Software Alternatives, Accelerators & Startups

Limnu VS RepDB

Compare Limnu VS RepDB and see what are their differences

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Limnu logo Limnu

Sketch, share and collaborate with your team

RepDB logo RepDB

Exercise dataset for fitness apps: transparent background, animations, no subscription
Visit Website
  • Limnu Landing page
    Landing page //
    2021-10-19
  • RepDB Standard exercise dataset
    Standard exercise dataset //
    2026-08-15
  • RepDB Starter tier
    Starter tier //
    2026-08-15

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 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 $299.0 / One-off
Platforms
Web Mobile
Release Date
2026 July

Limnu features and specs

  • User-Friendly Interface
    Limnu provides a smooth, intuitive interface that allows users to easily create and interact with whiteboards, making it accessible even for beginners.
  • Real-Time Collaboration
    It offers real-time collaboration features, allowing multiple users to work on the same board simultaneously, which can enhance teamwork and productivity.
  • Cross-Platform Compatibility
    Limnu is available on various platforms including web, iOS, and Android, providing flexibility and accessibility for users across different devices.
  • Versatile Drawing Tools
    The platform offers a range of drawing tools and options, enabling users to express their ideas creatively and customize their boards according to their needs.

Possible disadvantages of Limnu

  • Limited Free Version
    The free version of Limnu has several limitations, such as restricted access to certain features and a cap on the number of boards, which may require users to upgrade for full functionality.
  • Requires Internet Connection
    Since Limnu is primarily a cloud-based tool, a stable internet connection is necessary for real-time collaboration and access, which may be a constraint for some users.
  • Potential Learning Curve
    Despite its user-friendly interface, some users may experience a learning curve when first using the platform, particularly those unfamiliar with digital whiteboarding tools.
  • Performance Issues on Large Boards
    Users might encounter performance issues, such as lagging or slow responsiveness, when working with especially large and complex boards.

RepDB features and specs

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

Limnu videos

Limnu Demo

More videos:

  • Review - Video conferencing now available on Limnu whiteboards
  • Review - v1 ep 11 Limnu Interactive White Board

RepDB videos

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

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Category Popularity

0-100% (relative to Limnu and RepDB)
Digital Whiteboard
100 100%
0% 0
Datasets
0 0%
100% 100
Online Services
100 100%
0% 0
Developer Tools
0 0%
100% 100

Questions & Answers

As answered by people managing Limnu 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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Reviews

These are some of the external sources and on-site user reviews we've used to compare Limnu and RepDB

Limnu Reviews

The 11 best online whiteboards
But Limnu does a lot more than give realistic marker drawings: It also includes collaboration features that will convince you that the jump to a digital whiteboard was worthwhile. To invite others to view your board, click on the share icon and copy/paste the link. You can even limit their permissions, if you want, so that they can view the board without editing the content....
Source: zapier.com
Google Jamboard too pricy? Here are 4 low-cost virtual whiteboard app alternatives
Limnu works in a browser on both desktop and mobile devices, as well as within an app on Android or iOS devices. The app integrates both with Slack (so you can collaboratively add an illustration to a channel) and with appear.in (for video conferencing). As of November 2016, Limnu offers both a $5 per month plan for an individual and an $8 per user, per month plan for teams....
6 Jamboard Alternatives to Interactive Whiteboard
Similar to Miro, Limnu does not have the highlighter tool on its jamboard as well. However, the more important challenge of using Limnu to teach would be the lack of multiple jamboards within the software. While a single-screen jamboard allows all students to be focused in one place, it may not be ideal as you will not be allowed to assign your studentsโ€™ different...
Source: blog.heyhi.sg

RepDB Reviews

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What are some alternatives?

When comparing Limnu and RepDB, you can also consider the following products

Sketchboard.io - Visual Remote Teamwork. Solve problems and create ideas on endless whiteboard with your teammates by sketching.

Bluescape - Bluescape is a visual collaborative workspace designed to elevate work that empowers creation, collaborate, and innovate across the entire enterprise.

CollaBoard - IBV Solutions is a Software Development firm specialized in developing state-of-the-art business applications for Microsoft Surface Hub and HoloLens.

Draw.Chat - Anonymous real-time whiteboard with text and video chat.

RealtimeBoard - RealtimeBoard is an online collaboration software created as a team collaboration and online brainstorming tool. It's super easy to use & free!

MultiDraw - Draw with others in real time.