KidLogger is affordable, with emphasis on messenger chat monitoring. Standout feature is voice and video capture which is quite unique. Easy installation process.
Kaspersky Safe Kids is very affordable, has real time notification and location alerts. Great dash board for monitoring and comes with with 14 different categories for content filtering. Easy installation process.
Norton family premier from Symantec is easy to download and install. It comes with a setup wizard which makes the entire installation procedure simple. No specific limit on the number of devices.
Net Nanny is a parental control software that is compatible with a range of platforms including Android, Windows, iOS, and Kindle. Allows to block and monitor sites and apps.