Privacy Policy for Calcs
Calcs is a calculator app with unit, currency, percentage, date, BMI and loan tools. This policy explains what the app does with information.
The short version: Calcs does not collect, store on a server, sell or share any personal information. Everything you enter stays on your phone.
Developer and contact: Calcs, a personal project by Sharfudheen Bismillah · bsharfudheenoffice@gmail.com
What stays on your device
Calcs saves a few things on your phone so the app remembers your choices. They are stored by the app on your device only and are never sent to us or anyone else:
- your settings (theme colour, light or dark, AMOLED, and the options of the converters);
- your calculation history (the last 100 calculations);
- your favorite and recent conversions, and where you left each converter;
- the exchange rates last downloaded;
- the state of the home-screen widgets.
There is no account, no sign-in and no profile.
The one network request: exchange rates
The Currency tool includes exchange rates that ship inside the app, so it works offline. If you tap Update rates now, or if you leave Auto update on (it is on by default) and the rates are more than about 12 hours old when you open the app, the app downloads current rates from a public rates service (open.er-api.com, run by ExchangeRate-API).
- The request asks only for the public table of rates. It contains no personal information, no account, no advertising or device identifier, and nothing you typed.
- Like any request on the internet, the service you contact can see your device's IP address and ordinary connection details. Calcs does not receive or see that information, and has no server of its own. How that service handles it is described by its own terms and privacy policy at exchangerate-api.com.
- You control this: turn on Wi-Fi only in the Currency settings to keep it off mobile data, or turn on Update only when I tap and the app never downloads anything by itself. If you never update, the app never uses the internet at all.
To do this the app asks Android for two permissions: INTERNET (to download the rates) and ACCESS_NETWORK_STATE (to tell Wi-Fi from mobile data).
Things you choose to do
- Share: when you tap Share on a conversion, the text of that conversion is handed to the app you pick in Android's share sheet. Calcs does not see where it goes.
- Copy and paste: copying writes a result to the clipboard. The app reads the clipboard only when you choose Paste.
What Calcs does not do
- No advertising, and no ad networks.
- No analytics, usage tracking or crash-reporting services.
- No location, contacts, camera, microphone, photos or files are accessed.
- No data is sold, rented or shared with third parties.
- No third-party software inside the app collects data. The app is built with the Flutter framework and uses only Android's standard features.
Backups
Android may include an app's saved data (your settings, history and favorites) in your phone's own backup to your Google account, if you have device backup turned on. That is controlled by your phone's settings and Google, not by Calcs.
Keeping and deleting your data
Your data lives only on your phone. You can remove it at any time:
- History: use Clear on the History screen.
- Recent conversions and saved rates: use Clear recent conversions (Unit Converter settings) and Clear saved rates (Currency settings).
- Everything: clear the app's storage in Android's settings (Apps → Calcs → Storage → Clear data), or uninstall the app.
Because nothing is sent to us, there is no copy on our side to delete.
Children
Calcs is a general-purpose utility and is not directed at children. It collects no personal information from anyone, including children.
Information, not advice
Exchange rates are daily reference rates for information only and can differ from the rates a bank or card provider charges. The BMI tool is a general guide, not a diagnosis, and the loan tool is a payment calculator, not financial advice.
Changes to this policy
If the app's handling of information changes, this page will be updated and the effective date above changed. The version of the app the policy applies to is shown at the top.
Contact
Questions about this policy: bsharfudheenoffice@gmail.com.