Izuki runs on Google's free Gemini. Get a key (sign in → Create API key), copy it, and paste it here. It stays on this phone only.
Gemini is best here — it can search the web and talk out loud. You can also let another free service answer (Groq is the fastest). Any one key is enough to start.
Pick a character — its own personality and voice, in chat and on calls.
iPhone: in Safari tap Share → Add to Home Screen. Android: Chrome menu ⋮ → Add to Home screen. It opens like an app.
Optional: this makes “Hey Siri, Izuki, what's the weather” open it with your words. It's a bit fiddly — do it slowly, once, and skip it if it's confusing:
Now say “Hey Siri, Izuki”, then what you want. Siri listens, then opens Izuki with your words. (Optional: Settings → Accessibility → Touch → Back Tap to run it by tapping the back of your phone.)
Too fiddly? Skip it — just open the Izuki app from your home screen and tap the orb. Same result.
Have Izuki on a Windows PC? In the PC app turn on Call Izuki from your phone and paste its link here. Then “play lofi on my PC”, your email and calendar, and anything else on the PC work from here too.
Free and private: your key, chats, memories and reminders are kept on this phone. Messages go straight to the AI you picked (Google's Gemini unless you chose another) and to your own PC if linked — nowhere else.