Comparison

ColdLog vs Cold Mastery

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

ColdLog

Features
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ColdLog โ€“ Cold Plunge Tracker One tap. One plunge. All the data you need. ColdLog is the simplest way to track your cold plunge and ice bath sessions on Apple Watch. No complicated setup, no unnecessary features โ€“ just start your workout and let your Watch capture everything automatically. DESIGNED FOR APPLE WATCH ULTRA ColdLog is built with Apple Watch Ultra users in mind. Use the Action Button to instantly start your cold plunge session โ€“ even with wet hands. Add the watch face complication for one-tap access. Water Lock activates automatically when you enter the water. COMPREHENSIVE DATA COLLECTION Every plunge tells a story. ColdLog captures more data than any other cold plunge app: - Water Temperature โ€“ Live readings from Apple Watch sensors - Duration โ€“ Precise timing of every session - Heart Rate โ€“ Continuous monitoring throughout your plunge with detailed graph - Calories Burned โ€“ Science-based calculation using cold-induced thermogenesis research - GPS Location โ€“ See where you plunge on the map - Weather Conditions โ€“ Outside temperature, humidity, and conditions (Pro) - Workout Route โ€“ Sessions appear in Apple Fitness with full route SCIENTIFICALLY ACCURATE CALORIE CALCULATION Unlike other apps that guess your calorie burn, ColdLog uses peer-reviewed research on cold water immersion. The formula accounts for water temperature, session duration, your personal BMR, and post-immersion thermogenesis โ€“ that "afterburn" effect when your body continues burning calories after you exit. INSIGHTS & ANALYTICS (PRO) Track your progress with beautiful monthly charts: - Time in Water โ€“ See your total cold exposure - Temperature Trends โ€“ Track how cold you're going - Heart Rate Patterns โ€“ Monitor your body's adaptation - Energy Burned โ€“ Visualize your calorie expenditure - Cold Stress Score โ€“ Measure your overall cold exposure intensity SEAMLESS SYNC Start a session on your Watch, view details on your iPhone. Everything syncs automatically via WatchConnectivity. All data stays private on your devices and in Apple Health โ€“ no accounts, no cloud, no tracking. CAPTURE & SHARE YOUR PLUNGES Add up to 3 photos to each session โ€“ build your personal cold plunge album. Frozen lake? Ice hole? Ocean sunrise? Capture those epic moments. Ready to share? Choose from multiple card styles: a clean stats-only card or stunning photo overlays with your session data. Share to Instagram, WhatsApp, or anywhere else. Each card shows your water temperature, duration, weather, and location. KEY FEATURES - One-tap workout start from Apple Watch - Action Button support (Apple Watch Ultra) - Watch face complication for quick access - Automatic Water Lock activation - Timer alerts with haptic feedback (Pro) - Auto-save option for hands-free workflow - Session photo gallery (up to 3 photos) - Custom share cards with photo overlays - Personal notes for each session - HealthKit integration - Celsius & Fahrenheit support - No account required - Offline-first design WHO IS COLDLOG FOR? Whether you're a Wim Hof method practitioner, cold water therapy enthusiast, competitive ice swimmer, or just starting your cold exposure journey โ€“ ColdLog helps you track progress and stay consistent. Built by cold plunge enthusiasts who wanted an app that works as simply as stepping into cold water. No bloat. No distractions. Just you, the cold, and your data. FREE TO USE ColdLog is free with all core features โ€“ track duration, water temperature, heart rate, calories, and GPS location. History is limited to 3 sessions. Upgrade to Pro for unlimited session history, detailed insights with charts, weather tracking, and timer alerts. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://coldlog.eu/privacy/

