STEM
BridgeForge
Build bridges between math and the rest of the world — and test that they hold.
▶ Play it nowBuilt for sittings of about 20 minutes on the screen. That is our design budget, not a measurement.
Meet your mentor
Every Spark & Anvil app has a friendly mentor character that demonstrates, asks, and patiently scaffolds learning. On-device AI personalizes the mentor's responses to your kid's progress — never connecting to a server, never collecting data.
Mentored by Archie
#29B6F6 BridgeForge shows you how math connects to everything! Build bridges between math and other subjects like science, art, music, and social studies by solving problems that use both at the same time. Each bridge you complete proves that math is not just numbers on a page -- it is everywhere.
Characters who teach
Meet the cast
BridgeForge’s cast of ten each carry one bridge between math and another subject — Truss to science, Arch to art, Pier to social studies, Splice to writing, Cable to music, and five more. Archie asks the question every bridge has to answer: does it really hold?
Truss
Math↔Science bridges — causal-evidential connection (measurement + replication; both sides need numbers)
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Arch
Math↔Art bridges — proportion you can measure (symmetry + ratio; look, measure, check)
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Cable
Math↔Music bridges — ratio-temporal connection (frequency ratios + rhythm; math you can HEAR)
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Pier
Math↔Social-Studies bridges — data-narrative connection (statistics in history + civics; numbers + people)
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Splice
Math↔ELA bridges — structure-metaphor connection (sequence + symmetry in writing; math is the bones)
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Girder
Math-computing bridge — order-of-operations is the same as sequence in code; math you can run
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Rivet
Math-movement bridge — rate, angle, and trajectory; a jump is math in the air
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Ballast
Math-health bridge — ratio, scaling, and balance; the right amount in the right proportion
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Strut
Math↔Cooking bridge — proportional reasoning; a recipe is a ratio you can scale up or down
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Trestle
Math↔Gardening bridge — spatial reasoning; a garden bed is geometry you can grow
Read chapter →
Browse all chapters → · What's distributed-narrative methodology? →
What's inside
Bridge Building
Each bridge has several segments. To complete a segment, you solve a problem that combines math with another subject. For example, you might use fractions to mi
Subject Map
Explore the map to find new bridge-building sites. Each location connects math to a different subject. The more bridges you build, the more of the map you unloc
Design Challenges
Take on special challenges that require you to use math skills in creative ways. These are tougher but earn bigger rewards!
Mentored by Archie — on-device AI, no data leaves the device.
How BridgeForge handles your kid's data
- ✅ All progress, settings, and AI-generated content stays on the device
- ✅ No analytics, no tracking, no third-party SDKs
- ✅ Free — no ads, no in-app purchases
- ✅ No personal information collected from children — in line with COPPA (updated by the 2026 FTC amendments)
- ✅ No chat with strangers — play-together rooms use a short code and preset emotes, never typed messages
BridgeForge 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
BridgeForge 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
