The 5 Best Pool Chemical Calculator Apps

With just a few taps, you can get the pool and hot tub water test results on your smartphone or tablet. Here are our updated recommendations for the best pool and spa chemical calculator apps. Plus, apps to control your swimming pool or hot tub.

1. The Pool Care App

Price: 7-Day Free Trial (then only $49 per year)
Compatibility: iOS and Android

Full Disclosure: This is our app to help you test, treat, and track your pool.

The Pool Care App is one of the nicest-looking pool chemical calculators. It’s also incredibly user-friendly. This app is easy to use: enter your water test results and get the proper amount of chemicals you need to add to your swimming pool.

One of the best parts of the app is that it doesn’t try to sell you chemicals. In fact, it lets you choose which chemicals you want to add and does all the calculations for you.

This app was launched in late 2024, and we’re improving it and adding new features every month. If you have any questions, please feel free to email [email protected].

If you want to try the app, download it now!

2. Pooli

Price: FREE (limited features) or $109 a year.
Compatibility: iOS and Android

We think Pooli is a great pool chemical calculator and pool maintenance app. It looks great and is extremely user-friendly! It has a built-in test strip scanner (using your phone’s camera) that delivers instant water test results based on pool volume.

Get your chlorine, pH, total alkalinity, calcium hardness, and cyanuric acid (CYA or stabilizer) readings instantly. And it provides the most affordable solutions, chemicals, and equipment. Download the app here!

3. PoolMath by TroubleFreePool

Price: $7.99 Premium Subscription In-App Purchase
Compatibility: iOS and Android

A simple pool water chemistry tracking app made by the popular TroubleFreePool forum. Track all your pool water tests and it’ll tell you exactly how much of each chemical you need to add. It follows the TroubleFreePool method (BBB). Download the app now!

4. Clorox Pool App

Price: FREE
Compatibility: iOS and Android

Pool owners can use this free, easy-to-use app to scan test strips to provide expert water test analysis. You can also use the app to troubleshoot pool problems, get personalized recommendations, and shop for Clorox products. Download the app here!

5. Sutro Smart Water Monitor

Price: $499 for the unit + $29.99/month for the service
Compatibility: iOS and Android

Easily the sexiest pool maintenance product ever made! But that’s just the tip (and that’s what she said)! The device measures, monitors, and sends you chemical recommendations to your smartphone. It measures pH, chlorine, and alkalinity three times a day. Try Sutro today!

3 Ways We Can Help With Your Pool

1. The Pool Care Handbook: An illustrated guide to DIY pool care, including water chemistry, maintenance, troubleshooting, and more.
2. The Pool Care Video Course: You’ll get 30+ step-by-step videos and a downloadable guide with everything you need to know about pool maintenance.
3. The Pool Care App: Enter your water test results. Get a custom treatment plan. Know exactly what chemicals to add to keep your pool clear.