Academics
Solitaire Lab
A card game that is secretly a statistics lab — predict first, then test a solitaire rule change on 20-200 real Klondike deals played BOTH ways by a solver that never over-claims (won / lost / not sure yet). Read an honest at-least/at-most range and a 95% interval, see which deals the rules disagreed on, learn why a bigger search proves more wins of the same deals, and download a CSV for a science-fair chart. On-device, no account. Ages 9-14.
#1F7A7A Distributed-narrative cast
Meet the cast
Solitaire Lab's crew each embody one STATISTICS move — the crew IS the method. Twinnie deals every hand twice so the test is fair, Hedgeworth never says more than the data can (at least ... at most ...), Maybelle reminds you an unknown is a maybe, not a no, and Bigsby knows more deals make the answer sharper. Mentor Dealia asks what you predicted before you look.
Dealia
(Mentor, a card-dealing raccoon) - asks what you predicted BEFORE you look at the data
Twinnie
Deals every hand twice - the same deals for both rules, so the test is fair
Hedgeworth
Never says more than the data can - reports at least ... and at most ...
Maybelle
Knows an unknown is a maybe, not a no - the search ran out of time
Bigsby
Knows more deals make the answer sharper - the interval gets narrower
What's inside
Learning goal
A card game that is secretly a statistics lab — predict first, then test a solitaire rule change on 20-200 real Klondike deals played BOTH ways by a solver that never over-claims (won / lost / not sure yet). Read an honest at-least/at-most range and a 95% interval, see which deals the rules disagreed on, learn why a bigger search proves more wins of the same deals, and download a CSV for a science-fair chart. On-device, no account. 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.
Mentored by Dealia — on-device AI, no data leaves the device.
How Solitaire Lab 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
Solitaire Lab 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
Solitaire Lab 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