photo & memo - memorize with

You can save photos with titles and notes.
If you make a note of things that you might tend to forget, you can look back on them later.
If you take a photo while traveling, you can make notes about what happened before and after the photo, or information about the place itself that wasn't in the frame of the photo.
If you made a bento box, you can record things like what you thought of it, or which one turned out particularly well.
If you're a fisherman, you can record the size of the fish you caught, what bait or lure you used, and how long it took to catch the fish.
You can also record seasonal events. For example, when there was a heavy snowfall, you can record how you dealt with it and how difficult it was.
The ways you can use it are varied and endless.