A free, open-source AI tutor for kids that runs entirely on your own computer. No accounts, no subscription, nothing leaves the device. The model only explains - a deterministic checker marks every answer, so it can't tell your child a wrong answer is right. Github: avps82/mentar
I'm a parent and a developer. I wanted an AI tutor for my kids that didn't need an account, a subscription, or their homework questions going to someone's cloud. I couldn't find a free one, so I built it — and I'm open-sourcing it because other parents shouldn't have to.
The bit I care about most: the AI never grades anything.
Every question comes from generators I can actually read - 934 topics across Years 1–12, for Australian, Indian, Singaporean and US curricula. A deterministic checker marks the answers. The model's only job is explaining: analogies, worked examples, "have another look at step 2" nudges. Worst case, a hallucination gives my daughter a clumsy explanation. It can't tell her a wrong answer is right.
It runs fully local on Ollama or llama.cpp - my test machines are a base M1 MacBook and an old gaming rig with a 3080. There's also an optional cloud mode if you'd rather use an OpenAI or Anthropic account; it's off by default and asks for explicit consent first, because that's your child's conversation leaving your house.
Being straight with you, because it's a kids' product: this is a research preview for supervised use — a grown-up in the room. Most of the code is AI-written under my direction and review (the README says so on the first screen), and the safety layer has not had a professional safeguarding audit. I'm an unfunded side project, and I'm looking for that review pro bono. There's a ready-made packet in the repo for anyone qualified who's willing to look.
It's AGPL, on purpose: if someone ships kids a modified version, the safety changes have to be inspectable.
No startup, nothing to sell, just a parent with a repo. My kids are the first users, so ask me the hard questions.