Reactive Playground vs Outline Server Manager

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.

Outline Manager — your Outline servers, right in your pocket. Outline Manager is a clean, native iOS app for administering the Outline (Shadowsocks) servers you run yourself. Connect to a server with its management config and manage everything from your iPhone — no laptop required. MANAGE ACCESS KEYS • Create, rename, and remove access keys in seconds • Share a key with anyone using the native share sheet • Set a monthly data limit per key, or a default limit for the whole server • See total data used — and the limit — at a glance SEE WHO'S ONLINE — LIVE • Real-time "Active now" status for every key • Built from your server's own traffic metrics, refreshed automatically • Last-activity time for keys that are currently idle SERVER STATISTICS • Total data transferred, tunnel time, current and peak bandwidth • Traffic broken down by location • Switch the analytics window between 24 hours, 7 days, and 30 days MULTIPLE SERVERS • Add as many servers as you like and switch between them instantly • Rename servers, manage default limits, and toggle anonymous metrics PRIVATE & SECURE BY DESIGN • Talks directly to your server — no third-party servers, no accounts, no tracking • Pins your server's self-signed certificate by its SHA-256 fingerprint • Your server details stay on your device BUILT FOR iOS • Native SwiftUI design that feels right at home • Available in English, Russian, and Uzbek — switch anytime in Settings • Works on iPhone, iOS 16 and later Outline Manager is an independent, third-party app and is not affiliated with or endorsed by Jigsaw or the Outline project. You'll need your own Outline server and its management API access to use it.