The matter was first reported on Reddit after which many users claimed they had fallen victim to it.
The Hong-Kong-based creators apologised for the fault and confirmed that the problem had been fixed.
"This cache file currently remains on your phone instead of deleting itself once your session is finished. Also, when the file is created it overwrites itself (no new files are created)," a representative from the company told The Mirror.
One of the users who initially spotted the problem said there was a six minute recording of the last time they used their toy.
They added: "I was going through my phone media to prepare it for a factory reset and came across a .3gp file named 'tempSoundPlay.3gp' in the folder for the app. The file was a full audio recording six minutes long of the last time I had used the app to control my [partner's] remote control vibrator.
"At no time had I wanted the app to record entire sessions using the vibrator." (ANI)