Conversion: Unit Converter
Currency, metric & imperial
$0.99 · Designed for iPad. Not verified for macOS.
Rebuilt from the ground up for iOS 26: live exchange rates, twelve categories, 33 languages and full accessibility. Pay once — no ads, no subscription, no tracking.
Type a number. Read the answer. That is the entire app.
Conversion has been on the App Store since 2012. Version 4 is a complete rebuild — modern, quick, and still refreshingly free of clutter.
BOTH UNITS, ALWAYS IN VIEW
The two units face each other in the middle of the screen, right where you left them last time. Flick either one to change it, or tap an amount to turn the conversion around. Nothing to drill into.
TWELVE CATEGORIES, 96 UNITS
Length · Area · Volume · Weight · Temperature · Speed · Pressure · Power · Energy · Time · Computing — and Currency, with more than 160 world currencies.
LIVE EXCHANGE RATES
Rates refresh on their own and are stored on your device, so conversions still work on a plane or underground. When a rate is out of date the app says so, rather than quietly handing you an old number.
YOUR LANGUAGE, YOUR NUMBERS
33 languages. Unit names, decimal separators and numbering systems all follow your region — so a comma lands where a comma belongs, and Arabic and Devanagari numerals are drawn properly.
BUILT FOR iOS 26
Liquid Glass, a color for every category, fluid animation, haptics, and Dark Mode throughout.
ACCESSIBLE FROM THE START
Every control is labeled for VoiceOver. Text scales to the largest accessibility sizes. Reduce Motion is respected. A hardware keyboard drives the whole app.
NOTHING COLLECTED
No account, no ads, no analytics, no tracking. The app makes one kind of network request — for published exchange rates — and it carries nothing about you.
Pay once. No subscription.
Version 4 is a complete rebuild.
• Currency works again. The old rate source shut down years ago; rates now come from a live feed, refresh automatically, and keep working offline.
• Redesigned for modern iPhone and iPad — Dark Mode, a color for every category, and an iPad layout that uses the whole screen.
• Full VoiceOver, Dynamic Type and Reduce Motion support, plus hardware keyboard input.
• 33 languages, with unit names, decimal separators and numerals that follow your region.
• Your saved units carry over from the previous version.
The developer, Duncan Campbell, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Duncan Campbell
- Size
- 1.6 MB
- Category
- Utilities
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - iPad
Requires iPadOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
English and 32 more
- English, Arabic, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Malay, Norwegian Bokmål, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Slovak, Spanish, Swedish, Thai, Traditional Chinese, Turkish, Ukrainian, Vietnamese
- Age Rating
4+
- 4+
- Copyright
- © 2026 Duncan Campbell
