Privacy Policy - TrueLevel
1) Who we are
TrueLevel is provided by Saifullah Ahad ("we", "us", "our"). Our website/portfolio is: https://saifullah.ai.
2) What this policy covers
TrueLevel is a bubble level and inclinometer that reads the device motion sensors (accelerometer / gravity) to show whether a surface is level and to measure angles in real time. This policy explains what the app handles and what it does not.
3) Information we collect
TrueLevel does not collect, store, transmit, sell, or share personal data. The app has no account system, no user profile, no analytics SDK, no advertising SDK, no crash-reporting SDK, and no third-party tracking.
TrueLevel requests no runtime permissions at all. Android motion sensors (accelerometer / gravity) do not require any permission. The app does not use the microphone, the camera, location, contacts, storage, or any other sensitive permission. Sensor readings are processed only in memory to draw the live level and angle, and are never stored or sent anywhere.
TrueLevel does not request the INTERNET permission, so the app cannot transmit data
from the device. It works entirely offline.
4) Local settings
The app stores one setting locally on your device: the calibration offset you choose with the "set zero" control. This setting is saved only in the app's local storage and is removed when you uninstall the app or clear the app's storage from Android Settings.
5) How we use information
Because TrueLevel does not collect data, there is no server-side use of information. Motion-sensor input is used only on-device to display the level, bubble position, and angle while the app is open.
6) Sharing and disclosure
We do not share personal information because we do not collect any.
TrueLevel does not integrate any analytics, advertising, authentication, cloud, or tracking SDKs.
7) Data retention
We do not retain personal data. The calibration offset remains only in local app storage until you clear app data or uninstall TrueLevel.
8) Your choices and controls
- No permissions to manage: TrueLevel requests no runtime permissions, so there is nothing to allow or revoke.
- Calibration: you can set or reset the "set zero" offset inside the app at any time.
- Reset app data: clearing app storage removes the local calibration offset.
- Uninstall: uninstalling the app removes TrueLevel and its local settings.
9) Accuracy note
TrueLevel provides an estimate from consumer phone motion sensors. It is not a certified or calibrated spirit level, surveying instrument, or safety-critical measuring device. Sensor bias, temperature, and device wear can affect readings; use the "set zero" calibration on a known-flat surface for best results, and do not rely on it for safety-critical work.
10) Children's privacy
TrueLevel is a general utility app and is not directed to children under 13. It does not knowingly collect personal information from anyone, including children.
11) International transfers
TrueLevel does not transfer any data internationally because it does not transmit data.
12) Changes to this policy
We may update this Privacy Policy from time to time. We will post the updated policy at https://privacy.saifullah.ai/truelevel.html and update the effective date above.
13) Contact
If you have questions or requests, contact: Saifullah Ahad
Email: [email protected]
Phone: +8801711134346
Website: https://saifullah.ai
Location: Dhaka, Bangladesh