iPad and Apple Pencil
The iPad study app that does more than hold your notes
The usual iPad setup is three apps: one to write in, one to ask for help, and one to drill with. Nothing you write in the first is visible to the other two, so you become the integration layer.
The three-app problem
It works, in the sense that each app does its job. The cost is that you spend your revision moving information between them by hand: retyping a question into a chatbot, deciding for yourself which topic to drill, keeping the whole picture of what you can and cannot do in your head.
That last part is the expensive one. Nothing in the setup remembers last Tuesday, so the decision about what to revise falls to you every time, and it is the decision you are least equipped to make.
One notebook that notices
Plumi puts the three in one place, and the joins are where the value is. You write with Apple Pencil the way you already do. When you get stuck, help appears in the margin. What the work proves is recorded, and what it reveals becomes your next practice set.
The notebook itself is a real notebook: pens, pencil, highlighter, eraser, lasso, folders per subject, PDFs you can annotate.

Made for the Pencil, not adapted to it
Handwriting is the input, so latency and palm rejection are not polish, they are the product. Plumi is built for iPad and Apple Pencil specifically rather than shipped as a tablet version of a web app.
There is no phone version and no browser version at launch, for the same reason: you cannot do four lines of algebra with your thumbs.
- Requires iPadOS 17 or later and an Apple Pencil.
- Free to write in — the notebook is not the thing being sold.
- Focus sessions hold other apps shut until your session ends.
Questions students ask
- What do I need to run it?
- An iPad running iPadOS 17 or later, and an Apple Pencil. Plumi launches on 25 September 2026.
- Is there an iPhone or web version?
- Not at launch. Plumi is built around handwriting with a Pencil, which does not translate to a phone screen or a trackpad.
One app instead of three.
Plumi hasn’t launched yet. The community is where you see it first.