The jailbreaking is only needed for the installation of Guardian. It isn't needed for Guardian to be able work. Once Guardian is installed, all signs that the phone was ever jailbroken will be completely hidden. The jailbreaking process really isn't rocket science. There are many apps available online that can jailbreak your phone with one click, and many more that offer safe jailbreaking services and step by step guides.
Pangu is a chinese group that has been at the forefront of recent jailbreaking developments. Their apps are easy to use and safe. See their website for helpful tutorials and answers to frequently asked questions.
- iOS 7.1 - 7.1.x
- iOS 8.0 - 8.1
- iOS 9.0 - 9.1
- iOS 9.2 - 9.3.3
Taig is another well respected group that produces jailbreaking solutions. Like Pangu, their apps are easy to use and safe. Take a look at their website for helpful tutorials and answers to frequently asked questions.
- iOS 9.0 - 9.3.5
- iOS 8.4
The Evasion solutions are for older model iPhones and iPads. They haven't produced jailbreaks for later versions of iOS but their solutions for iOS 7 and earlier are easy to use and safe.
- iOS 7 and earlier