For android cell phones and tablets mostly spying apps work without rooting but some features like Facebook messenger and Whatsapp chat monitoring will only work on a rooted device.
Brief overview of rooting
Rooting is jailbreaking for Androids and allows users to dive deeper into a phone’s sub-system. Essentially, it’ll allow you to access the entire operating system and customize just about anything on your Android. With root access, you can also get around any restrictions that your manufacturer or carrier may have applied. You can run more apps, you can speed up or speed down your processor, and you can replace the firmware.
The process requires users to back up current software and flash (install) a new custom ROM (modified version of Android).
Rooting is normally performed using a PC, a USB Cable, and the Android device that you want to root.
Why should you not root?
Voiding your warranty: Some manufacturers or carriers will use rooting as an excuse to void your warranty. It’s worth keeping in mind that you can always unroot. If you need to send the device back for repair, simply flash the original backup ROM you made and no one will ever know that it was rooted.
Bricking your phone: Whenever you tamper too much, you run at least a small risk of bricking your device. The obvious way to avoid it happening is to follow instructions carefully. Make sure that the guide you are following works for your device and that any custom ROM you flash is designed specifically for it. If you do your research and pay attention to feedback from others, bricking should never occur.
Security risks: Rooting may introduce some security risks. Depending on what services or apps you use on your device, rooting could create a security vulnerability. For example, Google refuses to support the Google Wallet service for rooted devices.
Rooting Your Android Phone
Rooting an Android Phone can vary in ease depending on the model as well as the familiarity the person doing the rooting has with tech.
Three rooting soft wares that have garnered some attention in the past few months — Towelroot, Kingo Root, and KingRoot. They will root your device in the time it takes to brush your teeth. However, these rooting programs are only compatible with Android devices running something earlier than Android 5.1 Lollipop. For example, King Root claims it will root more than 100,000 devices, and even some running Android 5.0, but the majority of newer devices running Android 5.1 and higher don’t make the list.
King Root’s application is downloadable and you can simply download it and root your android device.
It is difficult to Root Samsung Galaxy 6 and latest models but you can buy any good Rooting software on Amazon and root the device.