Take " Performance Test Mobile " free app from App Store, or search for Benchmark Apps
please read viewtopic.php?f=183&t=47261
about disk performance / speed issues.
>I have 5 GB left on my iPad.
Yes, should be enough for normal mixdown 44 khz / 16 bit.
1. wich samplerate / bit rate you are using ?
2. wich mixdown features you are using ?
3. How many tracks, audio,midi etc and how long they are ?
4. micrologue, microsonic, insert Plug ins, send plugins etc ?
5. How is your Disk "Storage Write" performance in MByte/Sec
6. Is your disk regularly full and you need to delete files or Apps for free disk space to work with cubasis ?
Please send us an step by step description to repro.
Currently we can't reproduce it here.
>But when rendering the progress bar just stops and won't move or finish.
Maybe you are waiting not long enough, and the progress is running on background.