For those of you who have tried the Coach's Eye app but want more extensive features, the 'Kinesio Capture Basic' app is definitely the choice. Although it's more expensive ($10.49), It is a great way to show a skill and for athletes to analyse their own performance, or for coaches / teachers to show a comprehensive breakdown of a skill.
As well as the split screen analysis that a lot of the apps now have, it also include a video overlay feature where you can put one video over another, as well as an in app measurement tool where you can measure angles. The video overlay feature is definitely worth trying!
The app also comes with two other versions, Kinesio Capture Pro (Free but you need to pay for the 'Kcap Pro' account through their website) and Kinesio Capture ($269.99).