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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 400 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.
Sails.js RepDBSails.js is recommended for developers and teams looking to build enterprise-level applications, startups that need to rapidly prototype and iterate on real-time applications, and any development projects that require a powerful, flexible API system. It is especially suitable for small to medium-sized projects that wish to leverage Node.js, and those who appreciate a comprehensive framework that can provide rapid development and robust feature sets.
RepDB'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, Sails.js seems to be more popular. It has been mentiond 27 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.
He's building js apps with https://sailsjs.com ? - Source: Hacker News / 10 months ago
I haven't used either so I can't chime in on that front, but long ago I was pretty into Sails which is written by a team that loves rails, but switched to NodeJS so it's basically Node on Rails. I actually thought they discontinued it, but I just searched and it still exists. It was a solid framework like 5 years ago when I used it last so I assume it's quite mature now. https://sailsjs.com/. - Source: Hacker News / about 2 years ago
Sails is a realtime JavaScript framework built on top of Express. Sails offers built-in realtime communication support and a flexible routing system. - Source: dev.to / over 2 years ago
Sails is a realtime MVC framework for NodeJS built on top of Express. Sails has a flexible routing system and comes with built-in realtime communication support. - Source: dev.to / over 2 years ago
Sails.js: Sails.js pitched itself as the MVC framework for Node.js, bringing a Rails-like experience while being database agnostic. - Source: dev.to / almost 3 years ago
ExpressJS - Sinatra inspired web development framework for node.js -- insanely fast, flexible, and simple
Koa.js - Next generation web framework for node.js
hapi.js - Server Framework for Node.js
FeathersJS - Wow your users. Build incredible real-time applications in record time.
Nest.js - A progressive Node.js framework for building efficient, reliable and scalable server-side applications.
AngularJS - AngularJS lets you extend HTML vocabulary for your application. The resulting environment is extraordinarily expressive, readable, and quick to develop.
