Currency Converter : Fast is a simple currency converter for iPhone that converts as you type. It supports more than 150 currencies, from the US Dollar to the Colombian Peso, keeps its exchange rates up to date automatically, and shows the result to three decimal places. The idea is to tell you what your money is worth in a few moments, without extra steps.

It is made for travelers and for anyone who manages money across borders: comparing prices while shopping abroad, checking what a bill or an invoice comes to in your home currency, splitting costs with friends from another country, or keeping an eye on how far a budget will stretch. If you need a quick, reliable answer rather than charts and market analysis, this app is aimed at you.

The feature list is deliberately short. More than 150 currencies are supported, covering almost all currencies around the world. Exchange rates update automatically, so you do not have to refresh anything before converting. The amount converts as you type, so there is no Convert button to press. Results use three decimal places for greater accuracy, which keeps small amounts and currencies with large unit values from being rounded away. The app also shows the current exchange rate for the pair you are converting, so you can see the rate behind the number, not just the final figure.

Using it takes a few seconds. Open the app, choose the currency you have and the currency you want, and start typing an amount. The converted value updates with every digit you enter. If you want to know the underlying rate, it is on the same screen. To check another amount, just type again. Because rates refresh on their own, you can open the app at any time and trust that you are working with current figures rather than a rate you saved days ago.

The interface is kept simple on purpose. There are no dashboards or menus to work through, which keeps the app quick to use while you are standing at a shop counter, reading a menu, or checking a booking. The developer also invites comments and feedback through the App Store listing.

Currency Converter : Fast is a good choice if you want one job done well: type a number in one currency and read what it is worth in another, with current rates and enough decimal places to be accurate. Currency Converter : Fast is free to download from the App Store, with an optional Premium in-app purchase. It runs on iPhone and iPad and requires iOS 17.6 or later.