Polygonjs
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Three.js
Three.js Journey
Lottie
PlayCanvas
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Houdini
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.
Polygonjs 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, Polygonjs seems to be more popular. It has been mentiond 138 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.
- some corners will connect less than 4 tiles. This does the opposite of the previous point, as this removes diagonals. This limits your moves in a specific direction, but can also protect you from your opponents. It's the kind of features that can be used both as a defense and as attack. And the boards are procedurally generated, so you can play unique games each time (or you can re-use the same boards if you... - Source: Hacker News / over 2 years ago
That's the path I took with Polygonjs ( https://polygonjs.com ), and a game I've just released ( https://polyreplay.com/minesweepertwist ), with more coming shortly. But it didn't start like that. It only started as a tool I could use to deliver client projects, as I was trying to become a freelance for interactive 3D scenes for the web. Project after project ( some examples here: https://polygon-lab.com/ ), I... - Source: Hacker News / over 2 years ago
I'm building one, called Polygonjs ( https://polygonjs.com/ ), you have a few examples to play with ( https://polygonjs.com/docs/examples ). - Source: Hacker News / over 2 years ago
You can have a look how I do it in Polygonjs (which is a node-based design tool based on threejs), in this example scene. Source: over 2 years ago
If you're familiar with Houdini, I invite you to try Polygonjs, which is based on threejs and inspired by Houdini. You can basically build threejs in a procedural way, with just nodes. Source: over 2 years ago
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