Apps your kid can actually use.
Privacy you can actually verify.
What we don't do
- 🚫
No ads
Zero advertising, ever. No banner ads, no rewarded video, no sponsored content.
- 💸
No in-app purchases
You pay once. Your kid can't accidentally buy anything. No power-ups, no premium currency, no upgrade nags.
- 👁️
No tracking
No analytics SDKs tracking your kid. We use Plausible (privacy-first, no cookies) on our website only — never inside the apps.
- 🔗
No third-party SDKs
The apps don't embed Facebook, Google, AppsFlyer, or any other tracking framework. Just Apple's own frameworks plus our open-source ForgeKit library.
- ☁️
No data leaves the device
All your kid's progress, settings, and AI-generated content stays on their device. Nothing uploads to our servers (we don't even have user-facing servers).
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
(Founder note — to be supplied.)
Modeled on Sago Mini's "Letter to Parents". Will cover: why we built Spark & Anvil, the values that guide app design, how to think about screen time with our apps, and an invitation for parents to co-play.
Frequently asked questions
- Are the apps free?
- Each app is sold individually on the App Store at a one-time price. No subscriptions, no in-app purchases, no recurring fees. Once you buy it, it's yours.
- What ages are these for?
- We target ages 9–14. Some apps skew younger (Wave 1+2 apps often work for 9–11), some skew older (e.g., LogicQuest, ProofQuest are best for 12–14). The 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.