Privacy Policy

Last updated: 8 August 2026

Bubble Level – Spirit Level does not collect or store any personal data itself. Your measurements, calibration and settings never leave your device. The app does show advertising, which is served by Google AdMob — that service collects some data, and this policy explains what and how you can control it.

Personal data collected by usNone

Measurements or calibration sent anywhereNever

User accountsNot required

AdvertisingYes — Google AdMob

Third-party SDKsGoogle Mobile Ads only

Information we collect

We do not collect, store, or receive any personal information about you. The app has no user accounts, no sign-in, no analytics of our own, and no crash reporting. We have no server, and no measurement you take is ever transmitted.

Information stored on your device

To work as expected, the app saves the following locally on your device:

Your calibration offsets — the zero reference recorded when you calibrate
Your preferences — precision, level tolerance, haptic feedback, sound, keep screen awake, orientation lock, and theme
Your advertising consent choice, so you are not asked repeatedly

This information stays in the app's private storage on your device and is removed when you uninstall the app.

Advertising

The app is free and is funded by advertising. Ads are served by Google AdMob, a service provided by Google LLC. To deliver and measure ads, Google may collect and process:

Your device's advertising identifier (Android Advertising ID / App Set ID)
Device and app information — model, operating system version, app version, language, and general region
Approximate location derived from your IP address (not precise GPS location)
Ad interaction data — ads shown, impressions, and clicks

This data is processed by Google, not by us. We never receive it in a form that identifies you; we only see aggregate earnings and performance reports.

Google's handling of this data is described in the How Google uses information from sites or apps that use our services notice and in the Google Privacy Policy.

Your advertising choices

Consent. If you are in the European Economic Area, the United Kingdom, or Switzerland, you are asked on first launch whether you consent to personalised advertising. You may accept or decline, and you can change your choice at any time in the app's Settings under Privacy options.
Reset or delete your advertising ID. Android Settings → Privacy → Ads lets you reset your advertising ID or delete it entirely, which stops personalised advertising across all apps.
Declining does not remove ads. If you decline personalised advertising you will still see ads, but they will be non-personalised — chosen from general context rather than your interests.

Permissions

The app uses your device's motion sensor (accelerometer) to measure tilt, and the vibration motor to confirm a level reading. It requires internet access solely to load advertisements — measuring works fully offline, with no ads shown while you are disconnected. It requests no location, camera, storage, microphone, or contacts permission.

Children's privacy

The app is not directed at children under 13 and we do not knowingly collect information from them. Ad requests are configured so that advertising is treated as non-personalised where a user is identified as a child or where age is unknown in jurisdictions that require it.

Data retention and deletion

We hold no data about you, so there is nothing for us to retain or delete. Everything the app stores lives on your device and is removed when you uninstall it. Data held by Google in connection with advertising is retained according to Google's own policies, linked above; resetting or deleting your advertising ID in Android Settings severs the link to your device.

Accuracy

The app reads your device's accelerometer, so measurement accuracy depends on your hardware and on calibration. It is intended as an everyday reference. For structural, safety-critical, or certified work, use a certified instrument.

Changes to this policy

If this policy changes, the updated version will be published at this address with a new date. Material changes affecting advertising or data handling will be reflected here before they take effect.

Contact

Questions about this policy or about the app: kontakt@jawadkhan.de