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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.
Inspect 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.
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The only thorough solution here is to actually get a Mac, but there are tools to help you - this isn't free but there is a trial - https://inspect.dev. Source: over 3 years ago
Ive used this with some success - https://inspect.dev/. Source: about 4 years ago
You can half ass it with https://inspect.dev/ , it's janky as hell because it tries to map the chrom debug tools onto whatever pitiful serial link Safari provides and has no guarantee it won't get nuked by Apple with the next update. But it was how I debugged a PWA that had issues only on iOS (whadda you know, they broke a new thing in IndexedDB!). Source: over 4 years ago
Similar tools are available with Safari and Mac OS. If you're trying to debug an iOS device from Windows/Linux, try https://inspect.dev/. Source: over 4 years ago
I built http://inspect.dev, a new developer tool for macOS, Linux, and Windows to inspect and debug your mobile web apps and websites on iOS devices. Crossed $1000+ MRR pretty quickly and it's been growing organically since. - Source: Hacker News / over 4 years ago
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