Callback

Get the callback.

Callback is an iPhone app that prepares you for iOS developer interviews. It works offline — no account, no ads, no tracking; only anonymous screen-view analytics on our own server.

What's inside

• Eleven topics: Swift, Memory Management, Concurrency, SwiftUI, UIKit, Networking, Persistence & Data, Behavioral, Testing, Architecture & Patterns, and Mobile System Design.
• Short lessons with syntax-highlighted code, each ending in a quick check.
• Timed mock interviews with a pause-safe timer.
• A review queue that resurfaces what you got wrong or flagged.
• A readiness score that weights recent answers and topic coverage.

Support

Questions, bugs, or topic requests: babin@axveer.com. Source code lives at github.com/chiliec/Callback.

Privacy

Callback collects no personal data. See the privacy policy.