Company Chess King created these great apps:
Chess Study: PDF PGN Pro, Karjakin - Elite Chess Player, Chess: Capturing Pieces 2, Chess: Capturing Pieces 1, Chess Strategy for Beginners, Mate in 2 (Chess Puzzles), Chess Tactics. Sicilian Def 1, Chess Opening Lab (1400-2000), Chess Tactics Art (1400-1600), Chess Tactics in Grunfeld Def, Chess Tactics in Scandinavian, Chess Tactics in Open games, Chess Tactics in Kings Indian, Chess Tactics in Slav Defense, Chess Tactics in Volga gambit, Wilhelm Steinitz - Chess Champion, and others..
img
img
img
img
img
img
img
img
img
img
img
img
img
img
img
img