
Chessable
Chess.com
Lichess
Chess Tempo Database
Aimchess
Chessvia.ai
DecodeChess
Noctie.ai
RepDB
RepDB is a one-time-purchase exercise dataset for developers building fitness and workout apps โ not a subscription, not a rate-limited API. You download the data once and own it: JSON (and SQLite on the higher tier), WebP images, and full EN/DE/ES translations, with no per-request billing and no dependency on our servers staying up.
A free tier includes 250 exercises with flat-style 512ร512 images, attribution-licensed for commercial in-app use. The Starter tier ($199) adds the full catalog in classic white-background style. Standard ($399) adds transparent 1024px images, looping animations, exercise relations (similar/progressions/regressions), workout templates, and embeddings โ exclusive to that tier.
Every exercise includes muscle-group highlighting, equipment/muscle icons, MET values, and safety/goal tags. Compared to GIF- or JPG-based competitor APIs, RepDB images are transparent WebP with no watermarks, so they drop into any app UI without a white box around them.
Chessable
RepDBRepDB's answer:
RepDB is sold as a one-time download, not a metered API โ you own the JSON/SQLite data and WebP images outright, with no rate limits, no per-request billing, and no risk of the vendor cutting off access. It's also the only dataset in this space with EN/DE/ES translations, transparent (alpha-channel) images with no watermark, muscle-group highlighting, safety/goal tags, and looping animations on the higher tier.
RepDB's answer:
RepDB grew out of a consumer workout app its creator was building solo. Sourcing exercise images and data meant either paying for a subscription API with usage caps and no caching rights, or producing everything from scratch. The illustrated, multi-language dataset was built for us first, then split out as its own product once it became clear other indie developers had the same problem and preferred to buy the data outright rather than rent it through an API.
RepDB's answer:
Most alternatives are subscription APIs โ you pay monthly, you're capped on requests, and ExerciseDB's terms of use explicitly forbid caching or storing the data at all, so every image render is a live paid API call. RepDB is the opposite: pay once, download the files, self-host with zero ongoing dependency. It's also the only option offering true DE/ES localization and transparent images instead of a white box behind every exercise.
RepDB's answer:
Solo developers and small teams building fitness or workout-tracking apps (iOS, Android, web) who need licensed exercise images and structured exercise data, but don't want to build their own media pipeline or depend on a rate-limited third-party API.
Based on our record, Chessable seems to be more popular. It has been mentiond 20 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I think its saying that because at chessable.com it said that knight has 3 points and rook has 5 points you take back but rook is still better than knight and the game thinks that promoting to queen isn't gaining any material. Source: about 3 years ago
Chessable: Interactive chess books. Some recommended courses:. Source: over 3 years ago
Chess.com membership on TOP. Get the gold one. Not the platinum. Chess.com already gives you a way to analyze. I don't see why you need an engine to say if the move is good or bad when you literally can analyze on your own. The lessons are very good. Some go over fundamentals that gothamchess courses have (Middlegame masterclass, beginner course, and intermediate course). Also while chess.com lessons doesn't have... Source: over 3 years ago
Would someone be open to giving feedback on end-game principles or ideas I should have thought about or be thinking about in this position? I've practiced end games pawns verse pawns and such on chessable.com but I think im missing some "known theory" that my opponents have from chess coaches/years of experience heh. Source: over 3 years ago
But in the end, if I'm going to buy a book, I prefer a book that is a book that doesn't contain a lot of analysis, and teaches you the basics of chess. For that purpose I recommend Chessable, and the other one, Chessable. Source: over 3 years ago
Chess.com - Play chess on Chess.com
Lichess - The complete chess experience, play and compete in tournaments with friends others around the world.
Chess Tempo Database - Chess Tempo Database gives you a library of more than 2 million searchable chess games.
Aimchess - Learn chess your way with AI tools and data driven approach.
Chessvia.ai - Chessvia AI offers a revolutionary chess experience with Chessy, your personal AI chess coach that speaks, listens, and adapts to your style.
DecodeChess - AI chess tutor and analysis