Kalku

Kalku is a currency converter built around one idea: one amount, converted to every currency you care about, at once.

FEATURES
• Live exchange rates, refreshed automatically, with clear "last synced" status — a failed refresh never clears your rates, it just tells you they're stale.
• A full expression calculator built into the keypad — type math, not just numbers.
• Fiat currencies, 20 curated cryptocurrencies, and precious metals, all in one list.
• Home screen widgets for a rate card, a calculator, and a multi-pair watchlist (Android and iOS).
• Rate history charts, manual rate overrides, and a choice of rate sources.
• A running log of what things actually cost you once conversion is factored in.
• Custom currencies for anything not covered out of the box.
• A portfolio view across every currency you track.
• 16 languages, with every ISO currency name resolved to your device's own locale.

PRIVACY
Everything you enter — amounts, expressions, custom currencies — stays on your device. Kalku never sees or sends what you type. Anonymous crash and usage reporting can be turned off entirely in Settings.

FREE VS PRO
The free tier tracks up to 5 currencies with the default rate source. Kalku Pro removes that limit and unlocks widgets, rate overrides, custom currencies, the rate chart, the portfolio view, the real cost log, and every rate source — as a subscription or a one-time lifetime purchase.

No account required. No ads.