iPhone & iPad
Every unit you need in one converter — with live currency, cryptocurrency and precious-metal rates, and a keypad built for fast entry.
Download on the App StoreExchange rates for 160 world currencies, 126 cryptocurrencies, and gold, silver, platinum and palladium — with real coin logos and metal badges.
A simple single converter, or a carousel that keeps several units on screen at once so you can read them all off together.
One field searches all 685 units. Each result is tagged with the section it came from, so the same unit name in two places is never ambiguous.
Running pace, shoe and ring sizes, blood sugar, fuel economy, torque, radiation and luminance — alongside length, weight and temperature.
Fully localized in 13 languages, including right-to-left layout for Arabic, with numbers formatted to your region's conventions.
…and 56 more.
Questions, bug reports, and requests for new units or categories are all welcome — most of the unit list exists because someone asked for it.
Email strikespark.feedback@gmail.com. Please include your device, your iOS version, and the language the app is running in. For a conversion that looks wrong, the two units and the number you typed are usually enough to reproduce it.
For anything about a subscription — restoring, cancelling, or a refund — purchases are handled by Apple, so you can manage them in Settings → your name → Subscriptions on your device.