Applets, tools, and your data
assembled.
Fuusio is a pocket digital multitool for Android. Run small, self-contained web applets and utilities in an offline sandbox. Build new tools and data types on the fly with an embedded AI agent. Manage a flexible personal database, craft custom todo lists, and edit HTML, CSS, JavaScript, and Markdown directly on your phone.
Android · Offline-first · Zero analytics · Powered by Kide MVI
Crafted for clarity & control.
Take a tour through Fuusio's sandboxed applets, AI agent companion, code editor, and utility toolbox.
A phone-sized digital workshop.
Designed for tinkerers, developers, and power users who want their tools and data completely under their control.
Sandboxed Web Applets
Execute lightweight web applications crafted with standard HTML, CSS, and JavaScript. Each applet runs securely isolated within an on-device sandbox without dependencies on remote servers.
Embedded AI Agent Skills
Prompt your local AI agent in conversational English to generate new applets, custom utilities, or database schemas. Build bespoke interactive tools tailored exactly to your workflow in seconds.
Personal Object Database
Create and maintain an extensible personal database right on your device. Generate schema types, store custom data objects, and bind your applets directly to your personal data store.
Built-in Code & Markdown Editor
Inspect, write, and tweak HTML, CSS, JavaScript, and Markdown files on the go. Enjoy syntax highlighting, clean typography, and instant live preview of your scripts.
Import, Export & Community Sharing
Package your applets into zip archives to share with friends, backup locally, or import tools shared by the Fuusio community server. No vendor lock-in, ever.
Strict Privacy & Offline First
No user tracking, no telemetry, no mandatory cloud accounts. Everything runs locally on your Android device. Your data belongs strictly to you.
Fuusio, on a real phone.
Watch a walkthrough showing the applet sandbox, toolbox, and the embedded AI agent in motion.
Watch walkthrough (1:20)
Connect, discuss & build together.
Follow updates, share applet creations, report beta feedback, or participate in development discussions.
Google Play Open Beta
Install the beta build directly onto your Android phone from the Play Store.
org.fuusio.app ↗Reddit Subreddit
Discuss app ideas, showcase your custom applets, and ask questions with other users.
r/FuusioApp ↗Visual highlights, feature tips, applet demos, and release announcements.
@Fuusio ↗GitHub Org
Open-source libraries, architecture specs, and documentation for the Fuusio ecosystem.
github.com/Fuusio ↗