Cricket Bowling Smartphone Apps

I am interested in people's experiences with any cricket bowling smartphone apps - specifically which ones they have used or been recommended, what has or hasn't worked on them and what other features people are looking for on an app for bowling to be able to improve their bowling technique or reduce injury risk. We are also talking with some elite level coaches on the same topic and have already spoken with Ramesh Ratnayake (former Sri Lankan National Coach), Richard Pybus (former Bangladesh National Coach and current West Indies National Coach) and Muttiah Muralitharan (no need to give credentials here!).

If anyone would be prepared to have a 10min phone call about it as well, that would be great - can just PM me and we can line it up. Am definitely not selling anything, just looking for background information.

Cheers, AndrewL