if your on iphone or ipad witbound basically does what whispersync does but its your m4b and epub files

witbound over whispersync anyday to behonest. its on the appstore only though

i kind of use witbound instead of whispersync. it was one time purchase and now i get sync my m4b and epubs together and not be locked on whispersync.

i kind of use the witbound on the app store, my own files epub and m4b instead of being locked using whispersync.