One domain, many worlds — by Yunus Emre Vurgun
A growing catalog of free web apps, tools & games.
23 apps live today: book discovery engines, reading trackers, quiet productivity tools, a neural-network game, experiments and references — free, private and account-free.
Most recent update: ZenFocus — 30 Aug 2026
The catalog
23 matches
Book discovery
7 appsReader tools
5 appsTools
7 appsGames
1 appExperiments
1 appReference
1 appGuides
1 appNo apps match “”. Try a different term or clear the filters.
Real apps, live right now
Not mockups — these are the actual pages running on apprun.icu today, captured from a live browser.
How apprun works
Public data in. Private browsing out.
About the hub
apprun.icu is one domain, many worlds. It hosts a growing collection of small, self-contained web apps — each with its own page, its own purpose, and nothing shared between them except a domain. Book discovery engines merge Open Library and Google Books into live-ranked lists; reader tools keep your shelf private in your own browser; the tools under Bravest New World stay quiet and focused; and the games and experiments explore what a browser can do.
Everything here is free, account-free and tracking-free. Apps that use data keep it in your browser's local storage; catalog lookups go through a first-party proxy that never sees your identity. The platform is not open to external contributions or uploads — every app is built by Yunus Emre Vurgun.
Content changes are announced through the RSS feed, indexed in the XML sitemap, and summarized for AI crawlers in llms.txt and llms-full.txt.
Reader data, notes and settings live in localStorage — never on a server, never shared.
New apps and updates are published in RSS, the sitemap and LLM indexes.
Yunus Emre Vurgun builds and maintains every app — see more at yunusemrevurgun.com.
Frequently asked questions
What is apprun.icu?
apprun.icu is a personal platform by Yunus Emre Vurgun: one domain hosting many independent, self-contained web apps — live-ranked book discovery, reading trackers, productivity tools, a game, experiments and references. One domain, many worlds.
Are the apps free?
Yes. Every app on apprun.icu is free to use and needs no account, no payment and no sign-up. Some pages carry a book-shop widget and occasional offers from the author\u2019s Gumroad store.
Do the apps collect my data?
No. Reader apps and tools keep your data in your own browser via localStorage — no accounts, no tracking, no server-side storage. Book discovery apps fetch public catalog data (Open Library, Google Books) through a first-party proxy, and only aggregate visit signals are used to refresh the sitemap.
Can I host an app on apprun.icu?
No. apprun.icu is not open to external contributions or uploads; every app is created and maintained by Yunus Emre Vurgun.