# TubTest: Hot Tub Water Test — Step-by-Step Water Testing > Step-by-step hot tub water testing and chemical dosing guidance. (iPhone/iPad app by Steven Heller.) - Source: https://appshunter.io/ios/app/tubtest-hot-tub-water-test/id6749869752 (this page in markdown: same URL + `.md`) - Developer: [Steven Heller](https://appshunter.io/developer/1832558771) - Category: Lifestyle, Utilities - Price: Free - Rating: 4.94/5 from 32 App Store ratings · 9 written reviews indexed - Age rating: 4+ - Requires: iOS 15.1 · 34 MB - Languages: English - Released: 2025-11-06 - Data updated: 2026-09-02 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/tubtest-hot-tub-water-test/id6749869752/reviews.md ## What is TubTest? 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. ## Key features - Step-by-step test guidance - Smart chemical dosing calculations - Water history tracking - Spa-specific chemistry optimization - Local data storage for privacy ## Recent user reviews (9 of 9) All indexed reviews: https://appshunter.io/ios/app/tubtest-hot-tub-water-test/id6749869752/reviews.md ### 5/5 — A must for tub owners *2026-03-04* Super app to help manage chemistry. My favorite part is it tells you how much of what to add, to get to desired chemistry, based on your tub spec’s. ### 5/5 — Clean Hot Tub, Helpful App *2026-02-20* Love using TubTest ! I have a few Tubs I’m testing regularly and this always makes it super easy and useful. Great app thank you! ### 5/5 — This app is perfect. *2026-01-17* It completely removes the guesswork from water testing and replaces it with clarity and confidence. The guidance is accurate, the setup is thoughtful, and updates come quickly when feedback is shared. Highly recommended. ### 5/5 — The perfect hot tub companion *2025-12-06* This app has made hot tub maintenance bearable. No more guessing with test strips, just step-by-step instructions for testing and treatments. Simple, clean, and straightforward. And perfectly dialed into the Taylor test kits. ### 5/5 — Great app for testing spa *2025-12-01* As a new spa owner this app has helped tremendously. It walks you right through the testing process. I hope they soon add the FAS-DPD test for chlorine, as my Taylor 2006 test kit doesn’t come with the reagents for the apps chlorine test. **Developer response:** Thanks for the support! I'd love it if you could send an email to tubtestapp@gmail.com and let's see if we can help you out or get some support built into the app for what you're needing. ### 5/5 — A must-have for new hot tub owners! *2025-11-25* Our hot tub came with a generous chemical supply and test strips, which saw us through the first months of use. It is key to the longevity of the tub to get the water chemistry correct, though, so we sprang for a legitimate test kit and have been using it in concert with this app. It’s a newish app, but the developer has been extremely responsive, making frequent updates in response to user feedback. The app’s directions are FAR superior to those that came with the tub, on the chemicals, OR in the documentation for the test kit (the last is the runner-up). Our water is now “dialed in,” as the people in hot tub forums say. Do not pass go—this is the only water maintenance app you need! **Developer response:** Thank you so much for the support! Feedback from all the users has been invaluable in shaping the direction of the app and I look forward to building in even more helpful features. ### 5/5 — Test Tub rocks! *2025-11-15* I love this new hot tub app! Total game changer! ### 5/5 — Impressive! *2025-11-15* I never thought I needed an app for our hot tub but test tub is a game changer! Makes it so easy. **Developer response:** Haha, I know right?! I felt like a counterfeit Mr. Wizard the first time I tried to use a dedicated test kit. My entire goal was to make the otherwise complicated testing process fool-proof and I think we're getting there. Thanks for supporting TubTest! ### 5/5 — Best hot tub app *2025-11-06* My hot tub is perfectly balanced now ## Frequently asked questions about TubTest ### How does TubTest help with water testing? TubTest provides explicit, step-by-step instructions for testing your hot tub water. It clarifies which reagents to use, how many drops are needed, and how to interpret color changes, eliminating guesswork. ### What chemical dosing information does TubTest offer? After each test, TubTest calculates