A free, offline-capable math quiz app
Free offline math quiz app, but Khan Academy already does this better.

Free worksheet generator, but Google Classroom and IXL already own this space entirely.
K-5 teachers and parents doing math drills at home
Khan Academy · IXL Learning · Mathway
Free offline math quiz app, but Khan Academy already does this better.
Can't evaluate — the Zenodo link returns 403 Forbidden blocking all access.
Free AI coloring worksheets for teachers, but AI image generators already do this.
Tone-colored characters + offline desktop app fills a real gap for home Chinese learning.
LLM wrapper for math proofs when models still hallucinate on basic arithmetic.
Prerequisite graph + spaced repetition schedules LeetCode problems, but Codeforces already does adaptive difficulty.