Reactive Playground vs Hotfork

Reactive Playground is a visual learning app for reactive programming. Instead of reading operator definitions only, you can play with marble timelines directly. Pick a category, open an operator, move events around, edit their values, clone items, remove them, or turn them into errors and completed events. The output updates live so you can understand what each operator really does. Explore operator categories such as: Transforming Filtering Combining Error Handling Utility Each playground shows a source timeline, an output timeline, a short explanation, and a code-style example. It is useful for learning ReactiveX concepts, reviewing operators, or quickly refreshing how a stream behaves before using it in code. Reactive Playground is made for developers, students, and anyone learning Rx-style reactive programming.

Never miss an idea again. See the open-source projects the world is building — in real time. Hotfork keeps you on top of the GitHub trends that actually move the industry: trending repositories, top GitHub repos, and the stars, forks and issues behind them — updated continuously, right on your iPhone. WHY HOTFORK Your daily tech radar. Browse the GitHub trending feed for Today, Week, or Month, filter by your favorite programming language (Swift, Rust, Python, TypeScript, Go, and more), and watch the leaderboard of repos gaining the most stars today. The result? You spot the next big open source project early — before it goes viral. WHAT'S INSIDE • TRENDING FEED — Infinite scroll through hundreds of trending repositories, ranked by stars today, with rank numbers, star deltas and language badges on every card. • ENGAGEMENTS — The hottest repos right now, sorted by stars gained today/week/month, with podium colors for the top 3. Know what developers were excited about today. • REPO DETAILS THAT TELL A STORY — Open any repo to see its README description, stars with +/− deltas, forks, open issues, open pull requests, a 12-month star history chart, language breakdown, topics and similar projects. • SMART SEARCH — Find any GitHub repo by name, description or topic, with language filters and debounced instant results. Never lose track of a project again. • SAVED & OFFLINE — Bookmark repositories for later. They stay available offline, with your own private notes attached. • FAST, NATIVE, QUIET — SwiftUI, iOS 18 design, smart caching (feeds load in milliseconds), monospace terminal-style numbers, dark-mode-first. No accounts, no trackers, nothing to configure. BUILT FOR Developers, open-source fans, tech investors, engineering managers, students and everyone who wants to know what's trending in code — in one tap. HOW IT WORKS 1. Open the app — the today's trending feed is already loaded. 2. Scroll. Star the repos you like. Save them for later. 3. Tap any repo to dig into its history, stars and similar projects. Privacy. Minimal. No account. No tracking. No nonsense. Just the best of GitHub, watching for you. Download Hotfork — see what developers are shipping — free.