Software Alternatives, Accelerators & Startups

Reflect.net VS RepDB

Compare Reflect.net VS RepDB and see what are their differences

Reflect.net logo Reflect.net

High-performance sync for multiplayer web apps. Up to 120 FPS sync, automatic persistence, server authority, fine-grained auth, and more...

RepDB logo RepDB

Exercise dataset for fitness apps: transparent background, animations, no subscription
Visit Website
Not present
  • RepDB
    Image date //
    2026-07-21
  • RepDB Landing page
    Landing page //
    2026-07-21
  • RepDB
    Image date //
    2026-07-21

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 512ร—512 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.

RepDB

Website
repdb.co
$ Details
freemium $199.0 / One-off
Platforms
Web Mobile
Release Date
2026 July

Reflect.net features and specs

No features have been listed yet.

RepDB features and specs

  • WebP Format Benefits
    start+peak exercise images
  • JSON
    relations, metadata, equipment
  • Transparency
    transparent background
  • Animations
    Animated loops in paid tier

Reflect.net videos

#2 โ€“ Aaron Boodman: From Google Gears to Replicache & Reflect.net

RepDB videos

No RepDB videos yet. You could help us improve this page by suggesting one.

Add video

Category Popularity

0-100% (relative to Reflect.net and RepDB)
Developer Tools
70 70%
30% 30
Datasets
0 0%
100% 100
Databases
100 100%
0% 0
Project Management
100 100%
0% 0

Questions & Answers

As answered by people managing Reflect.net and RepDB.

What makes your product unique?

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.

What's the story behind your product?

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.

Why should a person choose your product over its competitors?

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.

How would you describe the primary audience of your product?

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.

User comments

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Social recommendations and mentions

Based on our record, Reflect.net seems to be more popular. It has been mentiond 3 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.

Reflect.net mentions (3)

  • Automerge: A library of data structures for building collaborative applications
    In a recent (abandoned) project, I used Reflect: https://reflect.net/ It was by far the most developer-friendly experience I've had trying to implement collaborative editing. The one thing it didn't have that YJS did was built-in undo/redo. - Source: Hacker News / about 2 years ago
  • Are Sync Engines The Future of Web Applications?
    Crazy plot twist (last minute edit): As I was about to publish this post I discovered that Replicache is going to be opened sourced in the near future and that its parent company is planning to launch a new sync-engine called "Zero". Here is the official announcement. It reads: "We will be open sourcing Replicache and Reflect. Once Zero is ready, we will encourage users to move." Ironically, Zero seems to be yet... - Source: dev.to / about 2 years ago
  • How I built a Multiplayer App in 3 days
    As the Monday began I started reading documentation and looking into the tech I wanted to use. For most of the stack I went with things I know. But for the multiplayer part I had to read up and understand the core concepts behind Replicache. While reading I came across their hosted service Reflect. This was a perfect fit as time was of the essence and I would not have to build my own Replicache backend! It's... - Source: dev.to / about 2 years ago

RepDB mentions (0)

We have not tracked any mentions of RepDB yet. Tracking of RepDB recommendations started around Jul 2026.

What are some alternatives?

When comparing Reflect.net and RepDB, you can also consider the following products

Liveblocks - Build amazing realโ€‘time collaborative products

Baselime - Observability & error tracking for cloud applications

Hacker News Search - a faster hnsearch

Excalidraw - Excalidraw is a whiteboard tool that lets you easily sketch diagrams that have a hand-drawn feel to them.

Automerge - A JSON-like data structure (a CRDT) that can be modified concurrently by different users, and merged again automatically.

Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.