Spaced repetition, on the board
A move you play right comes back in 1, 3, 9, 21, then 60 days. A move you miss comes back at the end of the session and again tomorrow.
Your repertoire, White or Black
Start from a ready-made opening, or bring your own: a PGN file or a Lichess study. Only your side's moves are trained.
Explore, then spar
Walk your lines with the author's comments. Then play the opening against Stockfish, which runs on your phone, offline.
Private by default
No account, no ads, no analytics. Your openings and progress stay on your phone. Privacy policy