Live Demo

Meet Donna

Your AI-powered pen assistant. Ask anything — get instant answers displayed right on your pen's OLED screen. Powered by GPT-4o, always in your pocket.

Try the Demo Get Nexus Pen
2s avg response time
5 AI modes
24kHz audio fidelity
GPT-4o powered
Example Conversations

See Donna in Action

Select a mode to see how Donna responds. Every answer streams live to your pen's OLED screen.

Donna AI Answer Mode
What is the speed of light?
The speed of light is 299,792,458 m/s — the universal speed limit, constant for all observers regardless of motion.
Can anything travel faster?
No known particle with mass can reach light speed. Tachyons are hypothetical faster-than-light particles but remain unobserved and may violate causality.
Help me understand photosynthesis for my bio test
1. Light absorption — Chlorophyll captures sunlight.
2. Water splitting — H₂O releases O₂ (the air we breathe).
3. Sugar production — CO₂ + H₂O + light → glucose + O₂

Memory trick: Plants eat light, breathe out life.
Summarize breakthroughs in quantum computing
Google Willow — 105-qubit chip solved in 5 min what classically takes 10 septillion years.

Error correction milestone — Logical qubits now outperform physical qubits for the first time.

Microsoft — Targeting fault-tolerant topological qubits by 2026.
Write an opening line for a sci-fi novel about a thinking pen
The pen had been silent for eleven years — and then, on the morning of the blackout, it whispered the name of the person who would end the war.
Translate "The early bird catches the worm" to 3 languages
Spanish: “A quien madruga, Dios le ayuda.”
French: “L'avenir appartient à ceux qui se lèvent tôt.”
Japanese: “早起きは三文の当たり”
Hold the button on your Nexus Pen to ask anything...
Audio Quality

Crystal Clear Voice

The Nexus Pen uses a premium MAX98357A amplifier with a Dayton Audio speaker. Donna sounds like she's right next to you.

Typical Smart Pens

  • Tinny, low-volume speaker
  • 8kHz audio quality
  • Robotic synthesized voice
  • Noisy microphone pickup
  • 5+ second response delay
VS

Nexus Pen

  • High-fidelity speaker + premium amp
  • 24kHz wideband audio
  • OpenAI TTS natural voice
  • Digital I2S noise-free microphone
  • Under 2 second response
Donna's voice — live response
24kHz • I2S Digital • OpenAI TTS-1
Amplifier
MAX98357A
Speaker
Dayton CE32A-8
Sample Rate
24,000 Hz
Interface
I2S Digital
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Meet Donna — your AI assistant that helps you learn faster, answer quicker, and write better.

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