This is a submission for the Gemma 4 Challenge: Build with Gemma 4
The way we use AI on our phones is changing. People want more from their devices, but the main way we reach all these breakthroughs in AI is still a chatbot window. And we don't just want assistance, we want assistance that actually knows us. The AI should understand who you are, get the help you really need, and step in right where you need it. The catch is that for a long time you had to choose: you could have real personalization, or you could have real privacy, but not both. Anything that knows you that well usually ends up living in someone else's cloud.
Gemma 4 changes that. It's small enough to run on the phone in your pocket, but still capable enough to reason, see, and hold a real conversation, which means an assistant can finally know you without sending your life off to a server. That's the whole idea behind Aide: a personal, on-device assistant powered by Gemma 4, where the intelligence stays with you and you stay in control.
What I Built
Aide is a private-first Android app that puts a frontier-class AI model on the two surfaces you already touch every day: the system keyboard and the assistant button. Instead of asking you to open yet another chatbot, it brings Gemma 4 to where you already type, talk, and tap. Everything runs on-device by default through LiteRT-LM, and the cloud is strictly opt-in. The same loaded model backs all three surfaces, so chat, keyboard, and assistant stay in sync.
