STEM
RaceForge
Two tasks. One shared counter. What could go wrong? Predict the smallest value a data race can produce, watch the exact interleaving that loses an update, then wrap it in an actor and see the race vanish. RaceForge enumerates every possible interleaving on your device — no guessing, no magic — so you can feel exactly what Swift 6 is protecting you from when it checks concurrency at compile time. Ages 15–18.
#4a6cd4 Distributed-narrative cast
Meet the cast
RaceForge pulls a data race apart into the pieces that make it happen — the crew IS the concurrency concept. Sheara is the shared state (one variable two tasks both touch); Trice is the non-atomic step (`+= 1` is really three operations — read, add, write — that can be split apart); Baton is the interleaving (whose step runs next, handed back and forth). Mentor Isla is the actor — the isolation boundary that lets only one task touch the state at a time, so each operation becomes atomic and the race can no longer be written. 15–18, text-forward (R-OLDER-TEEN-DN-ADAPTED) — illustrated portraits/chapters/audio are N/A for the older-teen band, not a follow-on.
Sheara
Shared state — one variable both tasks can read and write; the moment it is shared AND mutable, a race is possible
Trice
The non-atomic step — `counter += 1` is read-modify-write, three operations another task can land in the middle of
Baton
The interleaving — the exact order the two tasks' steps happen to run in; some orders are fine, some lose updates
Isla
(Mentor) The actor — an isolation boundary that serialises access so only one task touches the state at a time; each operation becomes atomic and the race cannot be expressed (the idea behind Swift 6 strict concurrency)
What's inside
Learning goal
Two tasks. One shared counter. What could go wrong? Predict the smallest value a data race can produce, watch the exact interleaving that loses an update, then wrap it in an actor and see the race vanish. RaceForge enumerates every possible interleaving on your device — no guessing, no magic — so you can feel exactly what Swift 6 is protecting you from when it checks concurrency at compile time. Ages 15–18.
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 Isla — on-device AI, no data leaves the device.
How RaceForge 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
- ✅ COPPA compliant under the 2026 FTC amendments
- ✅ Parental controls + session limits + content filters built in
RaceForge 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
RaceForge 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