OpenMaps for iOS

I love the download feature for use without a network connection. Three further ideas for it:

1. Let me specify the shape of the download area. That would seem useful for 'long' cities along a river or at a coast. Particularly when their direction is along the short edge of the screen and a high detail level is required this could decrease the download size and the amount of storage space required.

2. I find it hard to get a feeling for the parts of the map I have already downloaded. Perhaps some overlays over the map indicating the border and detail of the downloaded tiles would be helpful.

3. I find the slider for selecting the Download detail level a bit hard to use because my finger tends to obscure the numbers displayed above the slider which makes it hard to read them while changing them. Perhaps a alight rearrangement could improve that?