Software Alternatives, Accelerators & Startups

Chronos VS RepDB

Compare Chronos VS RepDB and see what are their differences

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Chronos logo Chronos

Automatically change almost any setting on your phone depending on location, time of day, dock...

RepDB logo RepDB

Exercise dataset for fitness apps: transparent background, animations, no subscription
Visit Website
  • Chronos Landing page
    Landing page //
    2023-09-24
  • 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 / One-off
Platforms
Web Mobile
Release Date
2026 July

Chronos features and specs

  • User-Friendly Interface
    Chronos offers a clean and intuitive user interface that is easy to navigate, making it accessible for users of all technical levels.
  • Cross-Platform Support
    Chronos is designed to work seamlessly across various platforms and devices, providing a consistent user experience.
  • Comprehensive Features
    The platform includes a wide range of features that cater to different user needs, such as scheduling, reminders, and task management.

Possible disadvantages of Chronos

  • Limited Customization
    Some users may find the level of customization available in Chronos to be insufficient for specific personal or business needs.
  • Subscription Costs
    Chronos may require a subscription for full access to all features, which could be a disadvantage for budget-conscious users.
  • Integration Limitations
    Chronos may have limited integration options with other software and tools, which can be a drawback for users relying on various third-party applications.

RepDB features and specs

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

Chronos videos

Chronos: Before the Ashes Review - The Final Verdict

More videos:

  • Review - Chronos Review
  • Review - Chronos: Before the Ashes | Review in 3 Minutes

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 Chronos and RepDB)
Web Service Automation
100 100%
0% 0
Datasets
0 0%
100% 100
Office & Productivity
100 100%
0% 0
Developer Tools
0 0%
100% 100

Questions & Answers

As answered by people managing Chronos 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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