How do you track your breastmilk stash?

Looking for an app to track my bm freezer stash. With my last baby I had an app that told me how long my freezer stash would last. I can’t for the life of me remember what app it was, and I want to use it again so I have an idea of how long my stash will last if I stop pumping.

The app “Baby Tracker” can do this.