Looks like it uses yahoo_finance_api in rust. In theory that supports options, but no idea whether this tool handles that data properly, I didn't feel like searching that hard.

It's gonna take a lot to pry me away from my spreadsheets. They are simple and just work. Ages and ages ago I used MS Money but once they shut down I never migrated to the 'sunset edition,' just switched to excel. I keep trying things, but without local, automatic sync to my accounts, nothing is as simple and effective as a simple spreadsheet, for me.