The amount field does maths
Split a bill, add a fee, times a nightly rate — type 129×3+45.50 and watch it solve, then convert.
iPhone · Android
One amount. Every currency.
Type an amount once and read it in every currency you track. The amount field does maths, the rates come down in the background, and nothing you type ever leaves your phone.
One to all. Type an amount in EUR — see it converted into USD, GBP, TRY and 13 more currencies at once.
What it does
Ten things, and no menu to hunt through for any of them.
PRO
Rates without opening anything
A rate card, a calculator and a watchlist — refreshed in the background, right on your home screen.
PRO
Rate history
Compare two currencies over any range, and see the 7-day, 1-month or 1-year high, low and average.
PRO
See what installments really cost
Paying in installments while the rate moves means you gain or lose on the exchange — Real Cost tracks that difference, payment by payment.
PRO
Got a better rate?
Override any rate with the one you were actually quoted — an exact number, or a percentage off live. Yours wins until you clear it.
PRO
Custom rate sources
Choose Kuveyt Türk or QNB's buy or sell rate for TRY, instead of the central bank's daily reference.
Crypto included
Bitcoin, Ether, Solana and more sit in the same list as your cash.
PRO
Did what you bought hold up?
Log a currency you hold and what you paid — Kalku freezes the rate you got and compares it to today's, gain or loss included.
PRO
Custom currencies
Name a currency, set its rate against USD, give it a code and symbol, and it converts everywhere your other currencies do.
Kalku Pro
One purchase unlocks everything Kalku can do.
- Home-screen widgets
- Manual rate overrides
- Custom currencies
- Rate history & charts
- Custom rate sources
- Track unlimited currencies
- Portfolio tracking
- Real cost of installment purchases
Monthly, Annual, or a one-time Lifetime purchase — whichever you prefer. The converter, the calculator keypad, the currency list and your history are free, and stay free.
Yours, and only yours
Everything — your list, its order, custom currencies, manual overrides and source choices — is stored on this device. No account, no cloud sync, no ads. The only thing that ever leaves is anonymous usage data, and you can turn that off any time.
- No account, ever — nothing to sign up for
- No ads and no ad identifier
- Anonymous analytics you can switch off in Settings
- Export everything you have as one file, and import it back