COS Pro is a mobile surveillance app that allows remote monitoring, video playback, and push notifications. The app requires users to sign in to their account through COS WEB and use it on the app. The main functions of the app are adding devices and performing O&M of the devices. COS Pro supports iOS 9.0 or later systems and can be used with 3G/4G/Wi-Fi.

With COS Pro, users can remotely monitor their devices from anywhere, as long as they have an internet connection. The app is user-friendly and easy to navigate, making it easy for users to add devices and manage them. The app also provides push notifications, which can alert users to any unusual activity detected by their devices.

Overall, COS Pro is a useful mobile surveillance app for those who want to keep an eye on their devices remotely. The app is easy to use and provides helpful features such as video playback and push notifications. However, it is important to note that the app requires a COS WEB account to use, which may not be suitable for some users.