5 things `flutter_gemma` doesn't tell you about shipping Gemma 4 on Android

This is a submission for the Gemma 4 Challenge: Write About Gemma 4

I shipped a Gemma 4 assistant on Android in 17 days. Voice, vision, RAG, eight device actions, everything offline once the model is on device. The project is called PocketClaw, and you can read about it here if that's what you came for.

This post is about the 5 things I had to figure out the hard way. Not in the flutter_gemma README. Not in Google's MediaPipe docs. Not in any of the half-dozen "run Gemma on Android" tutorials I read this week.

If you're about to ship Gemma 4 on Android, I hope this saves you a weekend.

1. Small models drop facts buried mid-prompt. Put what matters at the top.