Based on our record, Flip - Currency Converter seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I guess it depends on your definition of "safe". BuzzKill is developed by Sam Ruston, a trusted developer. People usually install his apps to be safe (Bouncer, for example). Source: almost 3 years ago
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.
XE.com - XE.com Inc. (XE) is a Canadian online foreign exchange services company.
Cocorate.com - Online currency and cryptocurrencies exchange rates calculator helps you convert anything in real-time.
xCurrency - Smart Currency - A simple ads-free currency converter.
Yahoo! Finance - Currencies Center - Currency Converter from Yahoo! Finance.
CurrencyScoop - Developer-friendly REST API with real-time and historical currency exchange rates for world currencies and cryptocurrencies.