Observed arrival · 2026-08-20
Inkerval Makes Math Practice Feel Like a Notebook
An iPad and Apple Pencil app for handwritten university-math practice, covering probability and differential equations.
Why it surfaced
Inkerval combines handwritten problem solving with a self-assessed spaced-repetition system: solve by hand, mark the attempt as solved or shaky, and let the app decide what returns tomorrow. Its launch plan is unusually concrete, with 400+ probability problems and 300+ differential-equations problems, all presented as verified practice rather than multiple-choice drills.
An iPad and Apple Pencil app for handwritten university-math practice, covering probability and differential equations.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
One card from the complete issue