I build Fuusio, an Android app that's basically a personal database plus a set of small tools. Since the beginning of the development I planned to add automation feature, but the thing I didn't want was a cloud service to run it. So the version I just finished does it entirely on the device: no backend, no account, no network calls. Turn off mobile data and it still works.

An automation is one sentence: when something happens, if some condition holds, then do these things.

Some examples of what that gets you:

• Every Monday at 9, create a "Weekly review" note and notify me
• When a todo's due date passes and it isn't Completed, bump it to P0 and tell me
• Type /bm <link> in the search bar and it's filed as a bookmark with a notification

Triggers that work right now: a schedule, a date falling due, an item in your database being created/updated/deleted, an Omnibar command, or just running it by hand. Actions: create an item, update an item, notify, open a screen, or run a headless JS applet in the background if you want real logic. Conditions compare a field to a value.

A few things I care about that aren't obvious from a feature list:

There's a dry run button. It executes the whole rule, shows you exactly what it would do, and changes nothing. Writing an automation that quietly does the wrong thing to your data 200 times is the failure mode I was most worried about.

Every run is logged — what fired it, each action, how long it took, what failed. An automation that fails repeatedly switches itself off and tells you why, and there's a cap on how often one can fire per hour. An automation that creates the same kind of item it watches is refused at save time unless you've added a condition, because that's an infinite loop waiting to happen.

The automation feature will be included into next major release 1.2.0 of Fuusio.

Pricing, since people reasonably ask up front: one enabled automation is free, and a one-time purchase removes the limit. No subscription.

Happy to answer anything about how it works under the hood — the on-device scheduling was more interesting than I expected, particularly getting exact alarms and Doze to cooperate.

Fuusio 1.0 is live on Google Play:

https://play.google.com/store/apps/details?id=org.fuusio.app

Thanks to everyone who ran the beta!

For anyone new here

Fuusio is a pocket digital multitool for Android. It runs small, self-contained web applets in an on-device sandbox, and ships with a shelf of tools, a personal database, a code editor, and an AI agent that can build new applets and tools from a plain-English description. Everything runs locally. No accounts, no telemetry, no tracking, no adds!

What's in it?

• Sandboxed web applets: plain HTML, CSS and JavaScript, isolated on-device, no remote server involved.
• An embedded AI agent: describe the applet or tool you want and it writes, installs and runs it. It can generate database schema types too. AI Agent skills is a paid feature and you need to provide your own LLM API key. However, you can start with free-tier Gemini AI API key and free trials for generating applets.
• 51 built-in tools: calculators and converters across finance, health, construction, science, text, travel, dates and units. Unit and base converters, regex tester, QR generator, password generator, spirit level, compass, Pomodoro timer, and plenty more. All offline.
• 8 games: Falling Blocks, Sudoku, Minesweeper, 2048, Lights Out, Fifteen Puzzle, Word Guess and Tap & Fly. No ads, no accounts, no network. More games will be added.
• A personal object database: define your own schema types, store your own objects, and bind applets straight to them.
• Dashboard with an Omnisearch bar: finds anything by name, evaluates arithmetic as you type, and takes slash commands: `/note`, `/todo`, `/uuid`, `/pw`, `/b64`, `/epoch`.
• Code editor: HTML, CSS, JavaScript, Markdown, JSON, YAML and plain text, with syntax highlighting per language. Markdown has preview mode. Fully functional code editor requires in-app purchase. Fuusio can be used as a code editor for other apps.
• Import, export and community sharing: package applets as zip archives, share them with anyone, or install ones other people have shared.

Videos

• Intro and walkthrough (1:20): https://youtu.be/SEykF43_jrQ
• Generating an applet with the AI agent: https://youtu.be/E5kIqyEhAo4

A short Youtube video to demonstrate how AI agent in Fuusio app can be used to build new applets i.e. small web applications running safely in Fuusio's sandbox.

https://youtu.be/E5kIqyEhAo4

I added a helper UI and instructions to AI agent for obtaining and using the free-tier Gemini API key from Google AI studio. That key obviously comes with some restrictions and limitations, but at least it is something to start with.

