Myanmar Money Reader works by using the camera on the back of your phone to recognize Myanmar Kyat bills and the default TTS installed on your phone to read aloud the value of them.
Make sure your phone is in portrait mode and your money is in landscape mode. Show the back of your money to the back camera of your phone.
Distance is important. You should try to find the right distance to hold your phone away from the money. Every phone is a little different.