Android is great if you are on a budget and can't purchase other operating systems for mobile devices. It is also great for installing third-party apps if you find one you like. Although there is a lot of customization options available, this may cause some users to become frustrated if they are unfamiliar with this system.
Kali is quite honestly appropriate for use on a Test Lab, a Virtual Machine, it will even run on a Raspberry Pi. It is the most popular tool used in most all training courses. It can be uses in home labs, work labs and production environments to perform real life scans for vulnerabilities among other things. It is the most popular tool for Cybersecurity tool.
It is very easy to use and the customer user interface is very smooth and logical. Rarely do applications crash and need reinstallation. The app store is secure enough to prevent malicious software from being advertised and potentially downloaded. Rebooting devices does not have to be a regular occurrence so this allows for high availability.
There are a lot of people that use Android around the world. There are many forums and blogs that you can read about Android. It is too easy to find information about the system and for developers, it is too easy to create an app. For me, it is one of the best operating systems.
These two operating systems are both great and can totally do everything that we need in our school. The reason we go with Android is that it is cheaper and we have a greater variety of apps available to us. iOS can be a little pricey and it also doesn't allow us to do the customization that we want.
The hard feature to be beat Kali with is the amount of preinstalled tools. I.e. Ubuntu is great but you would have to install each and every tool separately
Till now Kali Linux have not made a single penny negative impact on our companies business , its so powerful and useful at the same time for our company.