This iPhone repair tray was designed to match the design of an iPhone 6 and newer so the compartments are kind of shaped and placed where the different screws would need to be.
For example, there is a special compartment down at the bottom that aligns with where the two screws by the power connector are.
The tray is designed to print quickly and easily with limited filament and to also be used for easy phone storage. It will work with any phone, though Androids won't have compartment placement designed exactly around where the screws are.
There are two stl's. The small one takes less filament and can print quicker but has less space, and the bigger one is closer to the size of the phone and slightly easier to use.
There are two models instead of just scaling up the one so that the wall thickness can stay as thin as possible to keep the filament cost down.