Screen Size is a handy tool for UI designers or engineers.
Enter screen size in pixel and diagonal in inch and then you will get screen size in inch/cm resolution in ppi and common aspect ratios such as 16:9 (full version only).
Common screen sizes are included.

Free version:
> No common aspect ratios supported.
> With ads.

Full version:
> Show common aspect ratios if matched.
> No ads no distractions.