Hi, sorry for the length. Should this be on the help forum broken into many "ideas".
I had some thoughts on the interface/usability of the tracks screens.
1) The order of screens is not consistent.
When I start Locus Pro, and there is a track on the screen, pressing it and going to the information screen makes sense. But,
A) From the track list screen, pressing on a track takes me to its information screen. The Android back arrow goes back to the list screen (which it should - Good!).
If I go from the information screen and then to the map (via the bottom left button), then press the track on the map screen, I go back to the information screen. Okay, but I don't see how to go back to the list screen from the Info screen. The android back arrow now takes me to the map screen (logical I guess, but I want to go back to the list screen where I started). To get back to the list screen, it seems I need to 1) go back to the map screen and then 2) go to the data menu then 3) to the list of tracks folders, then 4) pick tracks list folder I was in. Now I am back at the top of the list, but not at the track I started from. I have to remember which track in the list I was looking at and then scroll to it. I would like the track list screen to be an anchor from which to browse back and forth to the map/info screens directly.
B) Similarly, from the track list screen, pressing the left side little map area, takes me to the map screen. Using the Android back arrow, I am asked if I really want to exit Locus (I don't). Now, pressing the track on the map screen lets me choose the track (if more than one item under my finger) which now takes me to the information screen (it should go back to the track list) with the same behavior as described above under A).
Basically, I want to look at several tracks in turn from the list without having to start over again and again by finding where I was on the list.
2) I would like an option to have Locus render the small maps on the track list screen without leaving the track list screen. Maybe, if one or more tracks are chosen (eyeball lighted), then there could be an option to render the small maps. Alternately, pressing the small map area could cause it to render, with a long press to the same area going to the map screen.
3) A track name cannot be fully seen on the list screen if it is too long. Only when the track is displayed on the map screen, is the name seen in full over two lines
4) From the track information screen, you can swipe to the right to go screen to screen until you hit the chart screen. Then this behavior stops swiping the chart screen has no effect, and to continue right, you have to choose "Laps" from the top of the screen. It would be consistent to be able to swipe the "chart" screen to get to laps screen.
5) The English wording on the laps screen if there is no data should read "Track cannot be separated into laps (it does not contain recorded values)"
6) In landscape on a phone (nexus 4), rather than on a 7" tablet, the "laps" screen has another new behavior - the first three left screens (info, statistics, chart) now are accessed by a drop down box. Again, better to keep all screens looking the same (unless Android causes this to happen automatically based on screen size)
7) Each interval could be numbered so

below is possible

Each interval could be marked on the map with a dot which under the center cross would show its number. Then I could analyze a part of the track from the map, instead of trying to find the lap I am interested in from the list of laps screen.
9) In an actual track (not sure if I recorded it in Locus or from other software) I see my max speed is 30.8. But, I have two laps showing higher speeds of 37 and 34 mph. I set the laps to be shortest length possible.
10) I use miles, not kilometers. The lap length options from the dropdown are .5mi, 1mi, 2mi, 5mi, 10mi. If I choose "Define", I am asked for a lap length in number of feet. Now I have to convert what I want to do, (say make it .2mi) into how many feet that is (.2 times 5280ft). Better to keep the define screen in miles so I can enter .2 mi directly.
11) If I have defined a lap length that is too small, then the 'error' dialog (showing me the smallest allowed length) should remain on the screen with an 'x' until I dismiss it. I missed the message the first time I defined an interval too small. Alternately, you could just set it to the smallest length allowed rather than what I asked for. I believe this is Locus behavior in setting track/route widths elsewhere.
12) Track List screen: The eyeball icon replacing the check box is interesting, but I'm thinking it might be better to keep the normal convention of check box, rather than introduce a new paradigm (I was confused)