
Authorizer
TypingDNA Authenticator
Amazon Cognito
Keycloak
LoginRadius Authentication
Auth0
Stack Auth
Authpack
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.
Authorizer
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, Authorizer seems to be more popular. It has been mentiond 9 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.
Authorizer takes "your data" seriously. - Source: dev.to / 9 months ago
In this post, https://authorizer.dev was chosen as the authorization server, but the principle of working with other authorization servers is approximately the same and the additional code that was written on the frontend and backend will not differ much. - Source: dev.to / almost 2 years ago
In the next post, I will connect an external authorization server https://authorizer.dev to the project... - Source: dev.to / almost 2 years ago
Open source authentication and authorization solution for your APIs, which is database independent. Https://authorizer.dev. Source: over 3 years ago
Hello people, on 3rd November 2022 I had amazing opportunity to speak at AWS community (Vadodara) event happening in my city. I presented on using Authorizer with DynamoDB and EKS. - Source: dev.to / over 3 years ago
TypingDNA Authenticator - 2FA codes in your browser, secured by the way you type
Amazon Cognito - Amazon Cognito lets you add user sign-up, sign-in, and access control to your web and mobile apps quickly and easily. It scales to millions of users and supports sign-in with social identity providers and enterprise identity providers via SAML 2.0.
Keycloak - Open Source Identity and Access Management for modern Applications and Services.
LoginRadius Authentication - Secure and robust authentication, SSO with user management
Auth0 - Auth0 is a program for people to get authentication and authorization services for their own business use.
Stack Auth - Open-source Auth0/Clerk Alternative