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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 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.
33Mail RepDB33Mail is recommended for individuals concerned about privacy and spam protection, users who frequently sign up for online services, and anyone who wants to manage and control the number of marketing emails and unwanted messages they receive.
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, 33Mail seems to be more popular. It has been mentiond 16 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.
Iโve been a happy customer of https://33mail.com/ for years. Itโs a different style of offering with a similar purpose and apparently a sustainable business model. - Source: Hacker News / over 3 years ago
Https://33mail.com may be what you're looking for, custom domains need premium subscription. Source: over 3 years ago
If you are interested in the "unlimited unique private email addresses" functionality, also take a look at these other services: https://33mail.com/ https://anonaddy.com/ https://burnermail.io/ https://relay.firefox.com/ https://simplelogin.io/ These all support custom domains, except for Firefox Relay, which only supports a custom subdomain. - Source: Hacker News / almost 4 years ago
There are a couple of websites that let you do this without running your own email server. https://33mail.com is one, for instance (disclaimer: happy customer here.). - Source: Hacker News / about 4 years ago
I recommend setting up an account on 33mail.com and linking it to the burner email address that was created in step 2. With 33mail, you get an unlimited number of email aliases (the stuff before the @ symbol) and you can turn them on and off at any time. For example:@.33mail.com is the formula for their emails. is something that you set up when you create your 33mail account and is unique to... Source: over 4 years ago
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