Seems like a good app

This plays back videos in adjustable slow motion and can do frame by frame forward and backwards. You can compare two videos side by side and link them to play together, nice feature. It just has a couple bugs on my iPad that need worked out and I would pay for it and rate it 5 stars. Very nice for golf swing analysis, better than v1 golf.

Whisper3413 about Slowmo - SlowMo Video Analysis