This app is useless. After waiting for hours, my m4a audio file was NOT converted to an MP3 copy. First of all, unless you are willing to wait an unnecessarily long time for them to convert your audio, you have to pay $4.99If you choose not to pay, be prepared to wait at least 90minutes for your file to be converted. Both of my attempts seemed to take longer. When I converted the 30 second m4a file it turned into a 20 second MP3 file some 2 hours later. This removed 10 seconds of critical audio. I verified that my original file was ok before trying again. Some 2 hours later I had the same issue.As a side note, I felt that it was asking for too much access to my gmail account, with reluctance I gave them, what I felt was too much, access to my google drive account. Ultimately, this app proved to be a waste of my time and a waste of my phone storage. Deleted.