Koin - Exchange Rates

Koin - Exchange Rates

Fastest Currency Converter

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Free

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Details

Released
April 1, 2026
Updated
September 29, 2026

Features

Koin - Exchange Rates screenshot #1 for iPhone
Koin - Exchange Rates screenshot #2 for iPhone
Koin - Exchange Rates screenshot #3 for iPhone
Koin - Exchange Rates screenshot #4 for iPhone
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ipad
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About

Koin is the currency converter built for travelers who just want to know what something costs in their money. Open the app, type the amount, see the result. That's it. HOW IT WORKS Set your home currency once during onboarding — the currency you think in. Then pick the currency of wherever you're traveling. Koin shows you the conversion in real time as you type. FEATURES • Instant conversion as you type • 150+ currencies from every corner of the world • Daily exchange rates, cached for offline use • Swap currencies with one tap • Searchable currency list — find by name, code, or country • Comma or period decimal format — your choice • Haptic feedback for a satisfying, tactile feel • Clean, distraction-free design BUILT FOR TRAVEL Whether you're checking a price tag in Tokyo, splitting a bill in Berlin, or haggling at a market in Marrakech — Koin gives you the answer before the moment passes. PRIVACY Koin does not collect personal data. Exchange rates are fetched from ExchangeRate-API. Your currency preferences are stored only on your device.
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What's New in Koin

1.0.3

September 29, 2026

• Swap keeps your amount: flipping the direction now carries the converted value over — and swapping back and forth always gives the same numbers. • Works offline after swapping: rates for both directions come from the rates already on your phone, no connection needed. • Fresh rates every day: rates refresh automatically when a new day starts, even if the app was left open in the background. • Cleaner numbers: currencies without cents (JPY, KRW, VND, IDR, …) no longer show ",00", and the rate line is readable for every currency (e.g. 1.000 JPY = 6,70 USD). • Faster input: changing a currency keeps your amount, long-press ⌫ clears the input, and picking the currency from the other side simply swaps them. • Improved layout on iPad, with large text sizes and on small screens. • New setting: choose whether swapping keeps or resets the amount.

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