Gemma 4 E2B runs surprisingly well on my 8GB Android phone, so I built a private voice notes app around it.

Been running Gemma 4 E2B locally on my OnePlus CE 5 (8GB RAM) for a few months. Chat quality is fine for the size. What surprised me was JSON output. Short input, give it a structured prompt, you get clean parse able JSON back. Way better than I expected from a 2.4GB model on a phone. Got me thinking about voice notes. You ramble for a few seconds, "call the dentist tomorrow at 3, also buy milk on the way home", and Gemma can split that into separate items, tag each one (reminder, buy), resolve the time. Tried it for a few weeks.