Yjs VS RepDB
Compare Yjs VS RepDB and see what are their differences
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Yjs
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Automerge
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.
Yjs 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, Yjs seems to be more popular. It has been mentiond 26 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.
In the architecture of my Collaborative-Code-Editor, choosing CRDTs over OT gives me the advantage of not depending on a server for my data conflicts. Using Yjs as my CRDT library, not only fixes the problems OT arises but comes with additional features. A unique identifier keeps track of the characters' identity, and relative addressing that points to the character position in my code editor. The relative... - Source: dev.to / 2 months ago
Highly suggest you take a look here: https://github.com/yjs/yjs CRDT can absolutely do what youโre asking. - Source: Hacker News / 3 months ago
``` Those commands create and move real files that immediately appear in the editor's file tree. The best part is that all of this works in both browser and server-side contexts, since yjs (https://github.com/yjs/yjs) is isomorphic. Under the hood, metadata (name, parent, timestamps) lives in a versioned CRDT table. Document content lives in a separate Y.Doc per file, so the directory index syncs without pulling... - Source: Hacker News / 4 months ago
Libraries like Automerge and Yjs have gone from academic curiosities to production-ready tools. They handle edge cases that would have made local-first apps unreliable five years ago. - Source: dev.to / 4 months ago
I really like these sorts of frameworks from an architectural perspective, but what's the use-case? Maybe I'm too SPA-pilled, because to me all the fun of Web development is in providing really fluid, skeuomorphic experiences like those enabled by, eg pragmatic-drag-and-drop[0] or yjs[1]. I just struggle to envision what application benefits from the efficiency that this or htmx offer, but from neither the... - Source: Hacker News / 5 months ago
GUN - Self-hosted Firebase.
RxDB - A fast, offline-first, reactive Database for JavaScript Applications
Liveblocks - Build amazing realโtime collaborative products
Reflect.net - High-performance sync for multiplayer web apps. Up to 120 FPS sync, automatic persistence, server authority, fine-grained auth, and more...
Thymer - Web-based Project management and task planning for people who hate project management and task planning. For individuals, teams and small businesses.
ShareDB - Realtime database backend based on Operational Transformation (OT)