How to optimize file size for Ionicons?

So I just started cleaning up my files to make my app ready for distribution and release. I noticed the Ionicons files are quite huge, almost 700kb in sum. They are nice, but this is more than all the images my app has in total. So I would very much like to find a solution for this.

Is there a (simple?) way to make these smaller and include only the icons I actually use?

Some interesting ideas here: Reduce apk size - Ionicons necessary font files Obviously you just get rid of some of the files without loosing any functionality.