Terms of use
wattata for iPhone and Android Automotive OS. Updated November 4, 2026.
These terms apply to the two wattata apps: the companion app on your car’s built-in screen, and the iPhone app. They are published by 9h41 Inc. By installing or using either app, you accept them.
What wattata does
The companion app reads the battery and driving data your car makes available to Android, and hands it to your paired iPhone over Bluetooth. The iPhone app shows it: the live status, your trips, your charges, efficiency and battery health. wattata only reads: it sends the car no commands. There is no account.
wattata is an independent app. It is not affiliated with, endorsed or sponsored by any car maker, by Google or by Apple. Car makes and model names belong to their owners.
Compatible cars
wattata works with electric cars with Google built-in whose screen offers Google Play. What a car makes available depends on its make, its model and its software version, and a car update can change it. We can’t promise that every value is available on every car. The compatible cars page lists the ones we know.
The figures are estimates
Range, energy, efficiency, battery health, charging times and the fleet comparison are computed from what the car reports. They can be wrong or late, and they don’t replace the car’s own displays or a diagnosis by your dealer. Don’t rely on them alone to decide whether you can reach a destination or a charger.
Safe driving
Keep your eyes on the road. Look at the apps only when it is safe and legal to do so, and follow the driving restrictions of your car and your phone.
Subscription
The companion app is free. The iPhone app starts with a free trial when you pair the car and the iPhone, then needs a subscription to keep working.
Subscriptions are sold and billed by Apple through the App Store, and the price is shown before you buy. A subscription renews automatically unless you cancel it at least 24 hours before the end of the current period, in your Apple account settings. Refunds are handled by Apple, under its own terms.
Fair use
Use wattata for your own car, or for a car you are allowed to use. Don’t resell the apps, don’t try to get into our server or disrupt it, and don’t use wattata to follow a person without their consent.
Your data
What the apps read and what reaches our server is described in the privacy policy. You can erase everything at any time: delete your data.
Liability
The apps are provided as they are. To the extent the law allows, 9h41 Inc. is not liable for indirect damages arising from their use, such as a figure that turns out to be wrong, or a trip or a charge that was not recorded.
Nothing in these terms limits the rights that consumer protection law gives you, in Québec or wherever you live.
Changes and applicable law
We may update these terms when the apps change. The date at the top of this page says when they last changed.
These terms are governed by the laws of Québec and the laws of Canada that apply there. If you are a consumer, you keep the protection of the law where you live, and you may go to its courts.