Frost: Cold Plunge Care

Chlorine & Peroxide Dosing

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Cold plunge water chemistry. Chlorine or peroxide paths, tub-type-aware cadence, cloudy-water diagnostic. Drain warning before a sanitizer switch. Pay once. 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.

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

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

Version 1.1

The developer, Roman Kopaliani, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • Roman Kopaliani
    Size
    • 1.5 MB
    Category
    • Health & Fitness
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    English and 6 more
    • English, Dutch, French, German, Italian, Japanese, Spanish
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    • © 2026 Roman Kopaliani
  • Privacy Policy

    • More by Roman Kopaliani