Kapsula

Vladimir Fedorov

About this app

Kapsula turns a single HTML file into a real app on your phone.

Paste code from an AI chat, drop an .html file, or point to a URL — Kapsula runs it in a sandbox and gives it native powers through a tiny JavaScript bridge:

• Exact alarms — real OS alarms that fire to the second, even when the app is closed
• Notifications with sound and vibration
• Local storage that survives restarts
• Haptics and a simple sound player

Why Kapsula instead of a browser tab:

• Alarms actually fire. A tab can't wake your phone at 10:33 sharp — a real OS alarm can.
• Your project lives on the home screen of the app, not lost among tabs.
• No account, no cloud, no analytics, no tracking. Your code and your data stay on your device.
• File and pasted-code projects work fully offline; the internet is used only for URL projects.

Made for people who build small personal tools with AI: shift planners, tea timers, checklists, reminders, tiny games — anything a chat can write into one HTML file, Kapsula runs like an app.

The same file works in a desktop browser too: the kapsula.* bridge is optional, so you can develop on your computer and run on your phone.

Kapsula executes only the code you add yourself. It is not a web browser: there is no address bar, no search, no navigation — just your projects.

What’s new

Kapsula now speaks 13 languages: the app follows your system language, and you can switch it in the header. The built-in Shift demo is localized too.