On-device model
Gemma runs locally through MediaPipe / LiteRT. The model is a single .task file that Ars downloads or that you import yourself.
Ars. Your assistant, entirely on your phone.
Ars by Aetherium runs the language model on-device. It never uploads what you type, what you say, or what is on your screen. Ask it to set alarms, call people, add contacts, send texts, open apps — or to work the screen for you.
What Ars does
Everything happens on the device. No cloud, no account, no telemetry.
Screen control
Ars reads the screen through Android's accessibility tree and can tap, swipe, scroll and type on your behalf — only when you ask.
Real tasks
Alarms and timers, contacts, calls, SMS, opening apps, web search and private notes. All done through the system's own components.
Default assistant
Set Ars as the device's digital assistant. Long-press home, or use the power-button voice trigger, and Ars opens listening.
Speaks and listens
Ars reads its replies aloud with the system text-to-speech engine and takes your requests by voice.
Private by design
No servers are involved in what you say or see. The only network request Ars makes is the one-time model download.
Download Ars
Install the app, then let Ars fetch the model — or download it here and import it.
Ars app
Ars ships with AetheriumOS for Pixel. On other Android 12+ devices the assistant app can be sideloaded, with screen control, TTS and STT, and the assistant role.
Gemma model
Ars works with a Gemma 4 E2B bundle in .task (MediaPipe) format. About 1.9 GB — Wi-Fi recommended. Ars can also download this itself inside the app.
Direct link: gemma-4-E2B-it-web.task
A .litertlm bundle works too. Once downloaded, open Ars → Settings → Language model → Import model file and pick the file. Ars copies it into its private models folder.
Set up Ars in three steps
1. Install and download
Install Ars, open it, and accept the prompt to download Gemma — or import a .task file you already have.
2. Make it the assistant
In Ars → Settings, tap Set Ars as the default assistant and confirm. On older devices use Settings → Apps → Default apps → Digital assistant.
3. Allow screen control
In Ars → Settings, open screen control and turn on the Ars accessibility service. That is what lets Ars read the screen and act on it.