Live Demo

Meet Donna

The AI assistant inside your Nexus Pen. Hold the button, ask anything out loud — the answer appears on the pen's screen and Donna speaks it back in a natural voice.

Try the Demo Get Nexus Pen
2s avg response time
5 AI modes
16kHz audio fidelity
24/7 always ready
60-Second Demo

Watch Donna in Action

Real pen, real questions, real answers — no cuts.

Nexus Pen — Donna demo video
Example Conversations

See Donna in Action

Select a mode to see how Donna responds. Every answer streams live to your pen's color 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.
Why did the Roman Empire fall?
Historians point to several forces working together:

Overexpansion — borders too long to defend, armies stretched thin.
Economic strain — heavy taxation, inflation, and reliance on slave labor.
Political instability — 20+ emperors in 75 years during the Crisis of the Third Century.
External pressure — Gothic and Vandal invasions culminating in the sack of Rome, 410 AD.

Want me to go deeper on any of these?
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.
How do I say "Where is the library?" in Spanish, French, and Japanese?
Spanish: ¿Dónde está la biblioteca?
French: Où est la bibliothèque ?
Japanese: 図書館はどこですか？ (Toshokan wa doko desu ka?)

I can say any of these out loud so you can hear the pronunciation.
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.

This is the real voice that comes out of the pen.

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
  • 16kHz wideband audio
  • Natural, human-like voice
  • Digital I2S noise-free microphone
  • Under 2 second response
Donna's voice — live response
16kHz • I2S Digital • Studio-grade voice
Amplifier
MAX98357A
Speaker
Dayton CE32A-8
Sample Rate
16,000 Hz
Interface
I2S Digital
Ready to Try Donna?

Your AI Assistant Is Waiting

Donna lives inside the Nexus Pen — ask out loud, hear the answer, ace the class.

Get Nexus Pen — $119 View All Plans

Join before launch: 10% off • pen-giveaway entry • free month of Donna Plus with your pen • No payment required