Support

Open any calculation and tap the star icon. Favorites appear in the Favorites tab — or pinned at the top of the Calculations list on devices where the Assistant tab takes its place — 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 is a one-time in-app purchase, not a subscription. It unlocks:

• AI Assistant — ask percent questions in plain English (requires Apple Intelligence, iOS 26+).
• History — save calculations with notes and find them again later.
• Currency converter — live exchange rates, updated daily from European Central Bank data.
• Travel Mode — see foreign prices in your home currency on every money calculation.
• Unlimited favorites — the free version supports one.
• 10 accent colors and pinned defaults (pre-fill your usual values).

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.

The Assistant runs on Apple's on-device intelligence, so it needs an iPhone that supports Apple Intelligence running iOS 26 or later, and Apple Intelligence must be enabled in iOS Settings. On devices without it, the middle tab shows your Favorites instead — every calculator still works normally.

Tap the airplane button at the top of the Calculations screen and pick the currency you're shopping in. From then on, every money result also shows the approximate amount in your home currency — handy for sales, tax, and tipping abroad. Tap the airplane again to turn it off, or tap the banner on the Calculations screen to switch currency mid-trip.

With Pro, tap Save on any result — from a calculator screen or the Assistant — and it's kept in History (the clock button, top-left). Saved entries can be pinned and given notes; the Recent list keeps your latest saves in order. Everything is stored only on your device, and you can delete entries with a swipe.

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.

By default the app follows your iOS region. You can override it inside the app under Settings → Regional — and if you're traveling, Travel Mode lets you calculate in one currency while seeing your home currency alongside.

Sixteen: English, Chinese (Simplified and Traditional), Danish, Dutch, French, German, Italian, Japanese, Korean, Norwegian, Portuguese, Spanish, Swedish, Turkish, and Vietnamese — each with the right number formatting. The app follows your iOS language automatically, or you can pick a language just for this app in Settings inside the app.

Every calculation works fully offline. The currency converter and Travel Mode use a network connection to fetch fresh exchange rates — the latest rates are cached on your device so they keep working offline too, with a notice when they're getting stale. Purchasing or restoring Pro talks to the App Store and needs a connection.

No. There is no analytics, no advertising, no tracking, and no account system. Your inputs, favorites, history, and Assistant chats stay on your device. The only network requests are anonymous exchange-rate downloads for the currency features. 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.