Short version: the app is free and supported by ads. Every calculator, decoder, and reference works fully offline; only ads need the internet. The app itself keeps no account and stores what you enter only on your device. Ads are served by Google, which collects an advertising identifier and related data as described below.
Ads are provided by Google AdMob (the Google Mobile Ads SDK). To serve and measure ads, the SDK and Google may collect and process:
This data is shared with Google, acting as a third party, to serve and measure advertising. Google's use of it is described in the Google Privacy Policy and in How Google uses information from sites or apps that use our services.
Where consent is required (for example in the EEA and the UK), a consent form is shown before ads load. You can review or change your choice at any time from About → Privacy options inside the app. You can also reset or limit your advertising identifier in your device settings (Settings → Google → Ads).
Everything you enter — calculator values, favorites, recently used tools, and calculation history — is stored only in the app's private storage on your device. It never leaves it through us: we run no servers and receive no data.
If you have Android Backup enabled on your device, the operating system may include the app's on-device data in your device backup (for example, to restore your favorites on a new phone). That backup is managed by Android and your Google account under Google's privacy policy; we have no access to it.
Installing and updating the app is handled by Google Play, which may process data as described in its own privacy policy. This is outside our control.
The app is a general-audience utility and is not directed to children. Apart from the advertising described above, it collects no personal data from anyone.
If a future version of the app changes what data is handled, this policy will be updated here before that version is released, and the change will be reflected in the app's Play Store data safety section.
Questions about this policy: inin.formet@gmail.com