Case Study // Public Product 001
Titan
An on-device athletic recovery coach for iPhone and Apple Watch.
Product thesis
Built for a specific user, with privacy as product strategy.
Titan turns HealthKit signals into private recovery and exertion guidance. It calculates HRV, resting-heart-rate trends, training load, and behavioral context on the device, then turns that into a daily coaching brief without collecting user data.
Audience
Athletes and serious amateurs who want recovery guidance without a cloud fitness profile.
Privacy stance
No collected app data; machine-learning and coaching flows are designed to run on-device.
Public proof
Public App Store listing with iPhone and Apple Watch support, optional Pro unlocks, and launch-ready product positioning.
Architecture
Product stack
Public, high-level architecture only. Private development systems stay out of the public surface.
Native Apple
- Swift 6
- SwiftUI
- HealthKit
- watchOS
Intelligence
- Core ML
- Apple Foundation Models
- On-device AI
Commerce
- StoreKit 2
- Founders Edition
- Subscriptions
Proof of craft
Recovery science
HRV, resting heart rate, and training load combine into a readiness signal athletes can act on.
Behavioral context
Tags for stress, travel, caffeine, and habits explain why the score moved.
Private by architecture
Sensitive body data stays on the phone instead of becoming a vendor-side profile.