A few hundred years ago it was common for folks (with the means) to keep commonplace books[0] to track information. What they did, what they read, etc. Outside of school & University, it's very uncommon for people to keep with this tradition. In fact, my son recently graduated HS and it was 10x more common for a teacher to hand out notes than it was for him to take notes, so even that's dying. I'm pretty sure you could deduce my kids' days based on Instagram more than anything.
I think if you assume a world where everyone keeps notes, then these just seem like systems for people that do not have one. But for those that have kept notes, these apps do offer some innovation over the plainest of plain text systems.