Academics
WobbleForge
The phone as a measuring instrument, and every number from the world comes with a wobble. Time a pendulum three times and see the spread: does a heavier weight change the swing? Does a longer string? Then measure a tree's height with paces and tilt. Predict, measure three times, read the spread, say what you found.
▶ Play it nowBuilt for sittings of about 20 minutes on the screen. That is our design budget, not a measurement.
#1f6b5c Distributed-narrative cast
Meet the cast
WobbleForge's measurers know a number from the world is never exact. Wobbly measures everything three times, Swingle times the pendulum, Tiltwhit sights the treetop, and Spreadle says how far apart the readings are.
Wobbly
(Hero and guide, a careful penguin) - measures three times, because one reading could be a fluke
Swingle
A gibbon who swings - times ten swings, not one, so a slow thumb matters less
Tiltwhit
A giraffe who sights the treetop - distance and tilt together give the height
Spreadle
An owl who compares - a difference smaller than the spread is not a real difference
What's inside
Learning goal
The phone as a measuring instrument, and every number from the world comes with a wobble. Time a pendulum three times and see the spread: does a heavier weight change the swing? Does a longer string? Then measure a tree's height with paces and tilt. Predict, measure three times, read the spread, say what you found.
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 Wobbly — on-device AI, no data leaves the device.
How WobbleForge 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
WobbleForge 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
WobbleForge 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