Software Alternatives, Accelerators & Startups

Voiden.md VS RepDB

Compare Voiden.md VS RepDB and see what are their differences

Voiden.md logo Voiden.md

Voiden.md is an offline-first, Git-native API workspace that unifies specs, docs, tests, and mocks using programmable Markdown blocks. Build APIs the way you actually work.

RepDB logo RepDB

Exercise dataset for fitness apps: transparent background, animations, no subscription
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Voiden is an offline, Git-native API client built around plain text files. Instead of storing requests in cloud workspaces or JSON collections, Voiden runs HTTP requests directly from Markdown files in your repository.

Requests, documentation, and tests live side-by-side in the same file and execute in place. Every part of a request โ€” endpoints, headers, auth, params โ€” can be structured and reused, making API work modular and version-controlled like code.

There are no exports, no sync steps, and no hidden storage layer. Git is the workspace. Markdown is the format. Your API requests are just files in your repo.

Voiden is designed for developers who already version control everything else โ€” and expect their API tooling to work the same way.

  • 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.

Voiden.md

Website
voiden.md
Pricing URL
-
$ Details
free
Platforms
Linux Mac MacOS Windows
Release Date
2026 January
Startup details
Country
The Netherlands
City
Amsterdam
Employees
1 - 9

RepDB

Website
repdb.co
$ Details
freemium $299 / One-off
Platforms
Web Mobile
Release Date
2026 July

Voiden.md features and specs

  • plain text
    markdown
  • executable docs
    design, testing and api documentation and context
  • programmable interface
    no forms, slash commands
  • LEGO for HTTP
    Every part of a request endpoints, headers, auth, params is a composable block. Reuse across files. Version control like code.

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 Voiden.md

Overall verdict

  • Voiden.md is a solid, developer-friendly API client that emphasizes local-first, offline, and Git-native workflows, making it a compelling free alternative to cloud-based tools like Postman.

Why this product is good

  • Local-first and offline-capable, so your API specs and requests stay on your machine without forced cloud sync
  • Git-native design lets you version control API definitions and collaborate through standard Git workflows
  • Uses plain Markdown files for documentation, keeping your API docs human-readable and portable
  • Free to use with no account or login requirements, avoiding vendor lock-in and paywalls
  • Lightweight and fast compared to heavier, bloated API clients
  • Privacy-friendly since data isn't sent to third-party servers

Recommended for

  • Developers who prefer local-first and offline tools
  • Teams that want to version control and collaborate on API specs via Git
  • Privacy-conscious users who dislike mandatory cloud sync or accounts
  • Individuals looking for a free, lightweight alternative to Postman or Insomnia
  • Documentation-focused workflows where Markdown-based API docs are valued

Category Popularity

0-100% (relative to Voiden.md and RepDB)
API Tools
100 100%
0% 0
Developer Tools
81 81%
19% 19
Health And Fitness
0 0%
100% 100
APIs
100 100%
0% 0

Questions & Answers

As answered by people managing Voiden.md 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 Voiden.md 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, Voiden.md seems to be more popular. It has been mentiond 32 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.

Voiden.md mentions (32)

  • Why Open Source API Tools Are Having a Moment
    I've personally enjoyed following projects like Voiden. It's been interesting to see how quickly the project has evolved and how much the community has contributed. Recently they've even added support for AI agents like Claude and Codex through skills, which feels like a glimpse of where developer tools are heading next. - Source: dev.to / about 2 months ago
  • Slumber a TUI HTTP Client
    Great to see this space so active.I see this a TUI. You can also try out Voiden : https://voiden.md/ which has a different approach to this. Also YAML is a interesting choice - any reasons for this. - Source: Hacker News / 3 months ago
  • A Markdown-based test suite
    I think you will like https://voiden.md/ - some what similar to what you did here. - Source: Hacker News / 3 months ago
  • Show HN: Files.md โ€“ open-source alternative to Obsidian
    I too built something similar but as an API Client - https://voiden.md/ - Obsidian really picking up ! - Source: Hacker News / 3 months ago
  • Show HN: Mezz, a curl-able WiFi sandbox for IoT pentesting
    This is very interesting - instead of curl you can integrate https://voiden.md/ maybe. - Source: Hacker News / 3 months ago
View more

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 Voiden.md and RepDB, you can also consider the following products

Insomnia REST - Design, debug, test, and mock APIs locally, on Git, or cloud. Build better APIs collaboratively for the most popular protocols with a devโ€‘friendly UI, built-in automation, and an extensible plugin ecosystem.

Bruno - Bruno is a Git-integrated, fully offline, and open-source API client

Postman - The Collaboration Platform for API Development

Yaak.app - The API client you'll actually enjoy. Yaak is a fast, secure, and offline API client that works with Git.

Hoppscotch - Open source API development ecosystem

HTTPie for Terminal - Developers all around the world rely on HTTPie for API testing.