Questions
The bubble never sits at zero.
Phone cases, a warped surface, and sensor variation all shift the reading. Remove a thick case, place the phone on a known level surface, and use the app's zero or calibrate control.
Can I use this for a roof or a foundation?
No. Use the instrument and method that job requires. Level Tool is a rough check.
The reading jumps around.
Hold the phone still against the surface. Sensors pick up small movement. If it still jumps on a steady surface, email us the iPhone model.
How do I contact support?
Email store@aivanaapps.com with Level Tool in the subject, plus the iPhone model and iOS version.
Delete data on this iPhone
Delete the app to remove its local data. Under this policy we do not keep a copy on a server, so there is nothing else for us to erase. Deleting the app does not delete contacts in iCloud or another account, photos in your library, or a subscription billed by Apple.