precise chemical dosing recommendations. It supports key parameters like pH, chlorine, bromine, alkalinity, and calcium hardness, and tailors these to your specific hot tub size. ### Can I track my hot tub's water history with TubTest? Yes, TubTest allows you to track your complete test history in a calendar view and your full treatment history, including chemicals added and when. This helps you spot trends over time and remember past maintenance. ### Is TubTest compatible with different test kits? TubTest is designed to work with Taylor test kits and also offers a quick test strip entry option. It focuses on spa-specific chemistry needs, supporting both bromine and chlorine sanitizers. ### How does TubTest handle user privacy? TubTest prioritizes privacy by storing all data locally on your device. It does not require accounts, use cloud storage, or collect any user data, ensuring your information remains private. ### What is the update frequency for TubTest? TubTest was last updated on March 18, 2026, indicating active development. While specific update frequency isn't detailed, the recent update suggests ongoing support and improvements. ### What devices does TubTest support? TubTest is available for iPhone and iPod devices, making it accessible to a wide range of Apple users who own hot tubs. ### Is TubTest suitable for beginners? TubTest is ideal for beginners as it provides clear, expert-level guidance through the entire testing process. It simplifies complex water chemistry, making hot tub ownership more manageable for new users. ## Version history (last 5 releases) ### 1.7.5 — 2026-06-05 Better salt water support is here! • New "Salt Water" sanitizer option — choose it during setup or in Settings • Calcium hardness targets now adjust automatically for salt systems (lower range to protect your salt cell) • Test and track your salt level, with exact dosing recommendations Plus reliability improvements: • More reliable sync across your devices • Retest reminders now stay on screen until you're ready to test • Fixed stabilizer (cyanuric acid) dosing when using custom ranges • Stale results now clear correctly so you always see current readings Thanks for the great feedback — a salt water user asked for this one. Keep it coming! ### 1.7.4 — 2026-03-18 What's new in 1.7.4: Big fixes for quick entry mode ### 1.7.3 — 2026-03-03 Version 1.7.3 — Bug Fixes -Units display bug fixed If you've set your preferred units to Metric, treatment doses now properly display in grams and milliliters instead of defaulting to tablespoons and cups. -Muriatic Acid Setting Saved Selecting Muriatic Acid 31% or 14.5% as your pH decreaser now persists between sessions — no more reverting back to Dry Acid. ### 1.7.2 — 2026-02-25 What's New in 1.7.2 - Maintenance Essentials — The Resupply tab now includes must-have maintenance products like filter cleaner, pre-filters, plumbing flush, and scum absorbers to keep your tub running smoothly. - Smarter Kit Recommendations — Test kits on the Resupply page now show helpful labels like "Bromine," "Chlorine," "Salt," or "Budget-Friendly" so you can quickly find the right kit for your setup. - Expanded Reagent Support — Added R-0600 OTO Indicator reagent for K-1000 kit users. Thanks for using TubTest! If you're finding the app helpful, a quick rating goes a long way. ### 1.7.1 — 2026-02-23 What's new in 1.7.1: - Bug fixes ## Apps similar to TubTest | App | Rating | Price | Category | | --- | --- | --- | --- | | [Crystal Water Monitor](https://appshunter.io/ios/app/crystal-water-monitor/id1616195969) | 3.8 (5) | Free | Lifestyle | | [Pool Math Calculator](https://appshunter.io/ios/app/pool-math-calculator/id6746519942) | 4.8 (43) | Free | Lifestyle | | [Pool-Calculator](https://appshunter.io/ios/app/pool-calculator/id412876581) | 4.2 (629) | $4.99 | Lifestyle | | [iCare - Ideal Water Care](https://appshunter.io/ios/app/icare-ideal-water-care/id1562048485) | 4.4 (134) | Free | Lifestyle | | [HTReminder](https://appshunter.io/ios/app/htreminder/id6755663309) | 3.6 (5) | Free | Lifestyle | | [FROG Water Care](https://appshunter.io/ios/app/frog-water-care/id1417747779) | 4.5 (4,792) | Free | Lifestyle | ## Related topics [hot tub maintenance](https://appshunter.io/ios/topics/hot-tub-maintenance) · [saluspa hot tub](https://appshunter.io/ios/topics/saluspa-hot-tub) --- *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 2026-09-02.*