Content rating
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image

About this app

Come home to Cosy with the help of our super smart heating controller. Cosy is a portable, wireless thermostat that simplifies heating control using an app. Thanks to the Cosy App, you and your family can control your heating and hot water from anywhere - using your smartphone, tablet or PC.

Please note: you’ll need to update to the newest version of this app to unlock some of our latest (and greatest!) future features – like temperature graphs – more info below.

Customised heat settings

Take your pick of our four heating modes, then sit back, relax and let Cosy do the rest. Choose from:
• Slumber - the temperature you'd like your home to be when you're asleep or away from home.
• Comfy - the temperature you'd like it to be when you're at home
• Cosy - the warmest temperature setting for when you need a good ol’ heat boost.
• Hibernate - keeps your heating off but protects your pipes against frost. Hey presto - no burst pipes!

Extra Cosy features: hot water and twin zone

Cosy can control your hot water as well as multiple heating zones. All heating events - home and water - can be controlled, scheduled and boosted from the app or the Cosy Display. Easy peasy!

Psst! You’ll need to have your Cosy wired up for twin zone heating and hot water. Get in touch with our support team for more help.

Temperature graphs

You’ll soon be able to see your heating data in even more detail. View your home temperature readings and mode change info for the past 30 days. Coming soon to a Cosy App near you…

Making comfort affordable

Stuck in a meeting (groan)? Invited out at the last minute (hooray)? If so, don't waste good heating time when you're not there. Use the app to turn your heating down to help you save on your energy bills.

Welcome Home to Cosy feature

By connecting a Smart Plug to your Cosy you can schedule your lights, your radio, or even your slow cooker to come on when your heating does. Don't just come home to the warm, come home to Cosy.

Schedules to suit your lifestyle

Simple to set up, you can create up to seven unique heating profiles for Cosy. So if you regularly do something different every day of the week, Cosy will know exactly what to do.

Cosy for all fuels and family members

Now the whole family can download the Cosy App. When someone changes an event it appears in the Activity feed, so you can keep an eye on energy hogs (aka Grandma Jean). Cosy works with gas, oil, LPG and biomass.

Who are we?

Cosy is the result of a lot of brainpower from the team here at geo (Green Energy Options). We're an innovative tech company, based near Cambridge. We’ve been working on energy data since 2006 and have already helped many homeowners across the UK turn their houses into Cosy homes. Now, it’s your turn to start coming home to Cosy too!


With thanks to the following libraries and licences used in the making of our Cosy App:

Apache License v2.0 - http://www.apache.org/licenses/LICENSE-2.0:
+ Android SVG
+ UserVoiceSDK
+ Android-async-http (Android-friendly Apache License, Version 2.0)
+ Apache commons-codec-1.8
+ eventbus-2.2.1
+ MPAndroidChart
+ Gradle
+ AndroidDeviceNames

Proguard - http://proguard.sourceforge.net/license.html:
+ Proguard (GNU GPL with special exception for use with Gradle/Google Android SDK)

Eclipse Public License 1.0 - http://www.eclipse.org/legal/epl-v10.html:
+ Junit
+ JaCoCo

The MIT License - https://opensource.org/licenses/MIT:
+ Roboelectric

+ fabric: https://fabric.io/privacy
Updated on
Jun 23, 2022

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Personal info, App activity and 2 others
Data is encrypted in transit
You can request that data be deleted

What's new

In version 3.7.1 of the Cosy app there have been a number of bug fixes and performance improvements