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it's because those apps are only designed for built-in android ir and not for headphone jack diy infrared sensors. this app seems to do the job well:https://play.google.com/store/apps/details?id=com.ir_remoter
that's what i did but instead of making this disk spinner i tried doing it while my cd player was reading and spinning the disc(and no it doesn't do any damage whatsoever but you need to be careful with the pressure you apply to it)
that's what i did