An Aimchess alternative focused on your own mistakes
Aimchess and Blunderbase both use your games to guide practice. Aimchess offers a broader range of training activities; Blunderbase centers on reviewing your games and returning to your own mistakes.
Where Aimchess is a good fit
Aimchess advertises analytics across six aspects of play, comparisons with similarly rated players, personalized study plans and multiple lesson types. Its catalog includes opening, visualization, time and endgame exercises. Choose it if variety and a broad overview of your play are what keep you practicing. See Aimchess’s own feature list.
Where Blunderbase takes a narrower approach
Blunderbase starts with a completed Rapid or Blitz game. Stockfish finds the significant mistakes; you replay the game, test alternatives and practice the flagged positions. Those personal puzzles return on a schedule, with a missed position coming back sooner.
Pro adds one evidenced weakness, three short practice sessions and a comparison with five newly played, analyzed games. It can report that the pattern appeared less often, more often or about the same. It also says when there is not enough evidence. That comparison is not proof that practice caused a rating improvement.
Free access and paid plans
Aimchess lists a free Standard plan with one forty-game report a month, a weekly study plan and a daily core training session. Premium is listed at $7.99 monthly or $57.99 billed annually, with expanded reports and training. These are the prices displayed on its public pricing page when checked; verify the checkout before subscribing.
Blunderbase’s review, personal puzzles, scheduled practice and progress are free, with ninety days of import history. Pro costs $4.99 a month or $39 a year. Alongside the weekly program, it includes automatic imports and twelve months of history. Compare Free and Pro.
What you would give up or keep
Blunderbase has no peer-rating benchmark, comparable broad lesson catalog or claim of a proven rating gain. Analysis needs the app open. Game Review provides an engine-based explanation rather than an AI chat. If those limits remove something you use in Aimchess, staying there may be the better choice.
To try Blunderbase, create an account and import your Chess.com or Lichess username. There is no direct transfer of Aimchess reports, study history or subscription. You can evaluate the example review and the free workflow first.
Comparison checked on September 12, 2026. Blunderbase is independent of Aimchess.
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