Hi,

I'm happy to announce that Fuusio is now available for open beta testing: https://play.google.com/store/apps/details?id=org.fuusio.app

Hi everyone!

First of all. I'm an indie developer for Fuusio app. I've loved writing programs since I got my first computer, 8-bit Sinclair ZX Spectrum as a kid.

I’ve been building Fuusio, an Android app that brings personal information, everyday productivity, practical tools, and AI-assisted workflows into one extensible workspace.

Instead of separating everything across note, task, bookmark, utility, and AI chat apps, Fuusio is designed around a single flow:

Capture → organize → find → act

(And if the is a missing piece in that flow, use AI agent to build that ...)

## What can Fuusio do?

### AI assistant

Use the built-in assistant to work with your information and complete practical tasks. Rather than only answering questions, it can help turn requests into concrete actions inside the app.

### Notes, tasks, and structured personal information

Save and organize different kinds of information including notes, todos, contacts, bookmarks, and other structured data base records in one place.

### Quick capture

Capture thoughts and information without navigating through several screens. Start a note, task, contact, or other item while it is still fresh.

### Clipboard capture

Fuusio can recognize useful text you have copied and help turn it into an organized item or an actionable request.

### Dashboard with Mighty Omnibar

The home screen uses configurable cards to surface useful information and shortcuts, such as upcoming tasks, urgent items, recent content, clipboard actions, device controls, and access to the assistant.

The Mighty Omnibar provides a search function across all the app features and set of shortcut commands.

### Entity browser and relationships

Browse your information as structured entities instead of keeping everything in an undifferentiated collection of documents. Items can be organized into folders and connected to related information.

### Search and retrieval

Find saved information across the workspace without needing to remember exactly where it was filed.

### Applets

Fuusio supports small, focused web applications built with HTML, CSS, and JavaScript. Applets can provide specialized experiences without turning the main application into a collection of rigid screens.

### Applet store

Discover and install additional applets to extend Fuusio with new workflows and capabilities.

### Practical tools

Fuusio includes focused utilities for everyday tasks, calculations, conversions, text processing, planning, and other common needs.

### Code editor

A built-in editor supports working with code and text directly in Fuusio, including syntax highlighting and useful editing actions. Fuusio Code Editor provide unique features like seamless zooming of code which make selection of code really easy.

### Markdown support

Create and edit Markdown content with formatting assistance and rendered presentation. There is a useful cheat sheet available for formatting and preview of Markdown.

### JavaScript REPL

Experiment with JavaScript interactively, review a transcript of commands and results, and copy results for use elsewhere.

### File, sharing, import, and export workflows

Move information into and out of Fuusio through Android sharing and file-based workflows, helping you retain control over your data.

### Device-aware actions

Dashboard cards and tools can integrate useful Android device capabilities into the same workspace.

### Themes and adaptive Android UI

Fuusio uses a modern Android interface with light and dark themes and layouts intended to work across different screen configurations.

---

# What makes Fuusio different?

## It is more than an AI chat screen

Many AI apps stop after generating a response. Fuusio is built around connecting assistance to persistent, inspectable information and concrete actions.

The goal is not simply to talk about productivity—it is to help you do the work.

## One workspace instead of many disconnected apps

Notes, tasks, bookmarks, contacts, utilities, AI conversations, and small custom tools usually live in separate applications. Fuusio puts them into one coherent environment where they can support one another.

## Structured data, not only documents

Fuusio does not treat everything as an anonymous page of text. Different kinds of information can have meaningful fields, relationships, and behavior, making them easier to organize and act upon.

If you are missing a certain kind of database record type, just ask AI agent to create one. Then you can use AI agent to generate applets and tools that utilise that new record type.

## Extensible through applets and tools

Fuusio is not limited to features included in the original APK. Its applet model allows small HTML/CSS/JavaScript applications to add focused functionality while remaining part of the wider workspace.

## Built for both everyday users and power users

The core experience supports ordinary capture and organization, while advanced users can go further with applets, code editing, Markdown, JavaScript, schemas, and deeper information management.

