Kalay is a free multimedia photography app developed by ThroughTek Co. Ltd. for Android devices. It allows users to view real-time images of smart home devices, supports voice intercom, screenshot, and local video preservation. Users can also record images and upload them to the cloud and SD card, and review their video records at any time through the video playback feature. The app also allows users to share their devices with multiple users for viewing at any time, making it a great app for families or roommates.

One of the most useful features of Kalay is the timely mobile alert notification, which allows users to avoid missing important information. However, if users encounter any problems, they can view the common problems section in the app or leave a message on the official account/website. Additionally, if users have any questions or suggestions, they can provide detailed information through the feedback section in the app.

Overall, Kalay is a great app for those who want to keep an eye on their home and enjoy multimedia photography features. It is easy to use and navigate, and the privacy policy and user agreement are available for users' peace of mind.