This is probably an unexpected reply, but I use RManager(It's free!)
It has great smooth playback, and best of all, you get free Dolby DTS decoding. It works great with my x265 HEVC videos too, plus SMB support for my router.
Infuse is fantastic too.
Haha I wasn't advertising. It's not my app!I checked your app details in Store. It gets well designed. But it only gets one review. I suppose you need to boost it with many organic installs and positive reviews, besides posting here. It will rank your app top and will drive more new users to your app.
Wish you luck!
nPlayer (my choice)
These two are constantly upgraded and have been pretty consistent over the years. If you really want to stay on iOS, forget about the hefty price. Any of these two are worth the price. Both have free versions, so you can always try before you decide.
So do I NOW. I made a suggestion here:I have both nPlayer and Infuse now.
I would like to share my own experience as i have tried a great many media player apps including infuse, mx player, vlc, oplayer on iOS and wasn't satisfied as i faced a lot of issues with every single one of them. That's when i found the PlayerXtreme media player app and I haven't faced an issue since. Its the best media player for iOS as its totally free and supports all formats so i don't have to convert any files. Plus it also has a lot of cool features which make the overall experience even more enjoyable. PlayerXtreme is also available on Android devices and Apple TV.
Can apps be free and still decode AC3? I thought app developers had to pay a licensing fee for that functionality?