# Frost: Cold Plunge Care — Chlorine & Peroxide Dosing

> Chlorine & Peroxide Dosing (iPhone/iPad app by Roman Kopaliani.)

- Source: https://appshunter.io/ios/app/frost-cold-plunge-care/id6776702484 (this page in markdown: same URL + `.md`)
- Developer: [Roman Kopaliani](https://appshunter.io/developer/1635315269)
- Category: Health & Fitness, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: Dutch, English, French, German, Italian, Japanese, Spanish
- Released: 2026-06-10
- Data updated: 2026-07-17
- User reviews in markdown: https://appshunter.io/ios/app/frost-cold-plunge-care/id6776702484/reviews.md

## What is Frost?

Pay once. No subscription, no ads, no account. Works offline.

Frost is the iOS cold plunge water-chemistry assistant. Enter your sanitizer and pH readings, get exact doses scaled to your plunge's volume. Whether you run chlorine or hydrogen peroxide, Frost gets the math right — and warns you before the two ever meet.

Features
• Dual-path sanitizer math: chlorine (Dichlor 56%, Cal-hypo 68%, liquid 12.5%) or hydrogen peroxide (3% household, 35% food-grade)
• Drain-required safety interlock when switching sanitizers — chlorine and peroxide chemically neutralize each other
• Handling advisory for 35% food-grade peroxide (gloves, eye protection)
• Tub-type-aware water-change cadence — chillers vs DIY chest-freezer builds get different intervals
• Symptom-first cloudy-water diagnostic — "Water looking off?" is the hero card, not a buried sub-screen
• After-session top-up doses based on people × sessions
• Filter rinse, deep-clean, and replace cadence tracking
• Cold-water test-strip context — strips read slowly below 50°F
• Locale-aware metric/imperial units (liters or gallons), comma-decimal input supported
• Universal app for iPhone and iPad

For cold plungers running 80–120 gal / 300–450 L home setups — chiller-based, DIY chest-freezer, or somewhere in between.

$3.99 one-time. No subscription, no ads, no account, no cloud.

Privacy: Frost collects nothing. No analytics, no accounts, no network requests. Your settings live on your device.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Frost Pro (lifetime) | $4.99 | one-time |



## Version history (last 3 releases)

### 1.2 — 2026-06-25

You can now unlock Frost Pro at any time from Settings, without waiting for the trial to end. Plus small reliability improvements.

### 1.1 — 2026-06-12

v1.1 — Now free to try, plus localization and safety.

• Frost is now free to download — use every feature free for 48 hours, then unlock forever with one simple purchase (no subscription, no ads)
• Now available in German, Spanish, French, Italian, Japanese, and Dutch
• Handling-safety advisory on every 35% food-grade peroxide dose recommendation
• Fixed numeric input on systems with comma decimal separators
• Locale-aware decimal display (7,4 vs 7.4) on European systems

### 1.0 — 2026-06-10

No release notes.

## More apps by Roman Kopaliani

- [Soak: Hot Tub & Spa Calc](https://appshunter.io/ios/app/soak-hot-tub-and-spa-calc/id6775030424)
- [Reef: Aquarium Chemistry](https://appshunter.io/ios/app/reef-aquarium-chemistry/id6776750986)
- [Pond: Koi Chemistry](https://appshunter.io/ios/app/pond-koi-chemistry/id6777459595)
- [Saline: Saltwater Pool Calc](https://appshunter.io/ios/app/saline-saltwater-pool-calc/id6777715538)
- [Strip: USDA Jerky Safety](https://appshunter.io/ios/app/strip-usda-jerky-safety/id6777718532)

All apps by Roman Kopaliani: https://appshunter.io/developer/1635315269

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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 2026-07-17.*