A calculator where you need it
Use +, −, ×, ÷, %, AC, Backspace, and = directly on the main screen. Decimal point and comma are supported, along with Copy and Paste.
ClearRate
Currency converter and calculator, together on one screen
Enter one amount or a full expression once. ClearRate instantly recalculates every selected fiat currency and crypto asset at the same time.
One calculation. Multiple currencies.
A regular converter makes you repeat the same input. ClearRate keeps 2–5 selected assets on one screen and updates every result together.
01
Enter once
Type an amount or a mathematical expression.
02
Choose your assets
Keep the currencies and crypto you actually use.
03
See every result
All selected values recalculate immediately.
Everything stays in one working view
Calculate, compare, search, and arrange the assets you need without moving between separate converter and calculator screens.
Fiat and crypto together
Compare 2–5 selected assets at once, including fiat currencies and BTC, ETH, USDT, USDC, BNB, SOL, TON, and TRX.
Your list, in your order
Change the active currency, add, replace, or remove assets, use quick Swap with two currencies, and drag to reorder a 3–5 asset workspace.
Search the way you remember
Find assets by code, currency name, country, or aliases. Multilingual search and both English and Russian interfaces are built in.
See ClearRate in action
Real app interface: calculator, simultaneous currency conversion, currency search, and working with cached exchange rates.
Useful even when the connection drops
ClearRate fetches current exchange rates and caches the latest successful update. Without a network, you can continue calculating with the last known rates.
Your selected assets, their order, recent choices, and other essential app state are kept locally on your device.
Private by design
No registration, accounts, ads, user tracking, advertising analytics, or geolocation. Calculator input and conversion amounts are not sent to the developer.
Privacy PolicyDownload ClearRate
Calculate once, compare all your selected currencies and crypto assets. ClearRate is available for iPhone and Android.
About the project
From architecture to release
ClearRate is a published app for iOS and Android, covering the complete development process — from calculator and exchange-rate architecture to localization, testing, and release on the App Store and Google Play.
- Application architecture
- Flutter and Dart with a shared cross-platform codebase; the app is published for iOS and Android.
- Rate reliability
- Frankfurter and ExchangeRate-API for fiat, CoinGecko and Binance for crypto, with fallback logic and local caching.
- Product logic
- A local asset catalog, custom calculator/parser logic, multilingual search, persistence, adaptive 2–5 asset UI, swipe actions, drag-and-drop, and clipboard integration.
- App release
- RU/EN localization, testing, release build preparation, and publishing on the App Store and Google Play.
- Flutter
- Dart
- iOS
- Android
- REST APIs
- Local cache
- App Store Connect
- TestFlight
- Google Play