Crimsora
Freemium
High school students preparing for APs, SAT, or ACT
Most math apps reward the right answer — which teaches kids exactly nothing about the AI-generated answers they'll encounter everywhere else. Lathoa flips that: every session is built around catching a wrong answer, not producing one.
Lathoa presents a fixed AI character named Errol who solves math problems with one deliberate error hidden in the steps. Kids identify the bad step and explain it in their own words — skipping the explanation blocks the rank-up, so passive clicking doesn't work. Three difficulty tiers (Obvious, Sneaky, Expert) and a case-file replay system give parents something concrete to point to. The free tier caps at three cases per day per kid; a parent dashboard and misconception flagging are paid-only features. Families who hit the daily cap and want deeper progress visibility need a paid subscription to get there.
Bottom line: Pick Lathoa if you want a structured, ad-free way to build error-spotting habits in a 10-to-14-year-old; hit the wall when you need more than three cases a day without paying or want progress data beyond the child's own rank.
1 kid profile, Obvious tier only, 3 cases per day
1 kid profile, all tiers, unlimited cases, replay
Everything in Learner plus parent dashboard
Up to 4 kids with shared dashboard
View full pricing on lathoa.ai →
Pricing may have changed since last verified. Check the official site for current plans.
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Freemium
High school students preparing for APs, SAT, or ACT
Freemium
English learners seeking speaking practice
Most math apps reward the right answer — which teaches kids exactly nothing about the AI-generated answers they’ll encounter everywhere else. Lathoa flips that: every session is built around catching a wrong answer, not producing one.
The vendor states Lathoa presents a fixed AI character named Errol who solves math problems with one deliberate error hidden in the steps. Kids identify the bad step and explain it in their own words — skipping the explanation blocks the rank-up, so passive clicking doesn’t work. Three difficulty tiers (Obvious, Sneaky, Expert) and a case-file replay system give parents something concrete to point to.
The free tier caps at three cases per day per kid; a parent dashboard and misconception flagging are paid-only features. Families who hit the daily cap and want deeper progress visibility need a paid subscription. The docs describe a 7-day free trial and subscription pricing model. Free tier limits are 3 cases per day, Obvious tier only, 1 kid profile, no replay or parent dashboard.
Use cases include practicing identification of errors in step-by-step math reasoning, building skills to question AI-generated answers, supplementing homework with structured critical thinking exercises, and tracking progress through replayable annotated cases. It runs on web browser, iOS, and Android.
Best for kids aged 10-14 learning math, parents seeking AI-literacy tools, homeschool or after-school critical thinking practice, and families wanting ad-free, verified content. The three calibrated difficulty tiers avoid the plateau that kills engagement on fixed-difficulty apps, and mandatory written explanations build the habit of articulating reasoning. Skip it if the free tier’s three-case daily cap and lack of parent dashboard on the free plan leave insufficient signal for intervention on specific gaps, or if coverage limited to math error-identification in the 10–14 age range does not match needs.
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