TubTest: Hot Tub Water Test

Step-by-Step Water Testing

Only for iPhone

Free · Designed for iPhone

iPhone

Finally—an app that actually SHOWS you how to test your water, step by step. No more guessing which reagent, how many drops, or what color means what. TubTest walks you through the testing process like having an expert at your side. STEP-BY-STEP TEST GUIDANCE • Follow along with Taylor test kits or use quick test strip entry • Know exactly which reagent to use and when • See what colors indicate—no more second-guessing • Proper testing sequence enforcement: alkalinity first, then pH, then sanitizer SMART DOSING CALCULATIONS • Get precise chemical dosing after each test • Supports pH, chlorine, bromine, alkalinity, calcium hardness • Recommendations tailored to YOUR hot tub size • Professional treatment cards you can save and share TRACK YOUR WATER HISTORY • Complete test history with calendar view • Full treatment history showing chemicals added and when • Spot trends over time • Never wonder "when did I last test?" BUILT FOR HOT TUB OWNERS • Optimized for spa-specific chemistry needs • Bromine and chlorine sanitizer support • Saturation Index monitoring • Works with the test kits you already own PRIVACY FIRST TubTest stores all data locally on your device. No accounts, no cloud storage, no data collection. Whether you're new to hot tub ownership or a seasoned pro, TubTest makes water chemistry simple. No subscriptions, no upsells—just clear guidance when you need it. Download free and start testing smarter today.

  • 5.0
    out of 5
    11 Ratings

What's New in 1.6.0 • Metric Measurements - Tap any treatment amount to cycle through oz, tablespoons, and grams • Improved Bromine Guidance - Clearer instructions for when to add sodium bromide vs. shock, with helpful banners explaining each treatment path • Fixed Total Chlorine Instructions - Now correctly says "match color immediately" per Taylor directions

The developer, Steven Heller, 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

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

    • Seller
      • Steven Heller
    • Size
      • 36.2 MB
    • Category
      • Lifestyle
    • Compatibility
      Requires iOS 15.1 or later.
      • iPhone
        Requires iOS 15.1 or later.
      • iPod touch
        Requires iOS 15.1 or later.
      • Mac
        Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
      • Apple Vision
        Requires visionOS 1.0 or later.
    • Languages
      • English
    • Age Rating
      4+
    • Copyright
      • © 2025 Lucky Labs