Lathoa
Math app that teaches critical thinking by catching AI mistakes on purpose
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Lathoa is a math app for kids aged 10–14 with a completely different idea: instead of rewarding the right answer, it rewards the right question. The main character Errol is a robot who solves problems step by step, but one step is always deliberately wrong — and the child's job is to find the mistake and explain why it breaks.
The app was built because kids will face hundreds of answers from chatbots, classmates, and strangers online every day, and the ability to spot a broken one is the most important skill in the AI age. Errors come in three tiers — obvious, sneaky, and expert — and catching harder mistakes earns rank-ups from Rookie to Inspector to Sherlock.
The free plan includes three cases per day forever; paid plans start at $66.99/year with a seven-day free trial (no card needed). The app shows no ads, collects no data on children, and is COPPA-compliant from day one.
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Why we picked it
At a time when kids fill their days chatting with bots, this app teaches them the one skill no language model can hand them: systematic skepticism. Smart concept, privacy-respecting design, and genuinely useful.
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