly totals, notifications and night-time checking all follow it. Accounts in Australia start on Sydney time and everyone else on UK time until they choose; pick your own state if it's different (for example Perth, Brisbane or Adelaide).

A trip ends once the car has been switched off for 2 minutes, or has stood still for 15 minutes with the power on (in a long queue, say). It's saved with the next reading after that, so it usually appears a few minutes after you park.

When the car is parked it's only checked every 15 minutes, so a drive can be noticed a few minutes after you set off. The distance, energy and cost are still complete, because they come from the odometer and battery readings; only the drawn line may start a little late. The line also joins up readings taken a minute apart, so it can cut corners.

The car's detailed readings (taken once a minute while driving) are what the route is drawn from. To keep storage and costs down they're deleted after a set period (see How long we keep it in the Privacy notice). The trip itself, with its distance, time, energy and cost, is kept, and so are all your totals. Download the GPX from a trip's page if you want to keep a route.

The car sent a reading that can't be right, for example an odometer of zero while it was asleep. These trips are left out of all totals so they don't spoil your figures. You can open one to see the raw readings, and delete it if you like.

Yes. On Charging (called Fuel & charging for a plug-in hybrid) you can add a charge or refuel by hand, or edit one that was detected: for example to set whether it was at home, a public AC charger or a rapid DC charger, or to enter what you actually paid.

Yes. Trips has an export CSV link for spreadsheets, each trip has a GPX download for mapping apps (when location is switched on), and Account → Download my data gives you everything we hold about you in one file.

From the battery energy the trip used, at your home electricity price in Settings, allowing for the energy lost while charging (the charging efficiency setting, typically 0.88–0.93). For plug-in hybrids, fuel used is costed at your fuel price.

Open Settings and check your home electricity price per kWh (from your energy bill or app), your public AC and rapid DC prices, and your battery size. Changing prices affects trips recorded from then on.

What the same distance would have cost in a petrol car with the fuel economy you set in Settings (e.g. 40 mpg, or 7.0 L/100 km) at the petrol price at the time, minus what you actually spent. If you change the comparison car's economy in Settings, every figure is recalculated with the new one, including past trips and months.

Recent efficiency is the car's own figure for its last ~50 km. Your trip figures are measured from battery readings over each trip and include things like heating and short journeys, so they won't match exactly.

Cold weather means energy goes on heating the cabin and the battery, tyres are firmer and cold air is denser, so each kWh takes you less far. Add your postcode in Settings and the Battery page shows your own efficiency at different outside temperatures, using daily readings from the nearest Met Office weather station. Only the first part of the postcode (e.g. SW1A) is kept, and readings are collected from the day you add it.

Yes, it's the Units setting in Settings. Choose Kilometres for km, km/h, L/100 km, cost per km and tyre pressures in bar; or Miles for miles, mph, mpg, cost per mile and psi. Everything is stored in km and shown in whichever you choose, including past trips, and notifications and emails follow the same setting. You can also set your currency symbol (for example €) in Settings.

Yes. On the Claims page, tick each business journey and add where it was from and to and what it was for; the odometer readings and miles come from the car. Choose how you're paid in Claim settings: your own car (HMRC's mileage allowance, 45p a mile for the first 10,000 business miles in the tax year, then 25p), a fully electric company car (HMRC's Advisory Electricity Rate) or a plug-in hybrid company car (HMRC's Advisory Fuel Rate for petrol, by engine size), or your employer's own rate. Each month, or the whole tax year, downloads as an Excel file ready to attach to an expenses claim. With location switched on, places you name are remembered and filled in for later trips. Your employer's expenses policy decides what you can claim.

Android (Chrome, Edge, Firefox or Samsung Internet): open the site, sign in, go to Notifications, tick Phone and browser notifications on this device and tap Allow. You can also add it to your Home screen (Chrome menu ⋮ → Add to Home screen) so it opens like an app.
iPhone: first add the site to your Home Screen (Safari → Share → Add to Home Screen), open it from the Home Screen icon and sign in, then tick Phone and browser notifications on this device and allow them when asked. Apple only allows notifications from sites added to the Home Screen.
Computers (Chrome, Edge, Firefox, Safari) work the same way as Android. Each device you switch on gets every notification.