About

Cold Mastery

Features
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Master the cold โ€” one session at a time. Cold Mastery is your guided companion for cold showers, ice baths, and cold plunges. No method dogma, no guru subscription โ€” a precise tool that turns your intention into a daily practice. THE COMPLETE PRACTICE ON iPHONE โ€ข Timer with adjustable lead-in and voice coach โ€ข Guided breathing exercise (Box Breathing, Power Breathing, and more) before each session โ€ข 3 training programs โ€” from beginner to Cold Master โ€ข Streak tracking with milestones and daily goals โ€ข Temperature tracking for every session โ€ข Session history, calendar, and progress charts WITH APPLE WATCH: MEASURED LIVE Wearing a Watch adds the crucial layer โ€” in the shower, in the plunge, and in open water: โ€ข Direct access from the watch face โ€” two taps and your session is running โ€ข Haptic countdown pulses every 15 or 30 seconds โ€” close your eyes, focus on your body โ€ข Live heart rate during the session: see your cold shock response in real time โ€ข Recovery phase with HR recovery tracking after the cold โ€ข Water Lock for safe wear underwater PROGRESS YOU CAN MEASURE Cold Mastery doesn't just show you how long you lasted โ€” it shows how your body adapts: โ€ข Peak heart rate trend: your cold shock response decreases over weeks โ€ข Recovery rate: how quickly your heart rate returns after the cold โ€ข Endurance: from 15 seconds to Cold Master PROGRAMS THAT CARRY YOU Three evidence-based training programs give your practice structure: โ€ข Cold Starter โ€” your entry point with short cold showers โ€ข Cold Seeker โ€” increase duration and intensity step by step โ€ข Cold Master โ€” for the experienced: ice baths, plunges, and longer exposures YOUR DATA STAYS YOURS โ€ข No account required โ€” no profile, no email โ€ข No data sent to external servers โ€” your sessions stay on your devices โ€ข Private iCloud sync between iPhone and Watch COLD MASTERY PRO The core features with cold showers, timer, and streak are free. Pro unlocks: โ€ข All session types (ice bath, cold plunge, open water) โ€ข Guided breathing exercise with voice coach โ€ข Detailed progress charts (HR trends, recovery rate) โ€ข Training programs Not a medical device. Cold exposure carries risks โ€” educate yourself and listen to your body. Not suitable for certain cardiovascular conditions, asthma, or during pregnancy. When in doubt: consult a doctor. Terms of Use (EULA): https://coldmastery.com/en/terms Privacy Policy: https://coldmastery.com/en/privacy

Screenshots

ColdLog4 screens
Cold Mastery4 screens

Verdict

The call

The clearest difference is update cadence: Cold Mastery at every 3 days against ColdLog's weekly. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. ColdLog sells 1 in-app purchase, starting at $8.99 per year and Cold Mastery sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

ColdLog ships an update weekly, Cold Mastery every 3 days. The most recent releases landed on September 27, 2026 and September 9, 2026 respectively.

Scorecard1 real difference ยท 5 level
ColdLog versus Cold Mastery: the parameters behind the verdict, then further details
ParameterColdLogCold Mastery
PriceFreeFree
Update frequencyWeeklyEvery 3 days โ€” better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad, Apple Watch โ€” betteriPhone, Apple Watch
Requires iOS17.017.0
Further details โ€” not scored
Size17 MB15 MB
Age rating4+4+
DeveloperJRSW s.r.o.Fabian Weiss

In-app purchases

1 purchases

ColdLog

Subscriptions1
  • ColdLog PRO$8.991 Year
3 purchases

Cold Mastery

Subscriptions2
  • Pro Monthly$4.991 Month
  • Pro Yearly$29.991 Year
One-time1
  • Pro Lifetime$49.99

Questions

Is ColdLog free?
ColdLog is free to download, with in-app purchases available.
Is Cold Mastery free?
Cold Mastery is free to download, with in-app purchases available.
Do ColdLog or Cold Mastery have ads?
Neither ColdLog nor Cold Mastery shows ads.
Which is updated more often, ColdLog or Cold Mastery?
ColdLog ships an update weekly, and Cold Mastery every 3 days. Most recently, ColdLog was updated on September 27, 2026 and Cold Mastery on September 9, 2026.

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