Pool Chem – Calculator & Log

Water testing, dosing & CSI

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

Test your water, type the numbers, get exact doses. Pool Chem tells you precisely how much of each chemical to add — and keeps your whole test history on your device. EXACT DOSING • Free chlorine: liquid chlorine (any strength), cal-hypo, dichlor, trichlor — with CYA/CH side-effect warnings • pH: muriatic or dry acid amounts computed with real carbonate-buffer chemistry (not a rough chart) • Alkalinity, calcium hardness, stabilizer and salt doses in oz / lb / gallons • CSI (saturation index) so plaster doesn't etch and heaters don't scale • FC targets that follow your stabilizer (CYA) level • Chlorine, saltwater (SWG) and bromine pools YOUR LOG, YOUR DEVICE • Unlimited test logging — free, forever • Partial tests welcome: log only what you measured • Data stays on your device. No account. No cloud. • Export everything to CSV anytime ONE-TIME PURCHASE The free version is a complete calculator with unlimited logging for one pool. Pool Chem Pro is a single one-time purchase that adds unlimited pools, trend charts, CSV export and custom targets. No subscription. No ads. No feature removals. Ever. Always follow chemical product labels. Add, circulate, retest.

Ratings & Reviews

  • 5.0
    out of 5
    2 Ratings

Stability and reliability improvements.

Version 1.2.1

The developer, Gun woo Kim, 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
    • Gun woo Kim
    Size
    • 35.9 MB
    Category
    • Lifestyle
    Compatibility
    Requires iOS 13.0 or later.
    • iPhone
      Requires iOS 13.0 or later.
    • iPad
      Requires iPadOS 13.0 or later.
    • iPod touch
      Requires iOS 13.0 or later.
    • Mac
      Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    • English
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    • © 2026 WittyApps
  • Privacy Policy

    • More by Gun woo Kim

    You Might Also Like