On Notifications, tick Email notifications, check the Send to address (your account email unless you change it), save, then press Send test email. If it doesn't arrive, check your spam folder.

You choose under Notify me when, grouped as: Battery (reaching 100% or a level you choose while charging, dropping below a level, a reminder to plug in at a time you set, charging starting, and charging stopping before it's finished); Location (arriving near a saved place, leaving one by more than 0.1 miles (160 m), or the car moving overnight between times you set); Tyres (a pressure change of more than an amount you set, or a tyre below 20 psi (1.4 bar), puncture likely); Security (left unlocked for longer than you choose, or a door, the boot, the bonnet or a window left open when parked); and Trips (a summary after each journey, and a weekly or monthly summary by email). Reminders (MOT, insurance and so on), finished charges and problems reaching the car are always notified.

It only fires when the battery actually reaches 100%. If the car's charge limit is set lower (e.g. 80%), it won't. Charging is checked every 5 minutes, so it can arrive a few minutes after the charge finishes.

Tyres warm up on a drive and their pressure rises by 2–4 psi (0.15–0.3 bar), which would set off false alarms. So each tyre is compared with its pressure after the car has been parked for 2 hours or more. A drop is reported straight away, even mid-drive, because warming can only raise the pressure.

Once connected, ABRP plans your journeys from your car's real battery level instead of a figure you type in. It takes about a minute:

1. Set up your car in ABRP. In the ABRP app or at abetterrouteplanner.com, sign in and add your car, choosing the exact model and version of your BYD car. Skip this if it's already there.

2. Press Connect with ABRP. Open Account, find A Better Routeplanner (ABRP) live data and press Connect with ABRP.

3. Sign in to ABRP and allow BYD Tracker. ABRP's own sign-in page opens: sign in and agree to let BYD Tracker see your cars and send them live data. You come straight back to BYD Tracker.

4. Choose your car. If you have one car in ABRP it's picked for you; if you have several, choose which one is this BYD. The card then says Connected, with the car's name.

5. Optional: let ABRP see where the car is. The car's position is only sent if location is switched on (Account → Your data). Without it, ABRP still gets your battery level, speed, odometer, range and charging status.

6. Plan a route in ABRP with that car selected. The starting charge now comes from your car. To update ABRP straight away, press Send test now on the Account page.

Prefer to paste a token? On the ABRP card, open Or paste a token from ABRP instead. In ABRP, open your car's settings → Live data → Custom connection, tap Copy token (a long code like 1a2b3c4d-5e6f-…) and paste it there. Both ways send the same data.

After each reading of your car: battery %, speed, odometer, the car's range estimate, whether it's charging or parked and, only if location is on, its position. That's once a minute while you drive, every 5 minutes while it charges and every 15 minutes when it's parked (every 6 hours with Deep sleep). It goes only to your own ABRP account. Your ABRP password is never seen by BYD Tracker: ABRP gives it a sign-in key, stored encrypted like your BYD login (as is a pasted token). ABRP is included in your subscription.

On the Account page: the ABRP card should say Connected, with the car's name and when data was last sent. If it asks you to sign in again, press Connect with ABRP (this happens if BYD Tracker was disconnected in ABRP, or after a long time without any readings). Press Send test now to send your current battery level.
In ABRP: check the plan uses the same car you chose (use Change car on the Account page if not), and that its starting charge comes from live data rather than a fixed value. ABRP takes about a minute to show new data. If you pasted a token and then made a new one in ABRP, the old one stops working: paste the new one, or use Connect with ABRP instead.

On Account, press Disconnect on the ABRP card. Nothing more is sent to ABRP and BYD Tracker's sign-in key (or your token) is deleted. You can also remove BYD Tracker's access, or the custom connection, in your ABRP account.

Yes. Until 31 December 2026 you can buy a year of BYD Tracker as a Christmas gift for £17 at byd-tracker.uk/christmas26. No account is needed to buy one. Choose whether we email it to them on Christmas morning, or send it to you to print or forward. Either way you get the gift code, a redeem link and a printable gift card straight away, by email too.

Open the link in your gift email or on the card, or go to byd-tracker.uk/gift and enter the code (XMAS-…). Press Redeem my gift, then sign in, or create your account, and connect your BYD car. Your year starts on the day you redeem it and no card is needed. If you already subscribe, your next payment simply moves a year later. Each code can be used once and is valid for 12 months.

