Ally Aldridge: Do you keep notebooks of story ideas?

I use the Simple Note app for jotting down ideas as I always have my mobile phone with me.

I do have physical notebooks but tend to use them more for development. For example when I sit down to flesh out an idea. This could be for jotting down research or for outling my plot or character development like their backstory. I also jot down useful tips I’ve picked up from reading blog articles or watching videos by other authors.

How about you? Where do you keep you story ideas?