Support

Open any calculation and tap the star icon. Favorites appear in the dedicated Favorites tab so you can jump straight to them. The free version supports one favorite — unlocking Pro removes the limit.

In Settings, you can hide individual calculations or whole categories so the list stays focused on what you actually use. Hidden items can be turned back on at any time from the same settings screen.

Pro removes the one-favorite limit so you can star as many calculations as you like. It is a one-time in-app purchase, not a subscription. You can also leave a tip from the same screen if you'd like to support development further — tips are entirely optional and unlock nothing extra.

Open Settings inside the app and tap Restore Purchases. Make sure you're signed in to the same Apple ID you used for the original purchase. The app re-checks the App Store and re-applies your Pro entitlement.

Three quick checks:

1. Confirm you're signed in with the same Apple ID that made the purchase.
2. Tap Settings → Restore Purchases.
3. Force-quit and relaunch the app.

If it still doesn't unlock, email support@thomasaj.com with your device model, iOS version, and approximate purchase date.

The currency symbol comes from your iOS region setting. Change it under iOS Settings → General → Language & Region → Region. The next time you open the app, prices and tax fields show the correct symbol.

English, German, Norwegian, and Dutch. The app follows your iOS language setting automatically — change it under iOS Settings → General → Language & Region, or per-app under the app's own row in Settings on iOS 13 and later.

Yes, fully. The only thing that needs a network connection is restoring an in-app purchase, which talks to the App Store.

No. There is no analytics, no advertising, no tracking, and no account system. Your inputs and favorites stay on your device. Full details are in the Privacy Policy.

The fastest way is to delete the app from your device and reinstall it from the App Store. That clears every locally stored setting and favorite. Your in-app purchases stay tied to your Apple ID — use Restore Purchases after reinstalling to get Pro back.

Email support@thomasaj.com. For bugs, include:

• Device model (e.g., iPhone 15) and iOS version.
• App version (from the Settings screen inside the app).
• What you were doing when the problem happened.
• A screenshot if you can grab one.

I'll follow up directly.