The Apple Watch app for cold plunges and ice baths.
Your phone shouldn't be near water. TrackCold runs standalone on Apple Watch — start the ritual from your wrist, feel haptic phase transitions, leave the iPhone dry on the deck. Sessions sync via iCloud when both devices are online.
02:30
Round 2 of 4
On your iPhone
Every Watch session lands in your Saga.
Start on the wrist, review on the phone: total and cold time, rounds, water temperature, the phase timeline, and the heart rate Apple Watch recorded during the session.
Why the wrist
Your phone shouldn't be near water.
The cold plunge ritual is wet, slow, and fingers-numb. Reaching for an iPhone with frozen hands — if you can find it, if you can unlock it, if you didn't drop it — is the friction that ends most practices. The Watch is already on your wrist. It already survives a polar plunge. That's where the timer should live.
Standalone — no iPhone required
Tap the complication, pick a ritual, start the timer. Your phone can stay in the warm car. Sessions sync to iPhone via iCloud the next time both are online.
Haptic phase transitions
A wrist tap tells you when the cold phase is up. No screen-staring, no audio over wind. Eyes closed, breathing slow, attention on the body.
Always-On display
The timer face stays visible mid-session at low power. Lift-to-wake works too — but the Always-On view means you don't have to.
Complications + Smart Stack
Pin TrackCold to your watch face for one-tap starts. Smart Stack widget surfaces it before your usual plunge time.
How it works on watchOS
The full ritual, on your wrist.
Start from a complication
Pin TrackCold to your watch face. One tap launches the ritual picker. Pick a saved Ritual or start fresh — the whole flow is wrist-native.
Feel every phase change
Strong haptic taps at the start of each cold phase, the start of each hot phase, and the end of the session. Different patterns so you can tell them apart without looking.
Multi-round, watch-native
Run the same multi-round contrast protocols from the Watch. The face shows current round, current phase, and time remaining — at a glance, low-power.
Apple Health sync
Sessions write to Apple Health as Mindful Minutes + Other workouts. Recovery context flows into your daily activity ring.
iCloud sync to iPhone
Your Saga (history) updates on both devices. Start a session on the Watch, review it on the iPhone later — same data, encrypted in your iCloud.
Apple Watch Ultra ready
Stronger haptics, deeper water resistance, brighter Always-On display. The Ultra is the ideal Watch for cold practice — and TrackCold takes advantage of it.
Heart rate, at no cost
Your heart rate during the session, with average cold-phase and warm-phase figures in the summary afterwards. Free on every tier — it used to be an Asgard feature and isn't any more.
Water Lock, the way watchOS intends
Turn on Water Lock before you get in and the screen ignores the water. The session keeps running underneath; the crown clears it when you're out.
What the face actually shows
Phase name, time remaining in that phase, round x of y, and your heart rate — in a low-power layout that stays readable with the wrist down and the screen dimmed.
Compared
vs the alternatives.
| Feature | TrackCold (Watch) | Phone-only timer | Garmin / other ecosystems | No tracking |
|---|---|---|---|---|
| Standalone on wrist (no phone needed) | ||||
| Cold-specific haptic phase cues | ||||
| Always-On display optimized | ||||
| Apple Health (HealthKit) sync | ||||
| Multi-round contrast on Watch | ||||
| Complications + Smart Stack | ||||
| iCloud sync between iPhone + Watch | ||||
| Native to Apple ecosystem | ||||
| Privacy: history stays in your iCloud |
Compared
vs other cold plunge apps.
What each app's own App Store listing says it does. Where a listing doesn't mention a feature, we mark it as not stated rather than guess.
| Feature | TrackCold | GoPolar | Brisk | Ultra Plunge | IceBuddy | Plunge (official) |
|---|---|---|---|---|---|---|
| Price | Free · $4.99/mo · $34.99/yr · $149.99 lifetime | Free · $6.99/mo · $39.99/yr | Free · $4.99/mo · $39.99/yr | 7-day trial, then $4.99/mo · $39.99/yr · $59.99 lifetime | Free · Premium $6.99–$59.99 | Free, no in-app purchases |
| Apple Watch app | ||||||
| Contrast (hot/cold) sessions | — | — | ||||
| Apple Health logging | — | |||||
| Streaks or challenges | ||||||
| Session notes | — | — | — | — | ||
| CSV export | Asgard | — | — | — | — | — |
| Data stored in your own iCloud | — | — | — | — |
✓ stated in the app's App Store listing (description, compatibility, or release notes) · ✗ the listing shows no Apple Watch app · — not stated in the listing. US listings checked September 19, 2026. Prices and features change, so check each listing for current details.
Wrist protocols
Three sessions to start with — all wrist-led.
Save any of these as a Ritual on your iPhone and they appear on the Watch face complication for one-tap starts.
Open-water plunge
Single-phase 2–4 minute timer with a 30-second warmup countdown. Ultra-friendly. Great for lake or sea.
Health benefits →Sauna ↔ ice contrast
Multi-round mode with 12-min hot, 2-min cold phases × 4. Haptic transitions handle the switching.
Cold plunge timer →Daily cold shower
60-second cold shower as part of the Awakening 7-day quest. Set the watch on the bathroom counter.
Plunge tracker →Before you download
What it doesn't do
Worth knowing before you spend anything, rather than after.
- It's Apple-only. iPhone on iOS 17 or later and Apple Watch on watchOS 10 or later. There is no Android app, no Wear OS app, and no web app that syncs with it. If your watch isn't an Apple Watch, this isn't the app for you.
- It isn't iPad-native. An iPad runs it in iPhone compatibility mode. It works, but nothing is designed for that screen.
- The watch history is short on the free tier. The Saga on your wrist lists your last 3 sessions free and your last 20 on Asgard. The complete history is always on the iPhone, on every tier, at no cost — the watch limit is about what's useful on a 45mm screen, not about withholding your data.
- It measures what you did, not what it achieved. Duration, rounds, water temperature you enter, heart rate from the Watch. It does not estimate recovery, readiness or any physiological state, and it cannot show that a session caused an outcome.
- There is no social layer. No account, so no feed, no friends, no leaderboard. If you want a community around your practice, other apps do that and this one deliberately doesn't.
For how that lines up against the other cold-plunge apps on the App Store, see the sourced comparison of six trackers.
FAQ
Watch questions, answered.
Now on the App Store.
Free to download — and the Apple Watch app, heart rate included, is free too. Asgard adds recovery insights from your Apple Health history, with a 7-day free trial for new subscribers.
Want to learn more first? Read the cold-exposure knowledge base →
More on TrackCold: Cold plunge timer · Ice bath timer · Cold plunge tracker