Terms of service

Version 2026-10-30

These terms are between you and Mark Calleran, trading as Caltechnics ("we") for the BYD Tracker service. We are registered with the Information Commissioner's Office as a data controller, registration number ZC285721.

The service

BYD Tracker reads data about your car from BYD's servers using your BYD app login, and shows your trips, charging, costs and notifications. It is not made, endorsed or supported by BYD. It uses an unofficial connection that BYD could change or block at any time; if that happens the service may stop working until it is fixed, or permanently. Using a third-party service with your BYD login may be against BYD's own terms: that is a matter between you and BYD, and you use it at your own risk. The service only reads data; it never controls the car.

Figures such as costs, efficiency, range and trip distances are estimates. Don't rely on them for safety, legal, tax or insurance purposes. Notifications may be delayed or missed.

Where the data comes from

All the car's data is collected from the car by BYD and stored in BYD's cloud. Applications such as BYD Tracker then read it from there using your BYD login; BYD Tracker never connects to the car itself. We don't control what BYD collects, when the car sends it, or how accurate or complete it is, so we can't be held responsible for any inaccuracies, gaps or delays in that data, or in anything worked out from it (such as trips, costs and notifications).

Price, free trial and payment

• £1.80 a month, or £18 a year paid in advance (both including any VAT that applies), paid by card through Stripe. You can switch between them on the Account page: moving to annual charges the year straight away, less the unused part of the current month; moving to monthly keeps the unused part of the year as credit for your monthly payments.
• New accounts get a 7-day free trial, starting when you connect your car. No card is needed for the trial, and nothing is charged during it. To carry on afterwards you subscribe by adding a card: if you add it during the trial, the first payment is charged when the trial ends; if after, straight away; then every month (or every year) on the same date until you cancel. If you don't subscribe, tracking stops when the trial ends.
• One free trial per person and per car (we remember a coded form of the car's VIN for this).
• If a payment fails we'll retry it for a short time; if it still fails, tracking pauses until it's paid.
• We may change the price with at least 30 days' notice by email; you can cancel before it takes effect.

Gift subscriptions

• A gift is a year of BYD Tracker for someone else, paid once by card through Stripe. The Christmas 2026 gift price is £17, on sale until 31 December 2026.
• The gift code can be used once, by anyone who has it, so keep it safe until you pass it on. It's valid for 12 months from the day it's bought. The year starts on the day it's redeemed, and no card is needed to redeem it.
• If the person redeeming it already subscribes, their next payment moves 12 months later instead; time they've already paid for is kept. Otherwise, when the year ends, tracking stops unless they choose to subscribe (we email them a week before). Nothing is charged automatically.
• A gift that hasn't been redeemed can be refunded in full on request within 14 days of buying it, and after that at our discretion. Once redeemed, it can't be refunded or exchanged for cash. Contact byd-tracker@caltechnics.com.

Cancelling

• Cancel any time on the Account page. Monthly plan: the service continues until the end of the month you've paid for, then stops. Annual plan: the service stops straight away and we refund the unused part of the year to your card, pro rata by day (deleting your account does the same). During the free trial there's nothing to cancel and nothing is charged.
• An account with no subscription for 4 weeks is deleted, after a warning email a week before (see the Privacy notice). This only deletes records held by BYD Tracker, not anything held by BYD.
• Your 14-day right to cancel: by law you may cancel within 14 days of first subscribing. Because the service starts straight away at your request, if you cancel within that time after a payment, we'll refund what you paid less a proportionate amount for the days used. Contact byd-tracker@caltechnics.com.
• We may suspend or close accounts that misuse the service, with a refund of any unused period unless the misuse was serious.

Shared accounts

A subscriber can let other people see their car (view only) at no extra charge. The subscriber chooses who, and whether each person can see location details, and can remove access at any time. A shared account ends when the subscriber removes it or their account closes.

Your responsibilities

Only connect a BYD account you are entitled to use, for a car you own or have permission to track. Don't use the service to track another person without their knowledge and consent: if other people drive the car, tell them it is tracked, especially if you switch location on or share it. Keep your sign-in details safe.

Our responsibility

We'll provide the service with reasonable care and skill. We aren't liable for losses that weren't foreseeable, for business losses, or for anything caused by BYD's systems, the data BYD supplies, or a BYD account being locked. In any case, our total liability to you is strictly limited to the subscription you've paid for the current period (currently £1.80 for a monthly plan, or £18 for an annual plan). Nothing here limits liability that can't legally be limited (such as for death or personal injury caused by negligence, or for fraud), or your statutory rights.

General

You must be 18 or over to use the service. We may update these terms; we'll email you about material changes. These terms are governed by the law of England and Wales. Questions or complaints: byd-tracker@caltechnics.com.