Product review (3 stars): Bluetooth-Enabled Software with Remote Sensor, Works for Up To Seven Devices
I live in New England, and as such, the relative humidity varies quite a lot. During the winter months when the heat is running non-stop, it gets very dry, so I am careful about keeping my Taylor acoustic and Gibson electrics safe from humidity deprivation. I have been using a Taylor humidity and temperature device for over a year, but the one thing that always annoyed me was that the Taylor option did not have Bluetooth connectivity. It wasn't "smart" - meaning connected to my devices. So, I was more than happy to test out this D'Addario system that was a "smart" device.

I was not able to connect my Humiditrak to my iPad, only to my iPhone. The same apps work on both iPhones and iPads, so it is not a difficult thing to enable the app for both iPad and iPhone from the software development end (I work in software). Please have the software engineers take care of this.

The app itself is great, I was able to connect the sensor to my iPhone in under a minute. I did not have an existing account, so I had to create one. Even as a brand-new user, the set up was fast. I did not receive a confirmation email message that my account had been created, however, even though I did enter my correct email address. This is another thing for the software engineers to look into (QA bug).

The sensor, as other reviewers noted, is most certainly off. There was a six percentage point difference between what the Humiditrak reported to me, and what my Taylor device reported. The Humiditrak reported that the humidity was less than the Taylor, even when I tested with a soaked sponge humidity addition. There is a calibration defect in the manufacturing process.

I am not a fan of the included metal clip. The clip will never touch a guitar of mine. It is asking for scratches. The Pandora's box with this clip is that if you insulate it, you run into creating problems with guitar finishes (it's a problem with guitar stands, too). There is no good answer to this problem. If you use metal, it's going to scratch. If you use a coating, it can hurt the guitar finish. This is probably why Taylor just went with the "stand me on a shelf near your instrument or in the instrument case" version.

The included Velcro squares are minimally viable to hold the device on to the clip. If you own a pedal board and you use velcro on your pedal board, then you know what heavy duty velcro feels like. This is not even remotely close to that level of grip. I did like the attention to detail, though, where D'Addario made sure there was a molded square area on the back of the sensor, so you didn't have to guess about where to put the velcro square. They made sure you would not stick it over the battery compartment.

In summary, my notes for D'Addario's Teams:
- Fix the manufacturing calibration problem
- Have the software team look into the email notification when a new account is created
- Have the software team enable the app for both iPhone and iPad use
- Either get rid of the clip or engineer a covering for the metal that won't harm guitar finishes
- Give the software team a pat on the back for a friendly user interface (GUI experience is terrific!)
- Include higher-stick velcro, guitar players know what good velcro is