UnitFlip — Privacy Policy

Last updated 1 September 2026

UnitFlip converts units and currency on your device. It has no accounts, no sign-in, no ads, and no server of its own. It makes exactly one kind of network request — fetching the day's published exchange rates — and that request carries nothing about you or what you typed.

What UnitFlip stores on your device

• Your preferences. The category you last used, the unit pair you chose within each category, and the units you picked most recently, so the app opens the way you left it.
• A cached exchange-rate table. The most recent rates the app downloaded, plus the date they were published, so currency still converts when you have no signal.
• Numbers you type are not saved. The amount in the input field exists only while the app is open. Closing it discards the value. There is no history to look back through.
• Clearing the app's storage, or uninstalling UnitFlip, removes all of this permanently.

All of it stays on your device. None of it is transmitted anywhere, and we have no way to read it.

Permissions

UnitFlip requests one Android permission: internet access. It is used solely to refresh exchange rates. The app has no access to your camera, photos, contacts, location, microphone, or files.

All thirteen unit categories — length, mass, temperature, volume, area, speed, time, data, energy, power, pressure, fuel economy and angle — work with that permission denied and with no connection at all. Only the currency refresh needs it, and the app ships with a rate table built in, so currency converts on the very first launch even if the device has never been online.

Network activity

• Exchange rates. UnitFlip requests the day's published rates from open.er-api.com. It is an ordinary unauthenticated request for a public list of rates. It sends no account, no identifier, no device information beyond what any web request unavoidably reveals to the server it contacts, and nothing about the numbers or units you have entered. There is no request body.
• Nothing else leaves the app. No other host is ever contacted. What you type is never transmitted, because the app has no endpoint to send it to.
• Update checks. On launch, UnitFlip asks the Google Play Store app already installed on your device whether a newer version exists. That conversation happens between the app and Play on your device; it carries nothing about your use of UnitFlip, and we receive nothing from it.

The rate provider is a third party and receives the request itself; their handling of it is governed by their own policy. They receive no information identifying you from us.

What we do not do

• No accounts, no sign-in, no profile.
• No ads and no advertising identifiers.
• No analytics or crash-reporting SDK of any kind.
• No location, and no tracking across apps or websites.
• We do not sell or share your data — we never receive it in the first place.

Children

UnitFlip is not directed at children under 13 and we do not knowingly collect information from them. As described above, the app collects no personal information from anyone.

Changes

If this policy changes, the revised version will be posted here with a new date at the top.

Contact

Questions about this policy: azizsafaroff24@gmail.com