Gemma 4 E2B runs well on an 8GB Android phone, powering a private voice notes app

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

A Reddit user ran Gemma 4 E2B locally on an 8GB OnePlus CE 5 and built a private voice notes app. Whisper Small 244MB transcribes, Gemma 4 E2B 2.4GB splits and tags, and a 10-15s note takes 12-15s end to end. Search uses query expansion, FTS lanes, RRF, and optional Gemma top-K reranking with a 15s fallback.

Why it matters: HKR-H/K/R all pass, but this is a Reddit first-person build, not an official Google release. Concrete hardware, latency, model size, and retrieval details place it near the top of the tutorial band.