2stars only because it’s free! – Memphis Chess Club: A History of Problems Review

Abrupt quits are frequent, and the solver can’t produce hints or solutions for any of the mate-in-7 problems. So it’s good for all the problems up to mate in 6, which is good enough practice. It’s entirely possible that more powerful iPhones will support this app completely, so if you have an 8 or higher give it a try!
Review by druariel on Memphis Chess Club: A History of Problems.