Wi-Fi Webcam is a free Android app developed by CocoGame under the category of Utilities & Tools. It allows users to use their phone's camera as a wireless webcam for other phones without using the internet. All devices must install the app to use this feature. The range of the app is limited to the Wi-Fi range from the cellphone in the center of the building server to others receiving Wi-Fi.

One of the app's main features is the ability to watch the screen of another phone's camera. The app provides a simple and easy-to-use interface for this purpose. However, the app has a restriction that when the user of the building server chooses to quit, all users joining will be forced to close the server. This can be inconvenient for users who want to use the app for a longer period.

Overall, Wi-Fi Webcam is a useful app that can turn your phone into a wireless camera. It is a great option for users who want to use their phone's camera as a webcam without using the internet. The app's simple interface makes it easy to use, but the restriction on the server can be a downside for some users.