Hoverwatch is a form of cellular phone tracking software that is designed to track the place, messages, and other items on a device. I do not need a way to access reading user reviews, however in general users tends to set up this sort of software to monitor the experience of these children or employees, or to track a missing or stolen device. 

A cellular phone tracker is a piece of software or hardware that is installed on a portable device or computer in order to track its location, in addition to other information such as calls and messages. This technology may be used to track the whereabouts of children, employees, as well as lost or stolen devices. Some tracking apps were created specifically for Android devices, which run on the Android operating system. These apps are generally used to monitor the place of a computer device in real-time and can also provide historical location data.

A number of the functionality it offers include:

Tracking the device's location in real-time, in addition to historical location data.
Recording and saving of incoming and outgoing calls and SMS/MMS messages.
Taking screenshots of the device's screen at specific intervals.
Keeping a log of all websites visited on the device.
Monitoring instant messaging apps such as WhatsApp, Facebook Messenger, Viber, and Skype.
Detecting and recording keystrokes on the device.

Some individuals report that the application is simple to use and provides accurate tracking information, while others may have problems with accuracy or encounter bugs.
It is worth to say that, some people see this sort of software to be an invasion of privacy and may have ethical concerns about using it to monitor someone without their knowledge or consent.

It is worth mentioning that, the exact group of features provided by Hoverwatch can vary greatly depending on the version you're using, the device and plan you've, and many of them may require root access, so it is advisable to check the state website or the terms of service to ensure the feature you will need is provided and it's legal to use.