Better than iBooks but still has problems
I tried this app when Apple botched up the switch of audiobooks from iTunes to iBooks in IOS 8.4. This app was recommended by some users on the Apple forum regarding the iBooks problems, so I tried it. It is definitely better than iBooks since it does remember where you stopped listening. It does have one annoying problem however. The books I listen to are ripped from CDs borrowed from my local library. I use Audiobook Builder to create an audiobook file. Using this process each track on the CD is converted into a chapter in the audiobook file. Every time MP3 Audiobook Player starts a new track or chapter it plays a few words, pauses a second and then repeats the same few words. This destroys the smooth flow of the book especially with books formatted with 99 tracks to a CD. I found this so annoying I stopped using the app. Users on he Apple forum also recommended the Audible app. I tried that and it works fine. It plays any audiobook on my iPhone, not just those purchased from Audible.
Killerlover about
MP3 Audiobook Player