Yahoo! Finance - Currencies Center
XE.com
Tweetbot
Valuta+
Currencies
Elk
xCurrency - Smart Currency
Universal Currency Converter
xChangeApi
Fixer.io
exchangeratesapi.io
Open Exchange Rates
ExchangeRate-API
BankExchange
Kantox
BestExchangeRates
Yahoo! Finance - Currencies Center xChangeApiXE.com - XE.com Inc. (XE) is a Canadian online foreign exchange services company.
Fixer.io - Fixer provides a free, simple, and lightweight API for current and historical foreign exchange rates and currency conversion. The API tracks rates published daily by the European Central Bank.
Tweetbot - Sync your timeline across your iPhone, iPad, and Mac. Mute tweets by user, hashtag, tweet source, or keywords (including regex). 3rd Party support for image, video, read later, and timeline sync services.
exchangeratesapi.io - Foreign exchange rates API with currency conversion.
Valuta+ - Valuta+ is a super simple & free currency converter. The interface is fast and makes you convert exchange rates very easily. This app have more than 160+ currencies for you and is always updated.
Open Exchange Rates - Free, hourly-updated exchange rates - a simple, accurate, open-source JSON API. Free for personal use, a bargain for everybody else.