Academics
CastDojo
Design a cast, then test it on a younger kid. Pick a concept you truly know; invent six to twelve characters whose behaviour IS the rule; write chapter one; run a 15-minute playtest with a younger sibling or tutee; revise; export a cartridge you own. With a grown-up, you can send it to Spark & Anvil for review. Ages 15–18.
Built for sittings of about 25 minutes on the screen. That is our design budget, not a measurement.
#374151 Distributed-narrative cast
Meet the cast
Realistic teen cases, not cartoons: Lio, 16, whose first cast failed the swap test; and Esmé, 17, whose playtest with her little brother changed her chapter.
Lio
A 16-year-old designing a fractions cast - learns that a name is not a behaviour
Esmé
A 17-year-old who playtests with her brother - learns to watch more than she talks
What's inside
Learning goal
Design a cast, then test it on a younger kid. Pick a concept you truly know; invent six to twelve characters whose behaviour IS the rule; write chapter one; run a 15-minute playtest with a younger sibling or tutee; revise; export a cartridge you own. With a grown-up, you can send it to Spark & Anvil for review. 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.
How CastDojo 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
CastDojo 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
CastDojo 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