I was looking for the ScreenChomp app because I wanted to create a whiteboard drawing video, and it was recommended on several articles. Unfortunately, those were older articles. ScreenChomp app was discontinued at the end of August 2016 and it went dark.
Excerpt from the TechSmith official announcement at https://feedback.techsmith.com/techsmith/topics/screenchomp-end-of-product-support-announcement
ScreenChomp – End of Product Support Announcement
Thanks for using ScreenChomp, our experimental Labs app for creating bite-sized video nuggets. We’ve valued your participation with this application, and learned quite a bit through hearing about how the app has been used by both students and teachers in the classroom.
However, support for ScreenChomp will be ending on 8/31/2016. Moving forward, we will be increasing our focus on the solutions which are making the most impact for our customers, including Snagit and Camtasia.
ScreenChomp will be removed from the app store on 6/14/2016, after which time you won’t be able to download or re-install the application. If you already have ScreenChomp installed, you are welcome to continue using it as usual until the final retirement on 8/31/2016, at which time sharing will be disabled.