If you charge at home with an Ohme charger, BYD Tracker can read it through your own Ohme account. You then get:
• whether it's charging now, on the Overview and the Charging page;
• its smart-charging schedule (the times it plans to charge);
• what each day's charging cost, as the Ohme app shows it;
• the exact kWh and cost of each home charge, measured by the charger, instead of BYD Tracker's estimate from the battery %. Those charges show from Ohme on the Charging page, and your home charging costs, trip costs and battery health use them.
It's read-only: BYD Tracker never starts, stops or changes your charging. It's included in your subscription.

1. Check you have what's needed. An Ohme home charger (tested with the Intelligent Octopus Go tariff), and the email address and password you use to sign in to the Ohme app, with your charger showing in it. Each household connects its own Ohme account.

2. Open Account and find Ohme home charger.

3. Enter your Ohme app email and password and press Connect. BYD Tracker signs in to Ohme once and checks there's a charger on the account; the card then shows your charger's model.

4. Look at the Charging page. The charger's status, schedule and costs appear at the top. Your home charges from the last 7 days are updated from Ohme within the hour, or straight away if you press Update from Ohme now.

Only the car's owner can connect a charger. People you share your car with see the figures but can't connect or change anything.

No. It's used once, to sign in to Ohme, and then thrown away. BYD Tracker keeps only the access token Ohme gives back, encrypted in the same way as your BYD login, and uses it only to read your charger. Disconnecting (or deleting your BYD Tracker account) deletes it. If you change your Ohme password, Ohme may ask for the new one: the Charging page will say so, and you just connect again.

By time, not by date. Ohme reports how much energy it delivered in each hour. Each charge BYD Tracker sees (from when the car started charging to when it stopped) takes the Ohme hours it overlaps, so it doesn't matter which end each side dates it by. When two charges share an hour, that hour is split by the minutes each one was charging. Hours when Ohme delivered energy but the car wasn't seen charging (for example the car warming up while plugged in, or another car on the same charger) are left out.
Smart charging often pauses between cheap slots, so one evening plugged in can show as several charges; each gets its own share, and battery health counts them together as one charge.

A charge keeps BYD Tracker's estimate when:
• Ohme has no energy for those hours (you charged somewhere else, or with a different charger or a 3-pin cable);
• the charge is more than 7 days old, or happened before you connected Ohme (only the last 7 days are matched);
• it ended in the last quarter of an hour (Ohme is given time to report; it's updated at the next hourly check);
• Ohme's figure doesn't fit the battery % the car gained, so the two can't be the same charge.
Charges you entered or edited yourself are never changed.

Ohme measures the energy that came from your home supply, which is what you pay for. Some is lost as heat while charging (typically around 10%), so less reaches the battery. BYD Tracker's estimate works the other way, from the battery % gained. Both are allowed for: costs use what Ohme measured, and battery health takes the charging losses off (your charging efficiency in Settings).

From Ohme, using the tariff set in your Ohme app (including cheaper smart-charging times on a smart tariff), with 5% VAT added because Ohme reports them before VAT. If they look wrong, check the tariff in the Ohme app. If Ohme has no cost for a charge, your home electricity price from Settings is used.

On Account, press Disconnect on the Ohme card. The access token is deleted and nothing more is read from Ohme. Charges already updated keep their Ohme figures (you can edit any of them on the Charging page).

£1.80 a month, or £18 a year (two months free), after a 7-day free trial that needs no card. Payment is by card through Stripe. You can switch between monthly and annual at any time on the Account page.

Not during the free trial: it needs no card. The trial starts when you connect your car and lasts 7 days; a banner shows the days left and we email you before it ends. If you add a card during the trial, the first payment (£1.80, or £18 for an annual plan) is taken when the trial ends, then on the same date each month or year. If you add one after it has ended, it's taken straight away. Without a card, tracking pauses when the trial ends.

During the free trial there's nothing to cancel: if you don't add a card, it simply ends. Once subscribed: Account → Cancel subscription. A monthly plan carries on to the end of the month you've paid for, then stops. An annual plan stops straight away and the unused months are refunded to your card, pro rata. Your history is kept for 4 weeks after that in case you come back; then the account is deleted (see below).

