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Rellax.js VS RepDB

Compare Rellax.js VS RepDB and see what are their differences

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Contents:
  1. ยป Base Details
  2. ยป Videos
  3. ยป Reviews
  4. ยป Alternatives

Rellax.js logo Rellax.js

Lightweight, vanilla javascript parallax library

RepDB logo RepDB

Exercise dataset for fitness apps: transparent background, animations, no subscription
Visit Website
  • Rellax.js Landing page
    Landing page //
    2021-10-07
  • 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.

Rellax.js

Website
dixonandmoe.com
Pricing URL
-
$ Details
Platforms
-
Release Date
-
Edit details

RepDB

Website
repdb.co
Pricing URL
Official RepDB Pricing
$ Details
freemium $199.0 / One-off
Platforms
Web Mobile
Release Date
2026 July
Edit details

Rellax.js features and specs

  • Simple Implementation
    Rellax.js offers a straightforward implementation, allowing developers to easily add parallax effects to their websites with minimal setup.
  • Lightweight
    The library is lightweight, meaning it won't significantly impact page load times, which is crucial for maintaining good performance on web projects.
  • Customizability
    Rellax.js provides various options for customizing parallax effects, such as controlling speed and direction, which allows for flexibility in design.
  • Cross-Browser Compatibility
    The library generally works well across different browsers, ensuring that the parallax effects maintain consistency for a wider audience.

Possible disadvantages of Rellax.js

  • Limited Features Compared to Frameworks
    While it does its job well, Rellax.js lacks the advanced features and breadth of customization options that some other, more comprehensive frameworks offer.
  • Performance on Low-Power Devices
    On devices with limited processing power, such as older smartphones, the performance of parallax effects might cause lag or poor user experience.
  • Dependency on JavaScript
    Since Rellax.js is a JavaScript library, users who have disabled JavaScript in their browsers won't be able to experience the parallax effects.
  • Design Limitations
    The simplicity of Rellax.js might not suit more complex projects which require intricate parallax sequences and interactions.

RepDB features and specs

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

Analysis of Rellax.js

Overall verdict

  • Yes, Rellax.js is considered a good library for creating parallax effects on websites.

Why this product is good

  • Rellax.js is lightweight and easy to implement, making it a popular choice for developers looking to add smooth parallax effects to their web projects. It offers minimal configuration, has no dependencies, and works well across various browsers and devices. Additionally, the performance is generally smooth, providing an enhanced user experience.

Recommended for

  • Web developers looking for a simple and efficient parallax effect library.
  • Projects where performance is crucial, and a lightweight solution is desirable.
  • Designers who want to add depth and interactivity to their website designs without a steep learning curve.

Rellax.js videos

+ Add

Use Rellax.js to Create this Awesome Parallax Scrolling Effect

More videos:

  • Review - 3D Scroll Effects (Rellax.js) | UI Design

RepDB videos

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

Add video

Category Popularity

0-100% (relative to Rellax.js and RepDB)

Rellax.js

RepDB

Development
100 100%
Development
0% 0
Datasets
0 0%
Datasets
100% 100
Javascript UI Libraries
100 100%
Javascript UI Libraries
0% 0
Developer Tools
0 0%
Developer Tools
100% 100

Questions & Answers

As answered by people managing Rellax.js 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

Share your experience with using Rellax.js and RepDB. For example, how are they different and which one is better?
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Social recommendations and mentions

Based on our record, Rellax.js seems to be more popular. It has been mentiond 4 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.

Rellax.js mentions (4)

  • Parallax scrolling: JS or CSS?
    If you want something lightweight but at the expense of strict accuracy, I like the flexibility of Rellax. Source: almost 4 years ago
  • how to create scrolling where only text and image move and not the page?
    Relax (for parallax scrolling speed of elements). Source: over 4 years ago
  • [AskJS] Simple Smooth Scrolling. Why is no library doing this?
    Scroll-based interaction or animations have been popular for quite a while now. But most of the libraries I find either disable the browser scrollbar completely and implement their own scrolling based on css transforms (like locomotive-scoll) or dont touch the native browser scroll at all (like rellax or lax.js). Source: about 5 years ago
  • Very cool web design on this article... "Why almost everything you thought about running is wrong"
    I'm on mobile so I can't see the source but I'm pretty sure it's just parallax, you can just use something like https://dixonandmoe.com/rellax/ to make something very similar. Source: about 5 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 Rellax.js and RepDB, you can also consider the following products

Pixi.js - Fast lightweight 2D library that works across all devices

Substance - A JavaScript library for web-based content editing

Glottologist - JavaScript translation framework

Anime.js - Lightweight JavaScript animation library

p5.js - JS library for creating graphic and interactive experiences

Shiny.js - Shiny reflections for mobile websites ๐ŸŒŸ

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