Images, however, may not be enough when trying to demonstrate something. Mobile operations such as setting up proxy servers on the iPhone or accessing hidden files on the Android may be complicated for some. So it’s better to provide people with video walkthroughs when trying to show how to accomplish something on their phone.
Screencast and Recorder – Best Screen Grabber App For The Android
Screencast for Android records your phone screen activity at high frame rates into a high quality MPEG4 video. This program includes a gallery to view, play, rename, delete and share your previously recorded videos from within the same user interface.
Note: You need to root your Android device to get this working.
For iPhone or iPad, there's not such an app that works similar to ScreenCast for Android. But there's a workaround for this. ScreenSplitr is an iOS app that mirrors your iPhone/iPad screen on a computer. Using SnagIt or any other video screencast tool for PC, you can then record screen activity on your iPhone and save it as video file. For more information, visit here. Below is a short clip that best describes what ScreenSplitr is and how it works: