ICO pH Sensor (Blue) + Calibration and Regeneration Kit

It’s really good. A bit pricey, but it makes taking care of the pool easy. Just follow what it says.

Very good product. I wish it worked with Google, but it’s still super useful and made in the USA. Thanks!

Great sensor. Customer service is quick to help. It works with salt and shows how much salt is in the water. I like that the battery is rechargeable.

I had some trouble after an update, but they fixed it in one day. Now it’s back to 5 stars from me. Thank you!

Good app. I wish there was a widget so I could see info without opening it.

Awesome. I barely ever check the water now. The app is easy and shows how things change. It can be a bit pricey, but I still recommend it.

My pool water has been fine since I got this. No more test strips. I recommend it.

A must-have for pool owners. I use fewer chemicals now. It tests the water every hour. I’m very happy with it.

Helps me do regular water tests. It tells me how much product to use.

Very easy to use and helps me add just the right amount of chemicals. I never get cloudy water now.

A great tool that keeps my pool safe. The readings are spot on. I highly recommend it!

A great buddy for my pool. My water stays clear all summer. It saves me money on chlorine. I just wish I could export data to Excel.

I love this app and the ICO. It makes things so much easier for my pool. I did have a small glitch after winter, but I reinstalled it and it was fine.

I got the ICO today. It was quick to set up and matches my test strips. The app is easy to use. So far so good!

Great product. I wish there was a notebook feature so I could write down how I fill my spa and which chemicals I use.

Three seasons of clear water with no issues. It’s been worth the money because I buy fewer chemicals.

It’s so easy to figure out what my water needs. I don’t worry about pool chemicals anymore.

A really good device for spa water. I only wish it cost a bit less. Enjoy your swim!

I’m very happy with ICO after one year. It lets me check on my pool even when I’m away. I do recommend it.

Great app. The best of all the connected pool testers I’ve tried.

The app is awesome. The product helps me keep my pool water balanced. I’d love a “measure now” button, and maybe push alerts when levels get too high or low.

I like the new version of the app. I’ve used ICO for two seasons. It’s strong and helps keep my pool in good shape.

It’s perfect now. I did wish for more accurate temperature readings, and now I have it. Thank you!

The older version was good, and the new one is even nicer. Great job.

This French company did a great job. The newest version of the app is really nice!

Very well made. Setup was easy if you follow the guides. It checks the pool all the time and warns me right away.

Easy to use, and the readings are right. Support answers fast. I do wish it had widgets and a graph with everything on it.

A great device that sends alerts at the right time. I spend much less time keeping the water clean. Just remember to calibrate the sensor first.

Very good. Simple to set up. I’m excited to see how the readings go.

Really cool. Much better than dipping test strips every week.

Works great. Thanks to the makers of Ondilo.

The app gets updated often, and customer service is always there. I wish I could pick which alerts I want, like when it gets too cold.

Overall rating is 4.6 out of 5 stars from 779 reviews.

After 6 months, I’m getting strange results. I bought test strips on Amazon. I’ll try recalibrating.

I’ve had ICO for 4 years, and now the battery is dead. They offered me 50% off a new one, but it’s already expensive, and new probes cost too much. I’m not happy about it.

I used ICO since 2020, but now it’s broken. The pH sensor won’t calibrate. Customer service offered me 40% off a new one, but that’s still a lot of money.

It works well for water care, but the battery doesn’t last. It’s way too expensive for just a few months of use. They should fix the battery issue.

I keep having Wi-Fi problems. It used to work fine, but now I get errors. Might be an issue inside ICO.

An update won’t install, and the app has bugs since the latest Android version. Hoping for a fix soon. Otherwise, I like it.

I replaced parts when I first got it, and now, three seasons later, it’s broken again right after the warranty ended. 419 USD for just three summers is not good. Let’s see if support helps or not.

I’ve had ICO for 5 years and liked it, but after the last update, I can’t see any readings. Even reinstalling didn’t help. I hope they fix it soon.

I liked it before, but today the app won’t start at all. I tried everything. I hope it’s fixed soon. Also, the pH probe was tricky before, so I hope that doesn’t happen again.

It wouldn’t start at first, but they fixed it in a day. It’s better than Flipr, which was super unstable. Still, it was annoying at first.

After the 4.1.1.5 update, the app often won’t open. I’ve tried reinstalling, but no luck.

Great app, but it stopped working this morning. Even after uninstalling, it won’t open.

The app won’t launch after the latest update in May 2024. Please help!

It’s not very stable, but the support team is great. I wish I didn’t need them so often.

I’ve had it since 2019, but I always have issues each season. This year it died right after the warranty. The repair cost is high. I don’t think it’s reliable.

The app crashes a lot. I’m not happy I spent so much and still need test strips. I might just toss it.

I wish I could turn off some alerts. Also, I need graphs for more than one month. This is a big headache for me.

It stopped working today and I couldn’t open the app. Later it started working again, but that was really annoying.

My ICO often has problems connecting or reading the probe. They swap it quickly, but it’s still a hassle.

The product is good and the app is nice. I saved some money on chemicals. But I don’t like that I can’t turn off the maintenance tips—they keep popping up in my home system.

After 3 years, the board failed and Ondilo won’t cover it. They offered 40% off a new one. That’s still expensive. I’m disappointed.

It’s pretty complete, but there’s no TAC reading, and it keeps telling me to add too much pH minus at first. So I don’t always follow its advice.

It’s helpful if everything works. But I can’t export data, and the API doesn’t work. They haven’t replied for 2 months. Not good.

More network issues. I have to use test strips now. The app says ICO is connected but can’t reach the server. Not good.

Bought it 2 days ago, but it’s not showing any data. The chart is empty. Useless right now.

If your servers are down, tell us! I wasted hours trying to fix it myself. It also clogs up your support line.

I paid 400 USD and only had 2 good days. Now it won’t connect, and support isn’t helping. It’s an expensive piece of junk.

Helpful, but my redox sensor was off from the factory. I had to recalibrate after 2 weeks so it wouldn’t tell me to use too much chlorine.

Works well and makes maintenance easy, but I miss the hardness reading from older versions. Also, I’d like Google Assistant support.

It works well and is accurate. The battery lasts about 6 months. I recommend it.

I’m let down because the device isn’t found. Support only does chat, which is hard if you’re traveling. I’m looking elsewhere.