Nope, i have used mobizen without a computer, what recording option did you use? You may be missing a plugin as that could be why you need a computer. I will check the Q&A thread if mobizen has one. I dont think you reqiire "booster mode" to record the screen.
Edit: Android 4.0 higher is required for mobizen, from the website...
Whats youre Android OS version?
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