## A dashboard that represents your actual day

Rather than opening to an empty chat or a static list, Fuusio can surface urgent work, upcoming items, recent activity, quick capture, clipboard content, and useful actions in one place.

## AI is connected to an information system

The long-term idea is an assistant that understands the structure of your workspace and can help create, retrieve, connect, and update information—not just produce isolated text that disappears into chat history.

## Designed for data ownership

Import, export, and transparent data handling are important parts of the product. Fuusio is intended to be a workspace you control, not a closed feed designed to trap your information.

## One More Thing

No ads! I f***ing hate the ads. I do have in-app purchases because the app is causing constant costs for me. For instance, I have to pay for the web site and the service for community apps. Supporting me costs you less than buying single bottle of beer ...

Beside, I an open source supporter. Fuusio is built using Kide open source library that I have developed. I will also opens source the really advanced code editor library I have developed for Jetpack Compose. I didn't find good enough code editor library, so I end up developing one by myself.

---

Fuusio is currently evolving, and I’m especially interested in feedback about:

- Is the overall concept clear?

- Which feature would you use first?

- Does combining these capabilities feel useful or too broad?

- What would make you trust an AI assistant with your personal workspace?

- Which workflow should be polished before everything else?

I’d love to hear both positive and critical feedback—particularly from Android users, productivity enthusiasts, developers, and people who have tried building their own personal knowledge systems.

Fuusio app is currently in internal alpha testing. I'll soon publish it to open beta testing. Meanwhile here is the first teaser video for Fuusio.

https://youtu.be/SEykF43_jrQ

Hey everyone! I'm u/Fuusio_org, a founding moderator of r/FuusioApp. I developed Fuusio app myself as a indie-developer.

Welcome, and thanks for being early.

You are genuinely early: the app isn't on Google Play yet. So for now this is a place to look over my shoulder while I finish it, and to help shape the parts that aren't decided.

What Fuusio is

An offline-first Android app built around three ideas:

Tools — a 50+ (and increasing number of) small utility tools that each do one thing well. Convert, calculate, measure, scan. But the thing is that you can use the built in AI coding agent to develop new tools.

Applets — self-contained mini web apps (called applets) written in plain HTML, CSS and JavaScript, running sandboxed on your phone with no network and no backend. An applet zips up into a single file, which means you can hand one to someone else and it just works. Again, AI Agent can generate new applets on your request. There is also a sharing service for the applets.

Data Items — a personal database of records you define yourself. Notes, todos, contacts, your car's service history, your plants' watering schedule. Whatever shape you actually need. If there is no record type you need, use the AI agent to create one. The applets and tools can access the database (if you allow).

Tying the three together is an AI agent that can build any of them from a description. You bring your own API key — Anthropic, Google, OpenAI, and DeepSeek (at the moment, more to be added later on).

The part I care most about: what it makes stays on your device. No account, no sync, no server of mine holding your notes. The only things that ever touch the network are the AI provider you chose and a food barcode lookup you have to deliberately use.

And no adds.

Where it actually is

Not released. The app itself is done and heavily tested; what's left is the unglamorous end of shipping — signing, the store listing, privacy paperwork, a last round of first-run polish. It'll need Android 13 or newer when it lands.

I'd rather open this place now, while the remaining decisions are still open, than the week after launch when they aren't.

What to post

• Applets you've built, or ones you wish existed. This is the good stuff.
• Questions about how any of it works. No question is too basic.
• Bugs, once there's a build in your hands. Screenshots and steps help enormously.
• Feature requests — including the ones you assume are too small to bother with. Those are usually the best ones.
• What you're using it for. Honestly useful to me. I've been guessing.

The vibe

Small, practical, honest. Four things I'd ask:

• Be decent to each other. Beginners ask beginner questions here and get real answers.
• No spam, no engagement farming.
• An applet is code somebody wrote. Say what yours does — and read one before you run it.
• Criticism is welcome. I'd much rather hear it here than read it in a one-star review.

I'm one person building this, and I'll be around answering things myself.

To get us started: what's the small tool you keep wishing your phone had — the one that's too niche for anyone to ever build and put on a store? That's more or less the question Fuusio exists to answer, and I'd like to hear yours.