What are some alternatives?
When comparing Tweetbot and XE.com, you can also consider the following products
TweetDeck - TweetDeck is your personal browser for staying in touch with what’s happening now.
Elk - The fastest way to convert currencies on mobile.
Twidere - Tired of seeing ads and promotions in your timeline, being disrupted by tweets from bots and people...
Unit Wolf - Unit conversions and calculator.
Birdie - The New Album Out Now featuring the single Keeping Your Head Up.
ConvertAll - A comprehensive unit conversion program.