Effective date: 5 November 2026
1. Who we are
This policy explains how the Android app Calculator (package name
com.calculator.math.solver), published by VASUDEV NERROW FAB
("we", "us"), handles information when you use it.
2. Information that stays on your device
These are saved only in the app's private storage on your phone. We never receive them:
- Calculation history, unit, currency, EMI and discount inputs
- Notes you write in the Notes tool
- Browser bookmarks, open tabs and browser settings
- Your language, theme, home screen layout, hidden apps and other settings
- Device events shown on the Today page (for example charging or Wi-Fi changes)
They are removed when you clear the app's data or uninstall it. If Android backup is on in your phone's settings, Android may include the app's data in your own Google account backup; that backup is controlled by you and Google, not by us.
3. Permissions and why we use them
| Permission | What it is used for |
|---|---|
| Internet, network and Wi-Fi state | Loading ads, Firebase services, currency rates and web pages; showing the Wi-Fi quick tool. |
| Usage access (only if you allow it) | The optional App usage screen shows how long you used apps today. This is read and shown on your device only and is not sent to us. |
| Notification access (only if you allow it) | Notification dots on app icons. The app only counts active notifications per app; it does not read, store or send their content. |
| Notifications | Lets the app post its own notifications. You can refuse this. |
| Request app deletion | Opens Android's uninstall screen when you choose Uninstall on an app. Android asks you to confirm. |
| Set wallpaper | Changes the wallpaper when you pick one in the app. |
| Expand status bar, reorder tasks, vibrate | Swipe down for notifications, bring the right screen to the front, and key-press feedback. |
| Advertising ID and ad attribution | Used by the ad services in section 4 to show and measure ads. |
| Install referrer, Play licence check, wake lock, foreground service, basic phone state | Added by Google Play, Firebase and ad libraries for install attribution, scheduling their background work and basic device information. |
The QR scanner uses Google Play services code scanner. The camera is handled by Google Play services; the app receives only the decoded text of the code, not camera images, and does not ask for camera permission itself.
4. Third-party services
The app includes the following services. They collect information directly from your device under their own privacy policies.
Advertising
We show ads through Google AdMob and Google Ad Manager. To decide which ads to show, ad partners may also take part through AdMob mediation: Meta Audience Network, AppLovin, Unity Ads, Liftoff (Vungle) and Pangle.
These services may collect your device's Advertising ID, IP address, device model and operating system, language, app version, approximate location derived from your IP address, and how you interact with ads. They use this to show ads, limit how often you see them, measure performance, and prevent fraud. Where the law requires it (for example in the EEA, the UK and Switzerland), the app asks for your consent through Google's consent form before ads are personalised.
- Google: policies.google.com/privacy and how Google uses information from apps that use its services
- Meta: facebook.com/privacy/policy
- AppLovin: applovin.com/privacy
- Unity: unity.com/legal/privacy-policy
- Liftoff (Vungle): liftoff.io/privacy-policy
- Pangle: pangleglobal.com/privacy
Google Firebase
- Firebase Analytics: app usage events (such as finishing setup or an ad being shown), app instance ID, device and app information, and approximate location from your IP address. We use it to understand how the app is used and to improve it.
- Firebase Crashlytics: crash reports with the device model, Android version, app version and the state of the app when it crashed, so we can fix bugs.
- Firebase Remote Config: a Firebase installation ID, used to download app settings (for example which ads are shown).
Firebase privacy information: firebase.google.com/support/privacy
Other connections
- Currency rates are downloaded from ExchangeRate-API (open.er-api.com). No personal information is sent; like any web request, it sees your IP address.
- Web pages: when an ad is not available the app may open a web page in a Chrome Custom Tab, and the built-in browser loads the sites and search engine you choose. Those websites have their own privacy policies and may use cookies. The games on the Games screen are built into the app and run on your device.
- Our other apps: icons and names of our other apps are loaded from their Google Play pages.
5. Your choices
- Ad consent: where consent is required, you can change it at any time in the app under Settings › Ad privacy options.
- Advertising ID: you can reset or delete it in your phone's settings (Settings › Privacy › Ads, or Google › Ads, depending on your phone).
- Permissions: usage access, notification access and notifications are optional, and you can turn them off in Android settings at any time.
- Home screen: you can stop using Calculator as your home screen app in Android settings at any time.
- Delete your data: clear the app's data or uninstall the app to remove everything stored on your device.
6. Data retention and deletion
We do not run our own servers that store your personal information. Analytics and crash data are kept by Google Firebase for the retention period set in Firebase and then deleted. Ad partners keep data according to their own policies linked above. To ask us to delete Analytics or Crashlytics data linked to your device, contact us at the address below. Please include the app name; we may need your app instance ID to find the data.
7. Security
Data sent by the app and its services travels over encrypted connections (HTTPS). Data on your device is kept in the app's private storage, which other apps cannot read.
8. Children
The app is not directed at children under 13, and we do not knowingly collect personal information from children. If you believe a child has provided information through the app, contact us and we will help remove it.
9. Changes to this policy
We may update this policy when the app changes. The new version will be posted on this page with a new effective date.
10. Contact us
VASUDEV NERROW FAB
Email: vasudevnf@thehmv.com