STEM
ErrataQuest
The Hall of Good Mistakes. Each room holds an idea careful people believed for good reasons. Read why it made sense, then pick the observation that broke it. Two rooms hold right ideas that were doubted, and one a great scientist's error. Every room cites a source. Ages 9–14.
▶ Play it nowBuilt for sittings of about 20 minutes on the screen. That is our design budget, not a measurement.
#2e180b Distributed-narrative cast
Meet the cast
ErrataQuest has two guides to the Hall of Good Mistakes. Erratta shows why an old idea made sense, and Wrongwell finds the clue that broke it.
Erratta
(Guide, a museum keeper) - shows each old idea with respect and explains why careful people believed it
Wrongwell
A detective - finds the one observation an idea could not explain
What's inside
Learning goal
The Hall of Good Mistakes. Each room holds an idea careful people believed for good reasons. Read why it made sense, then pick the observation that broke it. Two rooms hold right ideas that were doubted, and one a great scientist's error. Every room cites a source. Ages 9–14.
Question kits
16 curriculum-aligned kits × 25 questions = 400 questions per app, mapped to recognized standards.
On-device AI mentor
FoundationModels-powered hints, feedback, and adaptive difficulty — all running locally.
How ErrataQuest handles your kid's data
- ✅ All progress, settings, and AI-generated content stays on the device
- ✅ No analytics, no tracking, no third-party SDKs
- ✅ No ads, no in-app purchases — you pay once
- ✅ No personal information collected from children — in line with COPPA (updated by the 2026 FTC amendments)
- ✅ Parental controls + session limits + content filters built in
ErrataQuest runs on ForgeKit — the open-source Swift Package Manager framework that powers every Spark & Anvil app. ForgeKit ensures consistent accessibility, COPPA compliance, and design language across the portfolio, so your kid's progress and preferences feel coherent across every app they touch.
Coming to the App Store
ErrataQuest is in active development. Email us to hear when it ships — no marketing, no spam, just a one-shot launch announcement.
Email me at launch