styled-components
Tailwind CSS
Sass
Next.js
Ant Design
React
Storybook
Chakra UI
RepDB
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.
styled-components 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, styled-components seems to be more popular. It has been mentiond 174 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.
Styled components - Visual primitives for the component age. - Source: dev.to / 7 months ago
To make the article more visual, let's look at such popular CSS-in-JS libraries as Emotion CSS and Styled Components as an example. - Source: dev.to / 7 months ago
Styled components is a CSS-in-JS tool that bridges the gap between components and styling. The main goal of this tool is to provide us a flexible way to add custom styling to our components in a functional and reusable way. - Source: dev.to / about 1 year ago
Styling in React has evolved from global CSS to more component-centric approaches. CSS-in-JS libraries, such as Styled Components or Emotion, allow developers to write CSS within JavaScript, scoping styles to components and enabling dynamic theming. For example:. - Source: dev.to / about 1 year ago
Diving into CSS-in-JS wasn't really a technical choice. My wife, as a UX designer, had good words about Material Design, so I headed to MUI without thinking too much. At that time, Emotion was the first-class citizen there. Meanwhile, my company's UI component library chose styled-components for styling. Both are widely used CSS-in-JS libraries. - Source: dev.to / over 1 year ago
Tailwind CSS - A utility-first CSS framework for rapidly building custom user interfaces.
Sass - Syntatically Awesome Style Sheets
Next.js - A small framework for server-rendered universal JavaScript apps
Ant Design - An enterprise-class UI design language and React implementation with a set of high-quality React components, one of best React UI library for enterprises
React - A JavaScript library for building user interfaces
Storybook - Storybook is an open source tool for developing UI components in isolation for React, Vue, and Angular. It makes building stunning UIs organized and efficient.