Johnson Controls invented the room thermostat 135+ years ago. With your family's health and energy savings in mind, we reinvented it with the remotely controlled GLAS.

The GLAS app creates a seamless experience between your thermostat and mobile device. Ensure the comfort of your spaces from anywhere by changing your temperature preferences, adjusting your schedule, setting your modes, and viewing the current air quality.

Control all of the most important features with the GLAS app:

- Follow a guided walk-through for easy installation
- Access and control your GLAS device from anywhere
- Adjust heating and cooling modes and temperatures
- Use voice control to manage your thermostat from your mobile device
- Create indoor comfort regardless of outdoor weather and air quality
- View your indoor and outdoor air quality with details
- Schedule events or vacations and edit existing schedules
- Auto-adapt your home’s heating and cooling based on the actual timing of your daily routines
- See energy usage and savings for the last seven days
- Receive notifications for poor air quality and HVAC maintenance reminders
- Manage and control more than one GLAS thermostat and multiple locations

What’s New

Version 1.2.76

Added feature to receive the Ohm Connect events for energy savings

Bug fixes

Ratings and Reviews

2.4 out of 5
116 Ratings

116 Ratings

BenTheSkiguy ,

Behind the times

Coming from another smart thermostat this app is definitely behind the times. You get three comfort “temperature settings” and that’s it; Home, Away, and Sleep and they can’t repeat within the day. For example I used to have my sleep start at 9 pm and then start again at 2am in case someone had messed with the thermostat. I can’t do this with GLAS. I had a Wake temp setting which was warmer than Home for Winter use to get everyone out of bed. That’s gone. I also used to have a Weekend temp setting which was a few degrees warmer than my Home setting. I also can’t do that now. The app works but it’s a bit slower and clunkier than its competitors.

In the end this is a pretty piece of hardware lacking quality software and I’ll probably end up returning it.

AndersLnd ,

Great hardware plagued by slow, bug riddled app

It pains me to write this review, because I love the actual GLAS hardware. The thermostat itself with its transparent OLED panel just looks sleek, and it’s UI is pretty good when you’re using the thermostat directly.

What I do have a major problem with however, is the absolutely awful app. I’ve tried to edit the wake times for various days of the week over a dozen times now, and each time I change it and hit save, the wake time immediately reverts back to what it was previously. The only way to make a schedule change stick is to manually input it into the thermostat itself. If I was interested in that, I would have bought a $30 dumb thermostat from the hardware store. This is a smart thermostat though, and a very expensive one at that. I have smart light switches that cost a fraction of what this does whose app works flawlessly. And I haven’t even mentioned the myriad of other problems, such as frequent crashes and wait times of as much as 20-30 seconds after opening the app to actually use it.

Come on JCI. This thermostat has a lot of potential. Your physical hardware is great. Just fix this god awful app and you’ll have something truly special on your hands. For the moment though, until that happens, I would recommend neither the app nor the thermostat.

Bmah13 ,

Connect time and connection issues

The app takes an extraordinary amount of time to come up. I've had other thermostats that connected faster but this is not a deal breaker but why does it take longer than thirty to forty seconds and at times almost a full minute to connect. Also lately I've noticed that when the app connects it not showing what is actually happening on the Glas wall unit. Meaning, the wall unto and AC/Heater is working but the app says the entire stst is off and it's not reflecting the true indoor temperature. I've logged off the app, rebooted the phone and even deleted the app and it's still wrong. Hopefully this gets fixed.😳

App Privacy

The developer, Johnson Controls, Inc., has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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