IcePanel
draw.io
Structurizr
Terrastruct
Diagrams
C4 model
Miro
LucidChart
RepDB
Help everyone understand complex systems using lightweight and interactive visuals. IcePanel helps technical and non-technical people model their software architecture in a simple and structured way using the C4 model. Create diagrams at different levels of detail, from high-level to low-level, that connect to your code. Tell dynamic stories about your architecture using Flows and Tags to help onboard new team members, or evaluate key user journeys.
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 400 exercises with flat-style 512ร512 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.
IcePanel RepDBRepDB'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.
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 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.
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, IcePanel seems to be more popular. It has been mentiond 36 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.
For the architectural documentation like this one, the C4 Model [0] is a much better fit than UML - primarily because it's less rigid in notation and modeling components. And in terms of tooling, I find IcePanel [1] to have the right combination of flexibility and simplicity. [0] https://c4model.com/ [1] https://icepanel.io/. - Source: Hacker News / over 1 year ago
https://icepanel.io/ The best I've ever used. - Source: Hacker News / over 2 years ago
I use UML quite a bit but it's never really what I'm after, somnething more modern and fluid and gui driven that more people can use. Icepanel [1] looks really cool but I haven't tested it and I'm not sure it really fits my use case. It seems like it's mostly for api driven rpc/grpc/rest services when I kind of want to use it to visualize backend/infra/terraform sort of things. Might be interesting to you. [1] -... - Source: Hacker News / over 2 years ago
1. We started using https://icepanel.io/ for microservices, Software, anything thats documentable for later read. 2. More diagrams, less key strokes 3. We have dedicated page owners on confluence, its mix of engineers, leaders, PM's, QA etc. - Source: Hacker News / over 2 years ago
The best tool for writing C4 documentation I have seen so far is https://icepanel.io/. - Source: Hacker News / almost 3 years ago
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