Coldsmith: cold exposure and breathwork on iOS
A production note on shipping cold-exposure timers, guided breathwork, streak tracking, HealthKit, and subscriptions in one iOS product.
Product delivery case study — not an agent deployment result.
Coldsmith is a focused wellness application for cold-exposure and breathwork practice. It combines guided sessions, timers, and repeat-use tracking without turning a simple routine into an overloaded platform.
What I shipped
Guided breathwork sessions
Cold-plunge and ice-bath timers
Streak and session tracking
HealthKit integration
Subscription paywalls and production release infrastructure
Outcome
Coldsmith was released as a production iOS product. No retention, health, speed, or engagement result is published here because the repository does not contain evidence suitable for supporting one.