Accounts with no subscription are kept for 4 weeks. After 3 weeks we email you a warning with the date; after 4 weeks the account is permanently deleted: your sign-in, your encrypted BYD login and all your trips, charges, settings and notifications. We email you to confirm. Subscribing again before then keeps everything, and you can use Download my data on the Account page to keep a copy.

Only records held by byd-tracker.uk are deleted. Anything stored on BYD's own cloud (for example by the BYD app) is not affected; that's entirely outside this service.

Account → Manage card and invoices opens Stripe's secure page, where you can update your card and download every invoice.

Stripe tries again over the next few days and tracking carries on meanwhile; a banner asks you to update your card. If the payment still can't be taken, the subscription ends and tracking pauses until you subscribe again.

During the 7-day free trial nothing is charged, so there's nothing to refund. Your subscription begins when you add a card (charged at the end of the trial, or straight away if it has ended). Annual plan: cancel at any time and the unused months are refunded to your card, pro rata (for example, cancelling after 3 months refunds about £13.50). Monthly plan: there's no refund for the rest of that month; the service carries on until the end of the month you've paid for, so the most it can cost you is £1.80. (This doesn't affect your legal right to cancel within 14 days of first signing up, described in the Terms.)

Only you, and anyone you've approved for a shared account (see Sharing with a partner). The administrator can see account details (name, email, phone number, subscription) and can view your records read-only if needed for support; every viewing is logged. No other user can see anything of yours.

It's encrypted with a key held in Google Cloud's key management service and locked to your account, so it can't be used for anyone else's. It's never shown on any page, not even to the administrator, and is only used to read your car's data.

No. To comply with GDPR (data protection by design and by default), location is switched off for every account. BYD Tracker only requests, stores or uses your car's position once you have given express permission yourself, by switching on Show location data in Trip reports on your Account page under Your data. Each account holder decides this individually: nobody else can switch it on for you, and the administrator doesn't switch it on for anyone.

If you share your car with someone, they only see location details if you also switch on Location for that person under People who can see your car, again one person at a time. You can withdraw permission whenever you like by switching it off, and Clear personal location data removes everything already stored.

Only if you choose. Location is off unless you switch on Show location data in Trip reports in Account → Your data. While it's off, the car's position isn't requested or saved: trips show distance, time and cost only, there are no route maps or GPX downloads, and alerts that need a position (arriving at or leaving a saved location) are paused. You can turn it on or off at any time, and Clear personal location data permanently removes every position already stored while keeping your trips and costs.

Note that this only covers BYD Tracker. Your car sends its position to BYD's own cloud service regardless of this setting, and BYD may store it there. That's outside BYD Tracker's control: see the BYD app and BYD's privacy policy for what they keep and any settings they offer.

No. It only reads data. It never unlocks, starts or changes anything on the car.

Your account, your car's records and the weekly backups are stored only on Google Cloud in London: neither the database nor its backups are kept outside the UK. Everything is encrypted where it's stored, and your BYD login is encrypted a second time with its own key (Google Cloud Key Management, also in London) that only BYD Tracker's server can use. BYD Tracker is designed to comply with UK GDPR from the ground up: location is off until you switch it on, you can download or delete your data at any time, and accounts without a subscription are tidied away automatically.

A few services handle specific jobs: Stripe takes card payments (we never see your card number), Brevo sends emails, Apple and Google deliver phone notifications, and map images come from OpenStreetMap, which sees which map area is being viewed but not your trip data. Some of these may process what they need outside the UK; the Privacy notice lists them and the safeguards that apply.

Account → Delete my account. It cancels your subscription straight away and permanently deletes your account, your BYD login and all your records. You might want to Download my data first.

While you have a subscription, for as long as your account is open. If your subscription ends (or you never start one), your account is kept for 4 weeks in case you come back. We email you a warning after 3 weeks with the exact date, then after 4 weeks the account is permanently deleted and we email you to confirm. Subscribing again before then keeps everything. A shared account whose access to a car has ended is treated the same way. Payment records are kept by Stripe for 6 years, as UK tax law requires. Weekly backups are kept for 4 weeks, so deleted records are gone from every backup within 4 weeks.

