Black PWA
The simplest Progressive Web App ever? It's just a black window / screen, but it can be used to test PWA support on any browser and platform. Other uses?
Not sure how to add Black PWA to your home screen? Step-by-step for Chrome, Safari, Firefox and Edge — it takes about ten seconds, and there is no app store involved.
Own Black PWA? Have us re-run this measurement — we open it in a real browser, cut the network, and send you what survived.
How to install Black PWA as a PWA
Are you the maker of Black PWA? Claim this listing →
Similar to Black PWA
CharMix is a word game based on Wordle, but has the following extra features: - Can be at any time, no need to wait for the next day to play again; - Customizable number of letters of word to guess, between 4 and 10; - Customizable number of tries, between 4 and 10; - Customizabl
Defrag98 recreates the Windows 98 Disk Defragmenter in your browser, down to the window chrome and the bitmap fonts. Pick one of four drives, press Start, and watch the cluster grid sort itself out to the sound of a grinding hard disk. It touches no real files. Installs to your home screen from any modern browser — no app store, no download; its manifest declares standalone display with a 512px icon, and its service worker caches assets for offline use. Submitted by its author and measured on 2026-08-31.
Calculate in a notebook and share — from everyday math to engineering. Use variables, functions, and units and see results immediately. Add comments, copy calculations to apps like Word or Excel, or share them through an editable link. Calculate thermodynamic fluid properties with the integrated CoolProp library.
A single-page web tool that visualizes searching and sorting algorithms to demonstrate computer science concepts such as Big-O complexity. Built with React, TypeScript, and D3, and tuned with progressive web app capability. Useful for students and developers studying data structures and algorithms.
DOKUMENTASI MADRASAH collects documentation of school activities for MTsN 1 Pandeglang, an Indonesian madrasah, in one place. Students, teachers, and staff can browse records of the school's events and programs, keeping the community's activity documentation organized and reachable from any browser.
Interactive mathematics for all levels — geometry, algebra, calculus, statistics. Create dynamic constructions, share interactive visualizations. Free for students and teachers forever. Constructions stay dynamic, so dragging a point updates every dependent value and shows the relationship rather than one case.
Own a PWA? See the listing options — standard submission is free.