Your data
All records are saved in your app's database on the server. Nothing is kept only on a phone, and the app needs a connection to work.
The Data tab shows what people saved, newest first. Unchanged sample records come from the app itself and are not listed. Deleting a changed sample brings back the original for that person.
Testing
The Simulator acts like one phone. It uses your browser as its device for every app, while sign-in is separate for each app. To test how two people see the app, sign up a second account in the Simulator, or use a second device.
Your App ID
Each app has an ID in the Setup tab. The iOS and Android shells use it to open the same app on a device. It identifies the app; it is not a password or a key.