Native iOS / offline first / product restraint

Sprout Math

A focused K-5 iOS math product built around offline reliability, local progress, deterministic hints, parent trust, and a deliberately narrow V1. The first version earns trust through restraint.

Implemented native productLocal release evidence

Platform: SwiftUI
Content: 2,400+ templates
Audio: 2,500+ clips
Privacy: No accounts

Open live site ↗ View GitHub ↗ Visual worlds Offline system Privacy and terms

Decision: Keep progress, content, hints, and diagnostics on device with no account requirement.
Why: A child-focused first release needs predictable help, fast sessions, and a small privacy surface.
Result: A native SwiftUI product with 2,400+ templates, 2,500+ audio clips, and six visual worlds.

Quick readRestraint

Product restraint carries the value.

Kids apps lose trust when they lag, require accounts, push subscriptions, or bury parents under settings. Sprout Math keeps the core loop local, the hints deterministic, and the session design short enough to remain calm.

Focused learning loop

Short sessions, adaptive placement, visible progress, and deterministic correction after repeated misses.

Parent trust first

Parent-gated settings, local diagnostics export, no ads, no accounts, no surprise network dependency.

Content model

40 lessons, K-5 curriculum, 2,400+ templates, 2,500+ narrated clips, 6 visual worlds.

Architecture

Core Data persistence for profiles, attempts, mastery, history, and progress state vectors.

VisualsEvidence