ChurnKey VS RepDB
Compare ChurnKey VS RepDB and see what are their differences
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ChurnKey
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RepDB
Supercharge all aspects of customer retention, optimize your company’s growth. Keep more customers with personalized cancel flows, recover failed payments, and inform customer-driven product development.
RepDB is a one-time-purchase exercise dataset with animations for developers building fitness and workout apps — 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 600+ exercises with flat-style 512×512 images, attribution-licensed for commercial in-app use. The Starter tier ($299) adds the full catalog in classic white-background style. Standard ($499) adds transparent 1024px images, looping animations, exercise relations (similar/progressions/regressions), workout templates, and embeddings — 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.
ChurnKey RepDBRepDB's answer:
RepDB is sold as a one-time download, not a metered API — 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.
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.
RepDB's answer:
Most alternatives are subscription APIs — 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.
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.
Based on our record, ChurnKey seems to be more popular. It has been mentiond 6 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.
At Churnkey, I'd lie in bed mentally refactoring, obsessing over architectural decisions, seeing data flows in my head. I knew every line. Every function. Every quirky workaround and why it existed. The codebases lived in my head rent-free. - Source: dev.to / about 1 year ago
I'm also a co-founder at Churnkey: https://churnkey.co. Source: about 5 years ago
At Zubtitle.com, we have been focusing on bringing churn down from 10% down to 7%. We even started a new SaaS (churnkey.co) that helps others cut churn via better cancellation flows. Source: about 5 years ago
Most recently, we built a suite of internal tools as a way to reduce churn across all of these SaaS companies. It worked so well that we packaged them up and released them as their own product, Churnkey. We now help other SaaS companies cut churn by deploying optimized cancellation flows. Source: about 5 years ago
We recently sold that business to Calm Capital. We realized that the business really needed more seasoned operators to get to it next level of growth. Plus, it was time to take some risk off the table and free up time to work on our new venture Churnkey. Source: about 5 years ago
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