ChangeRate
A simple currency converter for quick calculations while traveling. Automatically detects the currency based on your location.
View on the App Store →KOUKI
Apps & tools I've built.
A collection of small, focused apps and browser-based tools made as a hobby — from a currency converter on the App Store to calculators and converters you can use right here.
APP STORE
Apps
Apps currently available on the App Store.
Web tools
Free browser-based calculators and converters — calculator, clock, era converter, and more. No install needed.
Contact us
Questions, bug reports, or feedback about any app above? Please include the app name, device, and OS version.