Software Alternatives, Accelerators & Startups

Knock VS RepDB

Compare Knock VS RepDB and see what are their differences

Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Knock logo Knock

Sell your home in 6 weeks or less

RepDB logo RepDB

Exercise dataset for fitness apps: transparent background, animations, no subscription
Visit Website
  • Knock Landing page
    Landing page //
    2023-06-28
  • 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.

Knock

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

RepDB

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

Knock features and specs

  • Streamlined Buying Process
    Knock simplifies the process of buying a new home by allowing users to make competitive offers without the contingency of selling their current home first.
  • Home Equity Access
    Users can access their home equity before selling, which can be useful for securing a new mortgage or funding the move.
  • Flexible Move Timing
    Knock offers flexibility in timing the move, enabling users to buy and move into a new home before they sell their old one.
  • Dedicated Support
    The service provides dedicated support from real estate experts, which can help in navigating complex transactions.

Possible disadvantages of Knock

  • Service Fees
    Knock charges a service fee, which could be an additional cost on top of traditional real estate transaction fees.
  • Market Limitations
    The service is not available in all real estate markets, limiting accessibility for some potential users.
  • Complexity of Transactions
    Though Knock simplifies parts of the process, managing two transactions (buying a new home and selling the old one) can still be complex.
  • Qualification Requirements
    Knock has specific financial and credit requirements that users must meet to qualify for their services.

RepDB features and specs

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

Knock videos

KNOCK KNOCK MOVIE REVIEW | Double Toasted

More videos:

  • Review - Knock Knock (2015) - Movie Review
  • Review - Epic RANT - Knock Knock (2015) Movie Review

RepDB videos

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

Add video

Category Popularity

0-100% (relative to Knock and RepDB)
Personal Finance
100 100%
0% 0
Datasets
0 0%
100% 100
Tech
100 100%
0% 0
Developer Tools
0 0%
100% 100

Questions & Answers

As answered by people managing Knock 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 Knock 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, Knock seems to be more popular. It has been mentiond 3 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.

Knock mentions (3)

  • How to sell our house and buy a new one very quickly in another state?
    There are house swap programs out there like knock.com and orchard that tap into your current equity to make a purchase first then sell scenario doable. Source: over 3 years ago
  • Testing Patterns And Strategies
    Our goal at Knock is to empower people to move freely. A large part of acheiving that goal is to make real estate transactions as easy and seamless as possible for our customers. Real estate transactions are very complicated. Calling them a "big ball of mud" is being gracious. If we could sum up such transactions up in one image, it would be the image of Charlie Day explaining how a person named Pepe Silvia... - Source: dev.to / about 5 years ago
  • Knock and Open Source
    Knock.com is built with Open Source Software (OSS). It permeates our technology stack from the interactive website all the way through to the services and systems that power our infrastructure. We depend on OSS, and we are excited to start contributing back to our community. Doing so aligns well with a couple of our core values, which we call POPSICLE, "people first" and โ€œopenโ€:. - Source: dev.to / 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 Knock and RepDB, you can also consider the following products

HelloClever.co - We reckon itโ€™s time to get Clever and get some bank balance back in your life. Sign up in minutes to supercharge your money management.

Gym Log Track - The simple, intuitive app that makes it easy to plan, log and track your workouts, exercises, photos, videos, routines and clients quickly.

HelloHome.co - Sell your home for a flat fee with a full-service REALTORยฎ

RepRaptor - Build, share, and run structured workout programs. Free for lifters. Flat pricing for coaches. No per-client fees.

Nested - A guaranteed price for your home

Reps.app - Reps - Workout Tracker Gym Log