Mountain Stream Cold Tracker vs Kelvin
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Mountain Stream Cold Tracker
Read full descriptionHide full description
Welcome to Mountain Stream. This is where you challenge the cold. This is where you build discipline. This is where you strengthen your mind and body. Are you ready to step up? Key Features: Precision Tracking: Record every session with exact details on type, duration, and temperature. Track your progress. See your transformation. Apple Watch Integration: Use your Apple Watch. Track your heart rate and water temperature. Sync all session data between iPhone and Apple Watch. Simple. Effective. Apple Health integration: Save water temperature and heart rate data to Apple Health, seamless. Protocols for Every Level: Whether youβre starting out or advancing, our library of protocols guides your journey. Choose your challenge. Improve with every session. Custom Tools: Customize your timers to fit your training needs. Add your own protocols. Go harder or softer, tailor the app to your goals. Progress Overview: Access your summary screen. Analyze your dataβdaily, weekly, monthly. Maintain your streak. Set targets. Hit them. Detailed Analytics: Review comprehensive stats. Understand your performance. Adjust your approach. Optimize your results. Session Management: Select your protocol. Define your limits. Custom interval timers helps you to push your limits. Subscription Benefits: Subscribe for full access. Unlock advanced features like enhanced timers, Unlimited protocols, seamless data syncing between watch and phone, data backup and manual session entry. Elevate Your Health: Monitor key metrics. Push your limits. Stay informed. Stay in control. Join Mountain Stream. Commit to the discipline. Challenge the cold. Build strength. This is your path to becoming a master. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Kelvin
Read full descriptionHide full description
Kelvin is a hardware-agnostic cold-exposure tracker β a gorgeous plunge timer, a session log with history and streaks, a breathwork trainer, and adaptation insights. Not a tub remote. Works with ANY cold source β ice bath, cold shower, lake, or chest-freezer tub. Kelvin owns the practice, not the tub. Master the cold β on any tub, shower, or lake. Every second in the cold, counted. WHY PLUNGERS CHOOSE KELVIN β’ A real timer, log and history that actually work. Breath-up rounds, a plunge countdown with a first-30s cold-shock breathing coach, and a guided warm-up. Built to log every session β the basics the category leader still misses. β’ Works with any cold source β no hardware, no pairing, no router, no $5,000 tub. Ice bath, shower, lake, freezer: pick a source and start. β’ Safety guardrails the whole category ignores β cold-shock and afterdrop guidance, a sensible exposure ramp, contraindication warnings, and a hard lock on breath-holds in or before water. Free, never paywalled. β’ Works offline, opens instantly β local-first, no account, nothing to crash. FREE FOREVER β’ The Plunge timer: breath-up, plunge countdown with first-30s cold-shock coaching, and a guided warm-up β for any cold source β’ Log sessions: temperature (C/F), duration, water source, how you felt, post-plunge clarity and mood β’ Streaks and a calendar heatmap: current and longest streak, total time-in-cold, longest plunge, weekly minutes β’ Breathwork trainer: box breathing and Wim-Hof-style rounds, with the safety lock that never lets you breath-hold in or before water β’ Safety guardrails: cold-shock and afterdrop guidance, exposure ramp, and contraindication warnings β free, never paywalled β’ Protocols library: beginner ramp, Wim-Hof-style, contrast (sauna to cold), athletic recovery β’ 90-day history, CSV export, local backup and restore β’ Large text, high contrast, reduced motion β accessibility is free KELVIN+ (OPTIONAL, 100% ON-DEVICE) β’ Adaptation insights: your cold-capacity curve, the temperature-by-duration tolerance trend, time-in-cold banked this month, best time of day, and mood correlation β’ On-device coach digest: a plain-language weekly recap and a personalized next-week ramp β your data never leaves the phone β’ Custom protocols and contrast builder, plus sauna and heat sessions β’ Goals and challenges and shareable streak cards β’ Unlimited history and advanced stats Built to be your cold plunge tracker, ice bath timer, cold exposure log, and breathwork trainer β all in one trustworthy place, on any cold source. Kelvin is not medical advice. Cold exposure carries real risks β cold shock, afterdrop, and, with breath-holds in or near water, shallow-water blackout and drowning. Consult a doctor before starting, especially with a heart condition, high blood pressure, or during pregnancy. Privacy Policy: https://adelyons.com/apps/kelvin/privacy.html Terms of Use: https://adelyons.com/apps/kelvin/terms.html
Screenshots
Verdict
Mountain Stream Cold Tracker and Kelvin are too close to call on the numbers: across 5 compared parameters β price, ads, in-app purchases and device support among them β neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Mountain Stream Cold Tracker sells 2 in-app purchases, starting at $1.99 per month and Kelvin sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.
| Parameter | Mountain Stream Cold Tracker | Kelvin |
|---|---|---|
| Price | Free | Free |
| Update frequency | β | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Requires iOS | 17.0 | 16.0 β better |
| Further details β not scored | ||
| Size | 5 MB | 28 MB |
| Age rating | 4+ | 4+ |
| Developer | Kasper Kraegpoeth | Adelyons Software LLC |
In-app purchases
Mountain Stream Cold Tracker
- Premium Monthly$1.991 Month
- Premium Annually$17.991 Year
Kelvin
- Kelvin+ Monthly$3.991 Month
- Kelvin+ Annual1 Year trial$19.991 Year
- Kelvin+ Lifetime$39.99
Questions
Is Mountain Stream Cold Tracker free?
Is Kelvin free?
Do Mountain Stream Cold Tracker or Kelvin have ads?
Other comparisons















