Watt Time stores your Tesla API tokens safely on your watch and encrypted. They can only be accessed by the Watt Time app and are never transmitted to anyone other than the official Tesla API servers. If you wish to use the Remote Start feature Tesla requires your password be transmitted to them in order to enable this. This will require my app to know your Tesla password, again however it's stored encrypted, only accessible by Watt Time app and only ever sent directly to the Tesla API. At any time if you wish to remove your Tesla API tokens you can clear them permanently by opening the Watt Time app, going to "Settings" and pressing the "Clear tokens" button.

Watt Time uses Google's Firebase to monitor the app's analytics and crash history to help me improve the app. Firebase's privacy policy can be found here. No private information will be sent to Firebase, strictly anonymized usage and crash data.