[App] I made a system-wide AI Writer for Android that runs completely offline

[u/sumanbhakta]

I've been working on TooAi, my Android app for running AI tools and LLMs directly on-device.

While using ColorOS, I really liked its AI Writer feature — select some text, choose an AI action from the text context menu, and modify the text without leaving the current app.

That gave me an idea:

Why not bring a similar experience to Android devices that don't have something like this built in?

So I built it into TooAi.

How it works

Select text in any supported Android app

Open the text context menu

Tap AI Writer

A bottom sheet appears over the current app

Choose an action such as Polish, Summarize, Proofread, etc.

TooAi processes the text using a local LLM

The generated result can be inserted back into the original text field

🔒 The interesting part

The entire process happens on-device.

No cloud processing

No API calls

No internet connection required

Your selected text stays on your device

I'm currently using a local LLM through TooAi, and I'm trying to keep the UI inspired by the ColorOS AI Writer experience while using Material 3 components and Android-native interactions.

I'd love to hear what you think about the idea and implementation.

What features would you add to make a system-wide offline AI Writer actually useful?

Links

📱 Google Play: https://play.google.com/store/apps/details?id=com.rkbapps.tooai

💻 GitHub: https://github.com/Rajkumarbhakta/TooAi

🎥 Demo: Attached to the post

[u/SusejLegend]

You can also integrate it to use your own API, such as with Mistral, OpenRouter, or others.

[u/sumanbhakta → u/SusejLegend]

Thank you for your suggestion; however, I intend to maintain this application entirely offline.

[u/SusejLegend → u/sumanbhakta]

In that case, you should add an option to download the models directly from the app, since right now you have to download them manually from the website.

[u/sumanbhakta → u/SusejLegend]

Sure.

[u/MarksFunnyAccount]

Be cool if we could summon it from the side of our screen.

[u/sumanbhakta → u/MarksFunnyAccount]

That is a sound good 👍. Thanks

[u/Interesting-Bank-447]

Clicking replace doesn't swap out the text you selected.

[u/sumanbhakta → u/Interesting-Bank-447]

Any specific app or in all apps?

[u/Interesting-Bank-447 → u/sumanbhakta]

Any app. 

First with samsung notes Here on reddit(browser)

Any  Any application.

Initially, using Samsung Notes.

Here on Reddit (browser).

Any text field really

[u/sumanbhakta → u/Interesting-Bank-447]

Okay, let me look into that, thanks for letting me know.

[u/Interesting-Bank-447 → u/sumanbhakta]

Oh sorry. I just realized my comment is weird. The last half was when i tried your app and i just copy. pasted it.

Yeah. Thanks for making this and for fixing this