Like other audio players uPod utilizes the Presto sound library to implement playback speed control, meaning you need to install a 3rd party app to make playback speed control available in uPod. In the meanwhile there are a few implementations of the Presto API available at Google play! (alphabetical order):
- Prestissimo: open source and available for free for Android Jelly Bean (4.2) and above
- Presto Sound Library Open Beta: commercial
- Stable Speed Library: commercial
I have mostly tested with Prestissimo, so it is uPod's preferred implementation. Please let me know if I am missing an app here.