Works fine

This works fine if you follow the directions. The interface is not super intuitive, and you need a PC or mac to actually move the MP4 file you create back to your phone as a ring tone.
The adds are annoying.
You can scale clip length by dragging the edges of the top box. You can move the selection box by pressing in the middle and dragging it.
The bottom box is for adding fade points. You can tap along the time line to add extra manipulation points. Most folks dont use any of that and it makes it seem more complex then it actually is. The people saying it doesnt work though? Idiots.

Bushibot about Ringtone Editor Pro, v2.1.1