Port Scanner is a free Android application developed by Catch 23 in the Utilities & Tools category. As the name suggests, it allows you to scan ports on a remote host via its IP or domain name and provides you with information on which ports are open on the host.

The application is packed with features like 3G support, protocol recognition, and many more. With its easy-to-use interface, you can scan any host in just a few clicks. If you face any difficulty while using the application, you can reach out to the developer for further assistance via email.

Overall, Port Scanner is a useful application for network administrators and anyone who wants to know more about the open ports on a remote host.