Privacy Policy

1. Information We Collect

Spirit Level is designed to respect your privacy. The App collects or processes the following categories of information:

• Sensor data (device-only): The App reads data from your device's accelerometer and gyroscope to calculate tilt and angle. This data is processed entirely on your device and is never transmitted to us or any server.
• Photos (optional, device-only): If you choose to attach a photo to a saved measurement, the image is stored locally on your device. Photos are never uploaded to us, and are only shared if you explicitly choose to share or export them.
• Measurement data (device-only): Saved measurements (angles, surface names, notes, timestamps) are stored in a local database on your device using Android Room. This data never leaves your device unless you explicitly export it (as CSV or PDF) using the share feature.
• Advertising identifier & usage data: The App uses Google AdMob to display advertisements. The Google Mobile Ads SDK collects your device's Advertising ID, IP address, and limited app-interaction data for the purpose of serving and measuring ads. This is handled by Google in accordance with the Google Privacy Policy.

2. App Permissions Explained

The App requests the following Android permissions:

• CAMERA — Required for the AR Level overlay feature and for attaching photos to measurements. The camera is only active while these features are in use.
• READ / WRITE_EXTERNAL_STORAGE — Used only to save and read measurement photos on older devices (Android 9 and earlier). Not used on newer Android versions.
• INTERNET & ACCESS_NETWORK_STATE — Required by the Google AdMob SDK to load and display advertisements.
• VIBRATE — Used to provide haptic feedback when the device reaches level.
• Advertising ID — Used by Google AdMob to deliver and measure advertisements.

3. How We Use Information

We use information in the following ways:

• To provide the spirit level, AR overlay, angle calculator, and measurement-saving features.
• To generate PDF and CSV reports at your request, for you to export and share.
• To display advertisements through Google AdMob, which helps fund free access to the App.

We do not sell your personal data. We do not operate any backend server that receives your measurement data, sensor readings, or photos.

4. Third-Party Services

The App integrates the following third-party services:

• Google AdMob — Displays banner, interstitial, native, and app-open advertisements. Subject to the Google Privacy Policy and AdMob policies.
• Google Play Services — Used internally by the AdMob SDK for ad delivery and device identification.

You can reset or limit ad personalisation at any time from your device under Settings → Google → Ads.

5. Data Retention & Deletion

All measurement data and photos are stored locally on your device. You can delete individual measurements from within the App at any time, or clear all of them using the in-app controls on the Saved Measurements screen.

Uninstalling the App removes all locally stored data, including the measurement database and any photos saved by the App.

6. Children's Privacy

Spirit Level is not directed at children under 13 years of age. We do not knowingly collect personal information from children. If you believe a child has provided us with personal information, please contact us and we will take steps to delete it.

7. Security

Because your measurement data is stored locally on your device, its security is governed by your device's own protections (screen lock, encryption, etc.). We recommend keeping your device software up to date and using a secure screen lock.

8. Your Rights

You have the right to:

• Access and delete all data the App stores locally, at any time, using in-app controls.
• Reset or limit ad personalisation via your device's advertising settings.
• Contact us with any privacy-related questions or requests.

9. Changes to This Policy

We may update this Privacy Policy from time to time. Any changes will be reflected on this page with an updated effective date. Continued use of the App after changes constitutes your acceptance of the revised policy.

10. Contact Us

If you have any questions, concerns, or requests regarding this Privacy Policy, please contact us:

Email: toolsappdang@gmail.com

We aim to respond to all enquiries within 3 business days.