In the Android app, many of the menus and text items are in a light weight don't in grey, and make the text difficult to read, and causing significant eyestrain. If there is not any way to make all text high contrast and roman or book weight,there should be to comply with the Americas with Disabilities Act.
I agree with crafty's assessment. The iOS app folder names are a light gray while the actual entries are in bolder type. This makes it difficult to quickly scroll through the folder list to find an entry. It's a small but irritating thing and it wouldn't be hard to fix.