Academics
PremiseBench
Take the lids off four famous models: a growing city, neighbours who move, a shared pasture, an outbreak. Each opens as a diagram of stocks, flows and premises you can change. Change one premise, watch the conclusion move, and write a model card: what is in, what is left out, who would disagree, and what evidence would change your mind.
▶ Play it nowBuilt for sittings of about 25 minutes on the screen. That is our design budget, not a measurement.
#2d4f7c Distributed-narrative cast
Meet the cast
Three people at the bench, each with one habit of a careful modeller. Dr. Okafor asks what the model leaves out, Ngozi changes only one premise at a time, and Bertil asks who would disagree and what evidence would change his mind.
Okafor
(Guide) A retired city planner - before any run she asks what the model leaves out
Ngozi
A public-health student - changes exactly one premise at a time, so a change in the result has one cause
Bertil
A debate coach - asks who would disagree with the model and what evidence would change his mind
What's inside
Learning goal
Take the lids off four famous models: a growing city, neighbours who move, a shared pasture, an outbreak. Each opens as a diagram of stocks, flows and premises you can change. Change one premise, watch the conclusion move, and write a model card: what is in, what is left out, who would disagree, and what evidence would change your mind.
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 Okafor — on-device AI, no data leaves the device.
How PremiseBench 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
PremiseBench 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
PremiseBench 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