Foundations · Path A

Concurrency you can trust

Swift 6's strict concurrency, the @Observable model, and SwiftData — taught by shipping small, real apps.

Overall progress

38%

4 of 6 units started · 2 projects shipped

Units

Annual WWDC re-verification · last checked Jun 2026

1 · Values, Optionals & Errors

8 lessons · 3 exercises · 1 checkpoint

Complete

2 · Strict Concurrency

Actors, Sendable, isolation, async sequences

In progressContinue

Lesson 5 of 9 — “Sending values across actors” · 1 published

Tutor AITier 0 · no backend

3 · Observation & SwiftData

Unlocks after the Concurrency checkpoint

Locked

10 mini-clones · climbing backend tiers

ShippedTier 0

Tally

A counter that survives relaunch. State & @Observable.

ShippedTier 1

Shelf

Local library with SwiftData. Queries & migration.

BuildingTier 1

Ripple

Offline-first notes with actor-isolated sync engine.