Features
Everything you need to track, measure, and optimize your heat and cold therapy practice — from real-time biometrics to AI-powered insights.
Session Tracking
5 Exposure Types
Track sauna, steam room, cold plunge, cold shower, and guided relax sessions — each with dedicated timers and metrics.
Multi-Phase Sessions
Seamlessly transition between exposure types within a single session. Each phase is automatically segmented and tracked.
Timer with Pause & Resume
Full session control with pause and resume. Set optional duration targets and get notified when you hit your goal.
Real-Time Health Monitoring
Live Heart Rate
Stream your heart rate in real time directly from Apple Watch during every session with jitter-dampened delivery.
Blood Oxygen (SpO2)
Monitor blood oxygen saturation live on your wrist — track how your body responds to heat and cold exposure in real time.
Active Calorie Tracking
See calories burned in real time, powered by Apple Watch's HealthKit workout integration during your sessions.
HCEI Scoring
HCEI Score (0–100)
Our proprietary Heat-Cold Exposure Index combines five weighted components — duration, HRV adaptation, HR reactivity, transitions, and safety — to rate your session's effectiveness.
Live + Finalized Scoring
Get a real-time HCEI score on your Watch during the session, then a finalized score once HRV enrichment data arrives for full accuracy.
Recovery & Insights
HRV Recovery Analysis
See how your sessions impact heart rate variability with tiered confidence levels — from 15-minute to nightly measurement windows.
Sleep Impact Tracking
Correlate your therapy sessions with sleep quality by automatically comparing the night before and after each workout.
AI Coaching
Per-Workout AI Insights
Receive personalized analysis after each session based on your metrics, HCEI score, and historical patterns.
Weekly AI Summaries
Get a weekly wellness digest with trends, science-backed recommendations, and progress highlights powered by AI.
Goals & Streaks
Customizable Goals
Set weekly targets for session count, total minutes, or specific exposure types. Track progress with visual indicators.
Streak Tracking
Build and maintain streaks with visual weekly progress. Stay motivated and never break the chain of your practice.
Apple Watch
Watch-as-Authority
Your Apple Watch creates the HealthKit workout and streams live biometrics. iPhone mirrors the session in real time for a seamless experience.
Light Mode (iPhone-Only)
No Apple Watch? No problem. Start sessions directly from your iPhone and enrich with data from any HealthKit wearable — Oura, Garmin, WHOOP, and more.
Widgets & Live Activities
Home & Lock Screen Widgets
Glance at your latest session, weekly progress, and streaks right from your Home Screen or Lock Screen.
Dynamic Island & Live Activity
See your active session timer, heart rate, and HCEI score on the Dynamic Island and Lock Screen in real time.
Health Enrichment
Post-Workout Enrichment
After each session, SaunaTracker Pro automatically queries HealthKit for HRV, sleep, blood pressure, glucose, and temperature data.
Works with Any Wearable
Enrichment pulls data from any HealthKit-compatible source — Oura, Garmin, WHOOP, Fitbit, and more — not just Apple Watch.
Mood & Wellness
Pre/Post Session Mood
Log how you feel before and after sessions using Apple's State of Mind framework. Track emotional wellness alongside physical metrics.
Data & Privacy
Privacy-First Design
All data stays on your device with optional iCloud sync. No accounts required, no third-party tracking, no ads — your health data belongs to you.