Cool app -- but needs an ad-free version – Swift Chess: Endgame Puzzles Review

Strangely, the "Lite" version of this app is ad-free but expires after 48 hours. Which means the non-lite version costs nothing but bombards you with ads -- including ads that interrupt your endgame challenge while you're still trying to solve it. (For instance, if your endgame requires 6 moves you may get an ad after 2.). I've suggested making the regular version the Lite version and offering a regular, ad-free version for a couple of bucks, but I have no idea whether the maker will listen to reason. Anyway, if you want to work on your endgame skills this is a fun way to do it ... assuming you can stand having ads interrupt your train of thought.
Review by Mind The Rant on Swift Chess: Endgame Puzzles.