Pulsyn
Privacy-First Smart Ring. On-Device AI.
PPG, SpO2, skin temperature, 3-axis accelerometer. On-device AI runs as Milo, a conversational health assistant built on PRANA 0.7B. Core tracking is free forever. Reserve your slot for $10, ships at $160. Q3 2026.
Built for Precision
Every detail engineered for accuracy, durability, and comfort.
Premium Quality
Grade 5 Titanium shell with hypoallergenic resin inner. Weighs 2.4 to 4g depending on size.
7-Day Battery
Up to 7 days per charge. The included case extends total battery life to roughly 60 days.
5ATM Waterproof
Rated to 50 meters. Swim, shower, and train without taking it off.
Encrypted and Private
SQLCipher AES-256 local storage. Health data never leaves the device unencrypted.
Clinical-Grade Sensors
PPG, SpO2, skin temperature, and a 3-axis accelerometer. All processed on-device.
2-Year Warranty
2-year warranty on the Rune 1, 1-year on accessories.
Three Finishes
Same ring, three characters. Titanium Silver ships brushed. Obsidian Black ships matte. Champagne Gold ships polished.
Titanium Silver
BRUSHED FINISH
The everyday default. A clean brushed face that reads understated.
Obsidian Black
MATTE FINISH
Flat matte black. Disappears on the finger.
Champagne Gold
POLISHED FINISH
A warm mirror finish. Catches light without shouting.
Meet Milo
Milo is an on-device AI health assistant built on PRANA 0.7B, our in-house trained small language model. It reads your sleep, HRV, and activity data and gives plain-language feedback. No internet required, no data sent out.
On-Device PRANA 0.7B
Runs entirely on your phone. Health insights, sleep breakdowns, readiness scores. No subscription, no cloud, no compromises.
Cloud AI
Optional. Cloud-enhanced analysis for deeper patterns and cross-device sync. End-to-end encrypted. You hold the keys.
The Tradeoffs Are Obvious
One founder, one product, no VC money.
Fair Pricing
- Ships at $160, retail is $200
- Core health tracking is free forever
- Optional Pro tier at $6/month for cloud AI and sync
Privacy by Design
- Health data stays on your device by default
- Cloud sync uses zero-knowledge encryption (Frankfurt, Germany)
- Governed under Finnish law with full GDPR protections
Full Control
- One founder, no VC money, no data brokerage
- Cancel pre-order anytime before shipment for a full refund
- Pay with cards or crypto. BTCPay supports BTC, ETH, USDT, XMR