I like this app. I'm running the Android O beta on a Pixel phone and I've had no problems using the app. Generally I store mp3s in my Google Drive folder, then download the MP3 to my phone. The app finds the MP3 with no assistance from me. It quickly creates the ringtone and from within the app let's you set it as your ringtone.
I think it must be more sensitive to improve cutting mp3 files which helps in making good ringtones
Nice one.. easy to cut the songs where ever you want.. very easy for me every one
Great app and easy to use! Accurate song editor!
Great app, simple yet powerful.