Dead-simple start & stop
Giant START. Press-and-hold STOP so a wet hand can't ruin the run. Timer survives backgrounding, screen lock, and force-quits.
Track the chill.
Honor the heat.
ChillSeeker is a cold plunge and sauna session tracker for iPhone and Apple Watch. Local-first. No account. No analytics. Try every feature free for 7 days, then $4.99 to unlock forever.
Requires iOS 17 or later · iPhone, with optional Apple Watch
See it in motion
Everything you need.
Nothing you don't.
Cold plunge & sauna
One engine, two modalities, separate stats and streaks. Switch in a tap.
Apple Watch companion
Start and stop a session right from your wrist. Live heart rate via HKWorkoutSession. Sessions sync back to your iPhone over WatchConnectivity.
Breathwork on tap
Box, 4-7-8, Power Breaths, Calm Down, Coherent. Attach a length-matched warm-up to any session.
Hands-free with Siri
"Hey Siri, start a ChillSeeker session." Stops, too. Or assign the Action Button (iPhone 15 Pro+) to start in one press.
Schedule on your calendar
Pick a time, a session type, and how far in advance you want a reminder. Events live in your default calendar so reminders fire even if the app isn't running.
Bluetooth thermometer
Pair any thermometer that broadcasts the standard Bluetooth Health Thermometer profile. Most spa and probe thermometers Just Work — temperature pre-fills automatically.
On-device coach
Ask about cold temperatures, durations, contrast therapy, or workout stacking. Or say "build me a routine" and the engine grounds it in your last few sessions. Runs entirely on-device — no chatbot, no servers.
Honest insights
Eight Swift Charts: sessions over time, duration, temperature, heart rate, HRV, mood delta, time of day, day-of-week heatmap. Plain-language insights, never medical claims.
Goals & streaks
Weekly, monthly, or all-time goals per modality. One rest day per week before a streak breaks — the rule is right there in Settings.
Badges that mean something
23 starter badges across streaks, milestones, endurance (2/3/5-minute plunges, 15/20/30-minute saunas, sub-3°C), exploration, and consistency. Each unlocks with a real celebration moment.
Reflection journal
Quick post-session comment or a longer entry with mood and a photo. Link to a session or stand alone.
Smart suggestions
Rules-based, conservative, and progressive. Eases beginners in. Backs off when recovery signals (HRV, perceived difficulty, feeling-after) trend poorly. Never prescriptive.
Apple Music
Search a song or playlist and play it during your session. Lock-screen controls, Now Playing widget — handled by the system player.
Apple Health
Reads heart rate, HRV, and body temperature. Writes completed sessions as workouts and breathwork as Mindful Minutes.
Local-first, by design
Everything lives on your device. No account. No analytics. No third-party trackers. Export your data anytime as JSON or CSV.
Your data stays on your device.
ChillSeeker has no servers. There's no account to create, no email to enter, no analytics SDK, no third-party tracking. Your sessions, journal entries, and health data are stored locally in SwiftData. Apple Health integration is read/write on-device only.
A word on safety.
ChillSeeker is a general-wellness tracker. It is not a medical device, and the information and suggestions in the app are not medical advice. Cold-water immersion and sauna use carry real physiological risks. Consult a qualified doctor before starting either practice, especially if you have a heart condition, blood pressure issues, are pregnant, or have any ongoing medical concern. Never plunge alone. Stop immediately and seek help if you feel unwell.
The app is intended for users aged 17 and over. Full disclaimers, risk information, and limitation of liability are presented during onboarding and available any time in the app under Settings → Disclaimers & Safety.
Pricing
7 days free
$4.99
- Try every feature for 7 days, no card required
- Single in-app purchase — never a subscription
- Family Sharing not enabled (sorry, costs us per seat at this price)
- Cancel any time during the trial — uninstall and you're done
Ready to track the chill?
ChillSeeker is live on the App Store. 7 days free, then $4.99 to unlock forever.
Download on the App Store →