# Kelvin: Cold Plunge Tracker — Ice bath & plunge timer

> Ice bath & plunge timer (iPhone/iPad app by Adelyons Software LLC.)

- Source: https://appshunter.io/ios/app/kelvin-cold-plunge-tracker/id6785230298 (this page in markdown: same URL + `.md`)
- Developer: [Adelyons Software LLC](https://appshunter.io/developer/1889366918)
- Category: Health & Fitness, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.0 · 27 MB
- Languages: American English
- Released: 2026-07-03
- Data updated: 2026-08-24
- User reviews in markdown: https://appshunter.io/ios/app/kelvin-cold-plunge-tracker/id6785230298/reviews.md

## What is Kelvin?

Kelvin is a hardware-agnostic cold-exposure tracker — 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 — ice bath, cold shower, lake, or chest-freezer tub. Kelvin owns the practice, not the tub.

Master the cold — on any tub, shower, or lake. Every second in the cold, counted.

WHY PLUNGERS CHOOSE KELVIN
• 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 — the basics the category leader still misses.
• Works with any cold source — no hardware, no pairing, no router, no $5,000 tub. Ice bath, shower, lake, freezer: pick a source and start.
• Safety guardrails the whole category ignores — 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.
• Works offline, opens instantly — local-first, no account, nothing to crash.

FREE FOREVER
• The Plunge timer: breath-up, plunge countdown with first-30s cold-shock coaching, and a guided warm-up — for any cold source
• Log sessions: temperature (C/F), duration, water source, how you felt, post-plunge clarity and mood
• Streaks and a calendar heatmap: current and longest streak, total time-in-cold, longest plunge, weekly minutes
• Breathwork trainer: box breathing and Wim-Hof-style rounds, with the safety lock that never lets you breath-hold in or before water
• Safety guardrails: cold-shock and afterdrop guidance, exposure ramp, and contraindication warnings — free, never paywalled
• Protocols library: beginner ramp, Wim-Hof-style, contrast (sauna to cold), athletic recovery
• 90-day history, CSV export, local backup and restore
• Large text, high contrast, reduced motion — accessibility is free

KELVIN+ (OPTIONAL, 100% ON-DEVICE)
• 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
• On-device AI coach digest: a plain-language weekly recap and a personalized next-week ramp — your data never leaves the phone
• Custom protocols and contrast builder, plus sauna and heat sessions
• Goals and challenges and shareable streak cards
• Unlimited history and advanced stats

Built to be your cold plunge tracker, ice bath timer, cold exposure log, and breathwork trainer — all in one trustworthy place, on any cold source.

Kelvin is not medical advice. Cold exposure carries real risks — 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

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Kelvin+ Annual | $19.99 | per year |
| Kelvin+ Monthly | $3.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Kelvin+ Lifetime | $39.99 | one-time |



## Version history (last 4 releases)

### 1.0.3 — 2026-08-09

Polish: the app now asks for a rating at a better moment, and never more than once a month.

### 1.0.2 — 2026-08-03

Safety guidance that was written, tested — and never shown to anyone.

• The cold-shock, afterdrop, exposure and contraindication warnings the listing promises are now on the timer where you can see them. The engine existed and was fully tested, but nothing in the app ever called it. It also now asks the health questions it needed, because it could not warn about a heart condition or pregnancy it was never told about. Safety guidance is free, always.
• A breathwork trainer with guided rounds, locked until you confirm you are on dry land — breath-holds in or near water cause shallow-water blackout.
• Every session used to save the same hardcoded temperature, water source and clarity score. You can now log what actually happened, which also means the Pro tolerance trend is computed from real data.
• CSV export, accessibility settings and onboarding that remembers you.

Questions or ideas: dev@adelyons.com

### 1.0.1 — 2026-07-23

New in 1.0.1: log sessions with your voice. Ask Siri to log your plunge and Kelvin records it — no wet hands on the screen. Plus small fixes and polish. Got a wish for Kelvin? Email dev@adelyons.com — we read every note.

### 1.0 — 2026-07-03

No release notes.

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All apps by Adelyons Software LLC: https://appshunter.io/developer/1889366918

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-24.*