Originally Posted by jswinden
Not if you like to sync between devices. There are some 3rd party ways to sync, but they are all clunky compared to using Whispersync. If syncing is not an issue, then there are many alternate eReading apps available for ePub, but none worth a crap for mobi.
Apps like Kindle, Nook, Kobo, etc. excel in syncing and dictionary lookup, but are lacking when it comes to format options. 3rd party apps are lacking in syncing, dictionary lookup, etc., but they often have more formatting options. Choose your poison...
I noticed you have a Kindle Fire. Does the Fire reader have more formatting options?