A free program for Android, by Notion.

The Notion app is a smart home solution that allows you to monitor and control your home from anywhere. Notion lets you manage your security, climate control, and indoor and outdoor lighting through an easy-to-use, all-in-one app.

Notion is a safe and secure home security system that lets you receive notification alerts for any activity that might be a threat to your home or property. 

You can get alerts from a variety of devices. For example, you can get alerts from smoke and CO alarms, as well as temperature and humidity changes.

Notion lets you customize your notifications. You can opt to receive notifications for a specific event or activity, such as a door or window opening, or a water leak. You can set a time or day to receive notifications.

You can share access to your Notion account with your family, friends, or anyone you trust.