This is a submission for the Gemma 4 Challenge: Build with Gemma 4 .

TL;DR

Iris is an Android visual assistant for blind and low-vision users.

It describes what the camera sees, out loud, in Brazilian Portuguese .

Gemma 4 multimodal runs 100% on the phone via LiteRT-LM — no cloud, no telemetry, no INTERNET permission.

Three intent-specific modes: Continuous, Question, Reading.

What I Built

I built Iris , an offline Android visual assistant for blind and low-vision users.

The interaction is intentionally simple: point the phone camera at something, tap the screen, and Iris speaks what it sees in Brazilian Portuguese.

Iris has three modes:

Continuous Mode describes the scene in front of the user.

Question Mode lets the user ask a spoken question about the current camera image.

Reading Mode reads visible text aloud, such as a label, medicine box, sign, or package.

A fourth control, Repeat , replays the last description — useful for users who could not catch it all the first time.

The core…