I purchased this tester for reading my PH levels for my 40 Gal and 75 Gal fish tank. It works good for reading PH levels but as far as Bluetooth connectivity it’s trash. You can go to settings on your phone to select it and it will connect that way until you go back to the app to see if it’s connected.It does not connect to the app period so you are better off purchasing the model that’s no Bluetooth

Not certain what the other poor reviews are talking about. The app is unremarkable, but the BT connects properly and records the data as indicated. The application functions are extremely minimalist to be sure but the app is designed to read and record data whilst the probe is inserted in the ground. It records date, time, temperature, and pH. It is a bit annoying that the “save reading” button doesn’t actually save the data, you have to press the “disk” icon in the top right corner to actually save the data point. The instructions that come with the probe are not exactly well written (which instructions are these days?), but one can probably figure it out without too much effort.The device itself seems very fragile so users need to be careful handling the probe end especially when inserting it into soil with the metal protection “spear head”. And like the instructions indicate “NEVER unscrew the metal tip BEFORE removing any packed in soil or you will break the glass tip.

I’ve seen one other favorable review in here, which was quite thorough, & I follow along with that review. I use an iPhone 12 Pro Max, I have no Bluetooth connectivity issues, as some others are describing, perhaps that has something to do with the model of the testing unit vs the app (i’m using the YY–1030 tester), not sure? On the iPhone 12 PM, I’m running iOS 17.2, but I’ve used the latest version of this app from today, as well as recent versions across the last year approx, without any problems on the same model phone & previous iOS’s in that timeframe.I collect fountain pens, & I have a number of vintage fountain pens made out of celluloid, and and you need to be aware of the pH levels of inks, so I use this meter to test pH levels of fountain pen ink. It really works fantastic for this purpose. The other reviewer did mention about having to click the disk icon to save, that’s fine I’ve gotten used to it, I agree it’s a bare bones app. Otherwise… I’m grateful it can share out a data file, I wish it had a function to synchronize data between versions of the app installed on multiple iOS devices, for when you might use it with more than one copy of the app, ideally to take advantage of iCloud syncing, but it would be nice to open the app on my iPad, as well as my iPhone, and have all of the readings there synchronized… At present, there is no way to manage merging data between two installations of the app. ***As a feature request, it would be nice to see some type of data syncing functionality / choice, if the user wanted it, especially since an iOS app can ask permission to sync by saving a file on the iCloud Drive of the user.I see the developers release notes are always in Chinese, so I’m not sure if the developer actually reads the English reviews or if they get translated back to the developer automatically, but that would be my ONE wish list item, I’m otherwise very content with this highly functional bare bones tool!

This App works on both iOS 18.3.2 and MacOS 15.3.2 but pH meter data is often lost. For example, on an iPhone 15 the data will stop collecting if the phone goes to sleep or another app is used. For this reason I tried it on a MacAir (M3, 2024) so that I could maintain the Bluetooth connection. Unfortunately, data collected on the MacAir cannot be shared so you can only see the data on the screen. By contrast, data collected on the iPhone can be shared. I’m using it with a YIYEGO Ph Meter for Food (YY-1030).