CarePenguin app and hot water sensor
Wifi Enabled

CarePenguin In-home Activity Sensor

The CarePenguin In-home Activity Sensor and app allows you to remotely monitor the well-being of your elderly loved one. The sensor detects spikes in temperature on the hot water pipe in a home, indicating that someone is being active by using water. You can check the app at anytime to see your loved one’s activity and set “activity zones” to alert you if there’s a lack of activity.

Please read before purchasing
  • Currently only available on iOS. Android version coming soon!
  • Not compatible with water heaters with recirculation pumps
  • The caregiver must be the one to sign up and purchase below.
$40 sensor + $8.99/month
$40 sensor + $98/year

30 day money-back guarantee

If for any reason CarePenguin doesn’t work for you, we’ll give you a full refund within 30 days.

Cancel anytime

Contact us at help@carepenguin.com at anytime to cancel your subscription or manage your account and billing here.

30 day free trial

The first month is on us!

Product Dimensions

4.5″ tall
1.5″ wide

CarePenguin App

Additional Product Details

System Requirements
WiFi Router
iOS 14 or later
Access to water heater
Electrical outlet near water heater
Package Includes

CarePenguin temperature sensor
Micro USB cord
Power brick
Zip ties
Installation guide


- Access to your loved one’s water heater
- Your loved one must have WiFi at their house
- An iPhone to download our app from the app store, and install the sensor (we will have an Android app available soon!)
- Someone to do the simple installation via an iPhone on site. See more on having another family member or helper do the installation.

Senior citizens use hot water more than you think! We’ve tested our sensors in senior citizens’ houses and found that the average senior citizen uses water about six to ten times a day, making it an excellent proxy for human behavior. CarePenguin can sense anything from rinsing a dish, brushing teeth, washing hands, doing dishes, doing laundry, taking a shower, etc. This is because hot water and cold water are usually mixed at the faucet. It’s rare that people just use cold water. When a faucet is turned on, some warm/hot water is moving through and even the smallest amount causes CarePenguin to detect an event of water use. Contact us if you have any questions!

The CarePenguin sensor simply takes the temperature of the hot water pipe output on a water heater. Whenever someone uses water in the house, the temperature of that pipe spikes up, indicating that someone in the house is up and active. The CarePenguin app displays this data, showing your loved one’s activity throughout the day. You can check anytime to see the last time your loved one was active and receive alerts if we detect a lack of activity, encouraging you to check in and make sure everything is okay.

Absolutely! CarePenguin is simple to install. All you need to do is zip-tie our sensor to the hot water pipe output on a water heater, plug it into a nearby outlet, set up your account on our app, and connect it to WiFi using our step-by-step instructions. If you can set up a Nest product or Amazon Alexa, you can set up CarePenguin.

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