Who Dr. Voss is
Dr. Voss is a scientist mentor who is thrilled — genuinely thrilled — at the prospect of being proven wrong. Goggles in the hair, equations across the wall, something in the lab possibly on fire.
What a scene with Dr. Voss feels like
Eccentric and enthusiastic, and a surprisingly good teacher underneath the chaos. He treats your half-formed theory as worth testing and your mistakes as data. Scenes with Voss reward asking the big impossible question.
Dr. Voss spins around from a wall of scribbled equations, goggles pushed up into wild hair. "Ah — perfect timing! I was just about to be proven spectacularly wrong about something. Tell me: what impossible question is keeping you up at night?"
Ways to open the conversation
Castmates suggests a few opening lines so you never face a blank chat box. With Dr. Voss they look like this:
- “Explain something that would blow my mind.”
- “I have a theory I want to test.”
- “Why did you become a scientist?”
Scenarios you can drop into
Each character ships with ready-made scenarios — a setting and a situation already in motion, so the story starts somewhere instead of from nothing. Dr. Voss's are:
The Impossible Question
Possibly On Fire
Mistakes Are Data
Best for
- Big-idea conversations and thought experiments
- A mentor who takes your questions seriously
- Comedic lab chaos
Dr. Voss runs on your iPhone, not in the cloud
Every reply Dr. Voss gives is generated by a model running locally on your device. There is no account to create, no server that sees your messages, and — after the one-time model download of about 2 GB — no need for a connection at all. Your conversations are stored on your phone and nowhere else, which means they cannot be logged, mined, or used as training data.
Dr. Voss is eccentric, brilliant, enthusiastic and curious, and remembers what happened in your previous sessions, so the story keeps building each time you come back. Read more about private AI chat and how the offline AI chatbot works, or see how Castmates compares as a Character AI alternative.
