What does HackerNews think of awesome-quantified-self?
:bar_chart: Websites, Resources, Devices, Wearables, Applications, and Platforms for Self Tracking
They have a huge community and tools ecosystem.
You might also want to check the Awesome List "Quantified Self" [2] if you like these kind of tools.
Mnemosyne/Anki, (FreeMind, yEd, Gephi, AtomSpace as-moses, RDF bnodes, ONNX,) mind maps, RestructuredRext, MyST-Markdown, todo.txt (TaskWarrior,), StructuredProcrastination, ActivityWatch, Dogsheep, *-to-sqlite, awesome-quantified-self, https://github.com/woop/awesome-quantified-self
But metrics for actual memory retention? I've heard of TinCan xAPI w/ a LRS. nbgrader, Khan Academy exercises, OpenBadges to demonstrate proficiency,
It's similar to what you're describing and aligns well with the idea of using your personal data in a more open way.