With the upcoming new RetroArch version, it will be possible to use your fingers as a lightgun on iOS and Android. Not only that, but it supports multi-touch too! (iPhone XS Max shown in this video)

What you see here in this video is a demonstration of all the cores that include support for this new feature. The device being used here is an iPhone XS Max, and it’s plenty powerful enough to even run the likes of Mednafen/Beetle Saturn!

Here is a list of the cores so far that support this (along with the systems they support) –