STEM
TectonicForge
Pilot a drill into Earth's mantle, watch continents drift across 250 million years, trigger earthquakes and volcanic eruptions, and become a geological hazard engineer protecting cities from the dynamic planet beneath your feet.
▶ 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 Geo
#29B6F6 TectonicForge is a plate tectonics, earthquake, and volcano science lab where you drill into the Earth's interior, watch continents drift across 250 million years, trigger earthquakes and volcanic eruptions, and engineer geological hazard solutions to protect simulated cities. Your AI mentor Geo connects everything to real geological events happening around the world right now.
Characters who teach
Meet the cast
TectonicForge's characters each teach one way the Earth moves and changes. Sink shows one plate sliding under another, Spread shows plates pulling apart, Slide shows plates catching and slipping, Vent explains volcanoes, and Tremor explains earthquakes and how to prepare. Churn, Heave, Remake, Scour, and Silt cover the heat that moves plates, mountain building, the rock cycle, erosion, and rock layers as a record of time. Geo is the mentor, and the app handles disaster topics gently.
Sink
Convergent/subduction boundary — the heavier plate finds its way down; it takes a long time; that's okay
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Spread
Divergent boundary + new crust — when something pulls apart, something new is forming in the middle
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Slide
Transform boundary + stored energy — two plates sliding past; they catch, they hold, then they let go
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Vent
Volcanism + magma chemistry — eruptions tell us what was happening below
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Tremor
Seismology + earthquake preparedness — earthquakes are the Earth telling its story; we can read the lines; we can be ready
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Churn
Mantle convection — the engine that drives the plates — 'Deep heat moves the whole map.'
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Heave
Mountain-building — folding + uplift at collisions — 'Push long enough and mountains rise.'
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Remake
The rock cycle — igneous, sedimentary, metamorphic — 'Nothing is ever really finished.'
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Scour
Weathering + erosion — wearing down the land — 'Water and time win.'
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Silt
Deposition + strata — reading rock layers as time — 'Every layer is a page.'
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Browse all chapters → · What's distributed-narrative methodology? →
What's inside
Earth Interior Explorer
Tap to drill down through the Earth's layers. Discover the crust, upper mantle, lower mantle, outer core, and inner core. Each layer has different properties —
Plate Motion Lab
Drag tectonic plates and watch what happens when they collide, separate, or slide past each other. Convergent boundaries create mountains and volcanoes. Diverge
Earthquake Simulator
Trigger earthquakes and watch seismic waves propagate outward from the epicenter. See P-waves (fast, compression) arrive before S-waves (slower, shearing) at di
Volcano Science Lab
Adjust magma composition (silica and gas content) to control eruption style. Low silica creates gentle Hawaiian-style lava flows. High silica and high gas conte
Mentored by Geo — on-device AI, no data leaves the device.
How TectonicForge 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
TectonicForge 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
TectonicForge 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