Yes. A copy of the whole database is taken once a week, kept in London on Google Cloud, and used only to recover from a fault or a mistake. Each backup is deleted automatically after 4 weeks. If an account is deleted, it disappears from every backup within 4 weeks, and if we ever had to restore a backup we would delete again any accounts that had been deleted since it was taken.

No. Deleting a BYD Tracker account, whether you do it yourself, it's tidied away after 4 weeks without a subscription, or the administrator removes it, only deletes the records held by byd-tracker.uk: your sign-in, your encrypted BYD login, and all your trips, charges, settings and notifications. It has no effect on anything stored on BYD's own cloud, which is entirely outside this service. For that, see the BYD app and BYD's privacy policy.

No. BYD Tracker is independent and not made, endorsed or supported by BYD. It connects to BYD's servers in the same way the BYD app does, using your own login.

Yes, with a shared account (a sub-account of yours). Your partner gets their own sign-in and sees your car's records: trips, charges, costs, reminders, notifications and the car's status. It's view only: they can't change anything. They don't need a subscription or a BYD account of their own; it's included in yours.

Location (routes, maps and "arrived" / "left" alerts) is off for each person until you switch it on for them, next to their name under People who can see your car on your Account page. It also needs your own location setting to be on.

1. Ask the administrator to add your partner's email address as a shared account for your car.
2. You'll get a notification. On your Account page, under People who can see your car, press Allow. Nothing is visible to them until you do.
3. Your partner signs up at byd-tracker.uk/join (or signs in with Google) using exactly that email address, enters their name and confirms their email. They won't be asked to connect a car or pay. They'll then see your dashboard, with a banner saying it's your car.

They can't see your BYD login, your account details (phone number and so on) or your billing, and they can't change settings, edit or delete trips and charges, or add other people. Everything they can see is view only.

Yes, on their own phone (iPhone or Android). They sign in, go to Notifications and tick Phone and browser notifications on this device (on an iPhone, after adding the site to the Home Screen and opening it from there; see Notifications). They'll get the same alerts as you. Emails still go to the address in your notification settings.

On your Account page, under People who can see your car, press Remove. It takes effect straight away. The administrator can also remove or delete a shared account. If you delete your own account, all shared access to it ends too.

The car's owner needs to press Allow on their Account page first; they've been sent a notification. If it says your email needs confirming, click the link in the email we sent (check spam), then press Continue. Use Safari or Chrome directly rather than a browser inside another app (like Messenger), as sign-in doesn't work well there.

Not at the moment. Each shared account sees one owner's car. To change whose car it sees, ask the administrator.

Email us (the address is shown here to customers: sign in, or start a free trial). Tell us the email address you sign in to BYD Tracker with, what you were trying to do, and what happened (a screenshot helps). Please don't send your BYD password or card details: we never need them, and won't ask for them. We aim to reply within a few working days.

Because BYD Tracker has been given the same email and password your phone app is using. BYD only allows one sign-in at a time per account, so each time BYD Tracker checks the car, your phone gets signed out (and the other way round). To fix it, authorise a new email account for your car in the BYD app. Set up a password for it and test that you can sign in with it, then enter that email and password on Account → Change BYD login. Your phone app keeps using your usual account. There's a step-by-step guide with screenshots (PDF).

Your BYD password has probably changed, or BYD asked you to sign in again. Tracking pauses so your BYD account isn't locked by repeated attempts. Update the login on Account, then press Retry now on the dashboard. So that changing your BYD password doesn't stop tracking again, you can give BYD Tracker a login of its own: see the guide to setting up a second BYD login (PDF).

Usually BYD's servers are busy or under maintenance, or the car has no mobile signal (an underground car park, for example). It keeps trying automatically and catches up once the car responds; you'll get a notification if it's been out of touch for about 1½ hours.

Moves of less than about 50 metres aren't counted as trips. If the car was out of signal for the whole journey, the distance is still added to your next trip, because it comes from the odometer.

Open the site in Safari (not inside another app's browser), or use email and password instead. If you added it to your Home Screen, open it from there and sign in again.

Check spam or junk for an email about verifying or confirming your email address. To get a new one, press Send the email again on the set-up page: it comes from BYD Tracker. Once you've clicked the link, go back and press Continue.

Email us (the address is shown here to customers: sign in, or start a free trial) and we'll help (see How to get support / contact us above).