Sutro

Sutro

Love your Pool (or Spa) again.

175 ratings
107 reviews
Free

Details

  • Released
  • Updated
  • February 6, 2020
  • November 5, 2025
Sutro screenshot #1 for iPhone
Sutro screenshot #2 for iPhone
Sutro screenshot #3 for iPhone
Sutro screenshot #4 for iPhone
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About

Effortlessly manage your pool or spa water quality. This app works with a smart monitor to automatically track pH, free chlorine, alkalinity, and temperature, providing insights that make sense for optimal water conditions.

Automatic water quality monitoring
pH tracking
Free chlorine measurement
Alkalinity tracking
Temperature monitoring
Seamless app integration
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What users say

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What's New in Sutro

1.91

November 5, 2025

What’s New: Removed support for device integrations. Updated address support — now limited to Canada only.

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User reviews

Love My Sutro Devices

I purchased a Sutro for the pool in May 23’ and couldn’t be more grateful that I did. There was some difficulty getting it up and running but I’ve since purchased a second one for the spa in August of 24’ and that was up and running in 15 minutes—hardware upgrades and user familiarity making the difference.

The countless trips and hours to the pool store for water testing are over as Sutro helps keep my water crystal clear with three reading a day. Love being able to check the app anytime to see what’s happening.

To me, the $29 monthly cartridge and monitoring fee in addition to the $350 device cost, are well worth the saved trips to my local pool store.

Sutro Customer Service (shoutout Dave!) has been great—always providing step by step instructions that solved any questions that I had.
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Returning customer

Has Sutro in my old pool, moved and built a new pool. Lost the hub but just got a new one and back with it. Customer support was great and understanding. Got my new hub and a brand new set of batteries.

Amazing Customer Service

I’ve be using Sutro now for 2 years and love it. If I have ever had any issues they have been super helpful fixing it. I wish all customer services were as good as Sutro. The app is very easy to use and has made my pool experience simple.

Awesome!

Great app! They are constantly improving and adding new features! Makes it easy to manage my pool hassle free.

Great app and robot

Love my Sutro so far and the app works perfect with it.
So much less stress by the hot tub!!

Developer apps

User experience

🐞

Reported Bugs

4 issues

App crashes and freezes

Bug

Disconnection issues with hub

Bug

Calibration failures

Bug

Inaccurate water chemistry readings

Bug

Requested Features

4 requests

Measure total hardness and CYA

Feature

Customizable notification settings

Feature

Ability to cancel subscription easily

Feature

Improved app stability and user experience

Feature

FAQ

What does the Sutro app do?

The Sutro app works with the Sutro Smart Monitor to automatically measure and track key water parameters for your pool or spa. It monitors pH, free chlorine (ppm), alkalinity, and temperature, providing you with easy-to-understand data to manage your water quality.

What are the key features of Sutro?

Key features include automatic monitoring of pH, free chlorine, alkalinity, and temperature. The app provides measurements that make sense and seamless integration with the Sutro Smart Monitor for effortless management of your pool or spa water.

Is Sutro free to use?

Based on the provided information, the Sutro app is free to use. There are no mentions of subscription fees or in-app purchases for the core functionality of the app.

What devices is Sutro compatible with?

The Sutro app is designed to work with the Sutro Smart Monitor. While specific device compatibility for the app itself (e.g., iOS or Android versions) is not detailed, it requires the companion hardware to function.

How does Sutro help manage my pool or spa?

Sutro simplifies pool and spa management by automating water quality testing. By providing real-time data on pH, chlorine, alkalinity, and temperature, it helps you understand your water's condition and take necessary actions to keep it clean and safe.