Software Alternatives, Accelerators & Startups

Chrono Clock VS RepDB

Compare Chrono Clock VS RepDB and see what are their differences

Chrono Clock logo Chrono Clock

A modern and powerful clock, alarms, timer and stopwatch app for Android.

RepDB logo RepDB

Exercise dataset for fitness apps: transparent background, animations, no subscription
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Not present
  • 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.

Chrono Clock

Website
github.com
Pricing URL
-
$ Details
-
Platforms
-
Release Date
-

RepDB

Website
repdb.co
$ Details
freemium $299.0 / One-off
Platforms
Web Mobile
Release Date
2026 July

Chrono Clock features and specs

  • Open Source
    Chrono Clock being open source means that it is free to use, modify, and distribute, which encourages collaboration and contribution from the community.
  • Easy Integration
    The project is designed to be easily integrated into existing systems, offering straightforward installation and configuration processes.
  • Customizable
    Chrono Clock provides a high level of customization, allowing users to tailor the functionality and appearance to meet specific needs.
  • Active Development
    The project has an active development community, which means it is likely to receive regular updates, improvements, and bug fixes.

Possible disadvantages of Chrono Clock

  • Limited Documentation
    The available documentation may be lacking in detail, which can make it difficult for new users to fully understand and utilize all features of the software.
  • Steep Learning Curve
    Users might encounter a steep learning curve if they are not familiar with similar projects, as some concepts might not be intuitive.
  • Potential Dependence on Community
    Relying heavily on community support can be a con, as changes in community interest could impact the project's development and support availability.
  • Compatibility Issues
    There might be compatibility issues with certain systems or versions, requiring additional troubleshooting or adjustments.

RepDB features and specs

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

Chrono Clock videos

Visual Novel Review: Chrono Clock

RepDB videos

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Category Popularity

0-100% (relative to Chrono Clock and RepDB)
Time Tracking
100 100%
0% 0
Developer Tools
0 0%
100% 100
Task Management
100 100%
0% 0
Health And Fitness
78 78%
22% 22

Questions & Answers

As answered by people managing Chrono Clock 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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What are some alternatives?

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

Fossify Clock - Combination of a beautiful clock with widget, alarm, stopwatch & timer, no ads - FossifyOrg/Clock

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Simple Calendar - A simple calendar with events (optional recurring and reminders), week numbers and a customizable...

Just a clock - This is an opensource app for Android