Aimchess
Chess.com
Lichess
DecodeChess
Chessvia.ai
ChessMonitor
Noctie.ai
Chessigma
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.
Aimchess 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, Aimchess 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've been subscribed to Aimchess premium for a month now and have been using it daily as a means of studying chess, here's my review. Source: almost 3 years ago
I think that maybe aimchess.com might attempt that but I've never used it. Their claim is "Aimchess helps chess players like you improve faster by combining unique analytics with personalized lessons (created from your games!" but I have never tried it. Source: over 3 years ago
I'm pretty sure aimchess.com does this actually. If you go to analysis board and start making moves they'll show videos and courses that include the poisition you inputed. Source: over 3 years ago
Aimchess has a mode for practicing visualization, but I haven't used it extensively. Source: over 3 years ago
This AMA has been organized by chess24 to celebrate Anish Giri becoming an official Play Magnus Group ambassador. The Play Magnus Group is the home of chess24, Chessable, Meltwater Champions Chess Tour, Aimchess and more. Source: over 4 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.
DecodeChess - AI chess tutor and analysis
Chessvia.ai - Chessvia AI offers a revolutionary chess experience with Chessy, your personal AI chess coach that speaks, listens, and adapts to your style.
ChessMonitor - Analytics for Chess Players: Played games, openings, win rates, ratings, opponents and more statistics for chess players.
Noctie.ai - Practice chess against a humanlike chess AI & coach
