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InventForge

Which pitching machine is most reliable? Before any formula, invent your own measure of spread from parts, name it after yourself, and test it on new cases. Then meet the textbook's measure and see where the two disagree. Ages 9–14.

▶ Play it now

Built for sittings of about 20 minutes on the screen. That is our design budget, not a measurement.

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Live In planning Swift 6 · SwiftUI · FoundationModels Recognize that a measure of variation describes how values vary with a single number (6.SP.A.3) Summarize numerical data sets, including measures of variability (6.SP.B.5.C) Hero color: #142e14
Engagement:

Distributed-narrative cast

Meet the cast

InventForge has two inventors. Tinkerwell builds a measure from parts before any formula, and Margrave tests it on new cases.

Tinkerwell portrait

Tinkerwell

(Hero, an inventor) - builds her own measure from parts before she meets any formula

Margrave portrait

Margrave

A tester - tries every invented measure on new cases, and keeps the ones that hold

What's distributed-narrative methodology? →

What's inside

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Learning goal

Which pitching machine is most reliable? Before any formula, invent your own measure of spread from parts, name it after yourself, and test it on new cases. Then meet the textbook's measure and see where the two disagree. Ages 9–14.

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Question kits

16 curriculum-aligned kits × 25 questions = 400 questions per app, mapped to recognized standards.

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On-device AI mentor

FoundationModels-powered hints, feedback, and adaptive difficulty — all running locally.

How InventForge 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

Full parent privacy guide →

Built with ForgeKit

InventForge 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

InventForge 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

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