Spark & Anvil
Mission-driven non-profit

Apps your kid can actually use.

Privacy you can actually verify. Designed for face-to-face play.

Spark & Anvil is restructuring as a 501(c)(3) non-profit. All apps remain free forever. Read the mission →

What we don't do

How we handle data

Spark & Anvil apps are on-device first. Your kid's progress, settings, AI-generated content, and any creations they make stay on their iPhone, iPad, or Mac.

We use Apple's SwiftData framework for local storage, FoundationModels for on-device AI generation (no cloud calls), and SwiftUI for the interface. We don't operate any user-facing servers — there is literally no backend collecting your kid's data.

For our company website (this site), we use Plausible — a privacy-first, cookie-free analytics tool. It tells us roughly how many people visited each page. It does not track individuals, store cookies, or sell data.

Read the full privacy policy for details. The parent-friendly summary is at the top; the comprehensive legal version follows.

A letter to parents

Hi — I'm Nathan, the person who started Spark & Anvil. I want to write to you directly, parent to parent, about what we're trying to do here and why it might matter for your kid.

I started building these apps because I wanted, for my own kid, the kind of educational software I couldn't find on the App Store in 2025. Software that wasn't an ad farm. Software that didn't lock the good stuff behind a $14.99/month subscription. Software that wasn't shipping every tap of your kid's finger off to someone else's analytics dashboard. Software that didn't try to be everything to everyone — but instead picked one specific thing your kid could learn and built a careful, joyful path through it.

Today there are 138 of those apps, across math and reading and science and music and art and emotional regulation and chess and ciphers and a hundred other things. Every one of them is free, ad-free, with no in-app purchases. Every one of them runs entirely on your kid's device — no servers, no telemetry, no third-party SDKs. The AI mentor inside each app is Apple's on-device FoundationModels — your kid's questions never leave the iPad. We're a 501(c)(3) non-profit (pending), and we plan to keep it that way. Forever isn't a marketing word; it's a structural commitment baked into how the organization is built.

Three things shape how we design every app. I want to name them so you can decide whether they match what you want for your family.

One — the cast IS the curriculum. Every app has a small group of named characters who recur across the lessons. Sir Pinwell IS the chess pin. Direct-Proof Dora IS direct proof. Stride IS the linear function. Your kid isn't watching a mascot dance around a math worksheet — they're meeting a character whose recurring behavior literally is the pattern they're learning. We call this distributed-narrative methodology, and it's grounded in 40 years of research on how kids build mental models through story.

Two — these apps are designed for face-to-face play. A growing number of them have a "pass-the-device" mode. You and your kid sit on the couch, hand the iPad back and forth, take turns, laugh, argue, restart the round. The device collapses into a shared object instead of a wall between you. The research on family-cohesion play is clear: kids learn faster, and feel safer, when an adult is co-present in the play moment. Browse the apps that ship pass-and-play modes — and ask us about the ones that don't yet.

Three — we take heavy content seriously. Some of our apps touch topics that aren't easy: history's harder chapters, climate change, online safety, loss, identity. For those, we follow SAMHSA's Trauma-Informed Care framework: every difficult unit ships with a content warning, an always-visible "skip" affordance, an audio-only mode, and a gentle co-noticing register that names what's hard instead of pretending it isn't. Where the content needs an outside voice we don't have, we bring in external sensitivity reviewers. We never use scare tactics on a kid.

About screen time — I want to be honest with you. I don't think screen time is a moral failing. I think it's a fact of life in 2026, and I think the question that actually matters is what's on the screen and who's next to your kid when they're using it. Our apps are designed to be put down. They have natural stopping points. They don't use streak-mechanics or notification spam to drag your kid back. And when you can, sit next to your kid for ten minutes and play together. Co-play multiplies what your kid learns and changes what the screen means in your household.

We're a small organization. I'm the founder; we're recruiting a founding board through 2026; we're applying for foundation grants and starting small district pilots in 2027. We don't have a big team or a marketing budget. What we have is the portfolio, the methodology, and a refusal to compromise on the things that matter: no ads, no tracking, free forever, designed for your kid and your family — not for a metric.

If you want to support what we're doing, the most valuable thing you can do is play the apps with your kid and tell us what you think. The second most valuable is to become a monthly donor — even $5/month helps. The third is to share us with another family who'd care.

Thank you for reading. Thank you for caring about what your kid uses.

— Nathan Tran
Founder · Board Chair
nathan@spark-and-anvil.com

Frequently asked questions

Are the apps free?
Yes — all our apps are free forever. No subscriptions, no in-app purchases, no recurring fees, no ads. Download as many as you want; they cost nothing.
Then how does Spark & Anvil make money?
We're a 501(c)(3) non-profit (pending). We're funded by foundation grants, school/district licensing, and individual donations — never by ads, in-app purchases, or child-data monetization. Our 2027 teacher network (live small-group classes inside our apps) is a teacher-led service where teachers keep 100% of class fees — Spark & Anvil takes 0%; Stripe charges ~3% direct, same as any payment processor. Every app. Every multiplayer feature. Free forever. No subscriptions. No in-app purchases. No ads. No tracking. We never monetize children directly.
What ages are these for?
Two age tiers, all free. Our main portfolio targets ages 9–14 (135 apps, most shipping now). We're also rolling out a Younger Cluster for ages 5–8 in 2027 (6 apps in flight — TinyLetters, CountingPals, TaleTrail, HuggyHabits, BugsCamp, MelodyMice). Each ages-5-8 app has a mascot that's a "younger sibling" to one of our ages-9-14 mascots, so kids can graduate from one portfolio to the other around age 8. The exact age band is listed on each app's page.
Do you use AI? Should I be worried?
Yes, we use Apple's on-device FoundationModels for things like AI mentors, hint generation, and adaptive feedback. All AI runs on the device — nothing your kid types or generates is sent to a server. There's no cloud-based AI processing personal data.
What about COPPA?
We comply with the 2026 FTC COPPA amendments (effective April 22, 2026). We don't collect personal information from kids under 13. We don't share data for advertising (we don't share data at all). We provide verifiable parental consent flows for any features that require it. Read the full policy.