Great update, the feature list has come a long way..
Penalty fade is just great, and puzzle selection was much needed, but it doesn't seem to hide the puzzles on the timer screen..
There are a couple of design things that aren't that much of a deal, still, here they go:
When opening the app or going to the timer from settings or history, leaves the 'Ready' text on its default size; when the session is reset, it is displayed correctly..
Using the two rows display, updating seconds only, both running and stopped states are vertically centered, so when tapping to stop, the seconds counter jump up and make room for the milliseconds.. Both states should be aligned on top, so stopping just make the milliseconds appear under the updating time..
Also regarding the two row display, selected text size doesn't match with either of the two rows.. Maybe the top/bottom size ratio could be customized too?
I don't know if its the font or what but, doesn't the 1s seem/look/feel uncentered?
And of course, a couple feature of suggestions:
Session delete warning dialog..
Session counter on the history puzzle select..
Solve count on history list/graph..