Mobile can create it’s own set of problems because from a design standpoint it is still considered a single app at a time device. This can present problems when trying to record the interface during user testing.
First a few caveats:

  • If you have no budget for software (e.g. you are trying to prove UX is needed) CNET has a good run down of how to record the iPhone screen using quicktime(CNET)
  • If you are recording webpage interaction (does not work for apps.) UX recorder will work. (Company website)
  • if you need Windows mobile you are stuck with Project my screen

Of course the most important thing is ease of setup and use by the administrator (setup, video retrieval) and test participants (setup for remote testing). Secondly, cost, since some of these apps need to be purchased for each participant in the case of remote testing. Cross-platform is better to be able to standardize results.
The features I was looking for were tap recording, ability to make calls during recording to test call based apps, and high enough performance to not cause lag. Privacy was also a concern since mobile devices have access to personal information so it helps to shield responsibility to not collect too much info.
The apps tested:
Android

  • Recommended Join.me
  • Recommended Mobizen
  • Recommended Teamviewer
  • GoToAssist
  • Mirrativ
  • Remote Call
  • Screen Stream Mirror
  • VNC
  • Vysor
  • Youtube gaming

Apple

  • Recommended Zoom
  • Air Server
  • Lonley Screen
  • lookback
  • Quicktime
  • X Mirage

Cross Platform

Whatever tool you decide to use remember: Plan ahead, test with multiple co-workers first, always have backup tests and questions incase something fails, and if you are doing remote testing, then unfortunately tech savvy participants are about the only way you will get testing data back since they will need to be able to at least install an app.