Samsung Galaxy Tab 4 Model SM-T530NU I am trying to use Anovia Cred Card Swiper

[AC Question]

The Tab 4 shows CC Swipper plugged into headphone jack, but it says I need to go into setting for microphone permissions, what gives?

 

[B. Diddy]

Welcome to Android Central! Have you checked the app's settings menu? Or go to Settings>Device Administrators​, and see if the app is listed there--if so, check it on.