The Autopilot Mobile App (as of 04/09/21) uses local storage on your phone to store data that you input. It also uses Google Analytics to track events such as how often you use the app and the features within it, but this data is not connected to your identity.
We will also be able able to view some aggregate statistics based on your use of the app that will be made available to use via Apple and Google's app stores. This data will also be anonymized and will only include broad information about your usage, and won't include anything you write in the app.
Given that the data you add to Autopilot Mobile App is (for now) only stored locally on your phone, we do not have access to that data. However, if someone were to gain access to your mobile device, they could theoretically access the data you saved with Autopilot in that way.
In the future, we plan on adding an ability to log in with an account and store your data remotely. If and when we release that feature, your Autopilot user data will be stored on the cloud if you create an account. If you do not create an account, it will continue to only be persisted on your device's local storage.
When you sign up for the Autopilot beta program we will collect your email address, which we will use to contact you about Autopilot updates and beta program feedback requests. We will not share your email with any third party. You can request to be removed from the list at any time.