Sprout Math — offline math practice for kids
Sprout Math is an offline iOS practice app that gives kids short math sessions without accounts, ads, or analytics. Progress stays on the device.
1
A tour of the app
Themes
Six visual worlds to practice in.
Candyland 
Axolotl Lagoon 
Rainbow Unicorn 
Stars and Space 
Superhero City 
Turbo Cars Question types and stickers
Question variety comes from a maintained template bank, not remote generation. Stickers and progress are saved on the device.
Narration
Narration is built in and bundled with the app.
Parent curriculum and gates
A bundled K–5 practice curriculum, with settings behind a parent gate.
2
The work
6 chapters
2.1
The problem
Kids' math apps lose parents' trust when they lag, require accounts, push subscriptions, or bury parents under settings.
2.2
Why it mattered
Children need predictable help and short sessions. Parents need control over their child's data. A first release for kids should have a small privacy surface.
2.3
Privacy
Profiles, attempts, mastery, lesson state, stickers, and history stay on the device. There are no accounts, ads, analytics, or subscriptions, and no surprise network dependency. Settings sit behind a parent gate, and diagnostics export locally instead of going to a remote service.
2.4
What I did
Short sessions over endless play, so practice stays repeatable and parent-friendly.
Deterministic hints over generated tutoring. Kids need predictable help before cleverness.
Universal iOS with portrait lock. Fewer layout modes protect quality in a first version.
Local diagnostics export instead of remote analytics.
2.5
Stack
Native iOS (universal, portrait). Core Data for profiles, attempts, mastery, history, and progress. Bundled content, templates, and narration; no network dependency.
2.6
Three-tier deterministic hints
After repeated misses, the app steps through three fixed hint levels and then shows a predictable correction. Nothing is generated on the fly.
3
Contact
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