If you want to customize Home screen layout in iOS 10 and get the bulk of options without spending money then ReformX by zEstLabs is the best choice for you. ReformX offers a variety of options to make your Home screen look different from everyone else’s. This tweak provides you all kinds of settings for tweaking your Home screen, ranging from the layout of your Home screen icons, to the style of your dock, to the appearance of your folders and a lot more.
If you’re interested in trying ReformX out, you will need a jailbroken iOS 10 device. If you're already jailbroken then head right over to Cydia’s BigBoss repo and grab the tweak for free of cost. The tweak supports jailbroken iOS 9 - 10 devices. So if you're jailbroken on earlier iOS version you're out of luck.
Once the tweak is installed you will notice a new app icon that will appear on your Home screen. There you will find all the configuration options that are divided into groups to make finding them easier:
The tweak also offers another interesting feature. While there are multiple tweaks available on Cydia that are paid and more than capable of altering how a Home screen appears, including the app icon size, what makes ReformX so useful is its ability to save presets of how a device is configured.
In conclusion I can say that with ReformX tweak you can not only customize Home screen layout in iOS 10 but it is also possible to change the Home screen by resizing the dock, increase the size of the dock icon as well as change the icon size. It is also possible to increase or decrease the size of Home Screen icons for folders and applications. And you get all that options absolutely for free.