The current iteration of the Shotgun Review iOS app allows you to scrub the timeline with your finger back and forth. Depending on the size and length of your clip, it can become difficult to carefully step through certain Versions frame-by-frame. This feature request is to add a means by which to carefully scrub backwards and forwards a frame at a time.
One possible way to do so would be to add step buttons on either side of the timeline to go one frame forward or back with a single tap.
Would this be useful to you? If so click the "Me Too" button, and let us know your thoughts and suggestions for how to accomplish this feature in the comments.