Mixdown as MP3 in iOS

[fahri]

Hello,

I have recently switched to an iPAD and after some days of use I missed terribly my favorite DAW from android so I have installed AEM

However I ran into this problem where I try to a mixdown I can get only WAV files as an output.

Also the dedicated program "Garage Band" only gives out M4A files. Is this a limitation in iOS or am I missing something ?

Thanks
Fahri