Privacy policy

Who and what this covers

This policy covers Mizan Calculator and this support website, published by OSLLC. The app requires no account and contains no advertising, in-app analytics trackers or automatic crash reporting. It does not request access to your location, camera, microphone or contacts.

Data on your device

Calculations and results are processed on your device. History, form inputs, favourites, settings and downloaded exchange rates are stored in the app’s local storage; they are not sent to OSLLC servers.

History is limited to 200 records; the total local saved-state budget is 1 MiB. New records are retained within these limits. Clear history inside the app, or remove all local app data through your device’s application settings. History and settings remain until you clear them or older history records are replaced at the capacity limit.

Exchange rates and connections

When you request an exchange-rate refresh, the app connects to the Frankfurter API over HTTPS. This exposes your IP address and ordinary technical connection information to the service and its Cloudflare infrastructure. Calculation amounts, form inputs and history are not included in this request. Downloaded rates are cached on your device.

Frankfurter provides daily reference rates. Source dates can differ and are shown in the app. See the provider’s documentation and privacy statement.

This support website is hosted on Cloudflare Pages. OSLLC adds no cookies, analytics scripts, tracking pixels or contact forms. Cloudflare may process IP addresses, requests and technical connection data to deliver the site and protect its infrastructure under its own policy. See the Cloudflare privacy policy. These providers may process information in different countries; their own statements describe their retention practices.

Sharing and support messages

The Share button opens the device’s share sheet only when you choose to use it, passing the selected result text. You select the destination app and recipient; the destination service’s privacy terms apply.

If you email support, your address and the content you voluntarily send are received by OSLLC and email service providers. OSLLC uses that information to respond to and resolve your request. Calculation history is not attached automatically. Please avoid sending unnecessary sensitive information. You may request deletion of support correspondence through the same channel.

Deletion, rights and contact

OSLLC cannot remotely view or restore your calculation history. Manage local data through the app and your device settings. For access, correction or deletion of support correspondence, or questions about this policy, contact:

Publisher: OSLLC. Any changes to this policy will appear on this page with an updated date. If a new data-processing feature is added, the relevant explanation will be updated before that app release.