# Callback: Interview Prep — Interview prep for developers

> Interview prep for developers (iPhone/iPad app by Vladimir Babin.)

- Source: https://appshunter.io/ios/app/callback-interview-prep/id6796242315 (this page in markdown: same URL + `.md`)
- Developer: [Vladimir Babin](https://appshunter.io/developer/1557125814)
- Category: Education, Developer Tools
- Price: Free
- Age rating: 4+
- Requires: iOS 18.0 · 2 MB
- Languages: American English
- Released: 2026-08-21
- Data updated: 2026-09-11
- User reviews in markdown: https://appshunter.io/ios/app/callback-interview-prep/id6796242315/reviews.md

## What is Callback?

Callback prepares you for iOS developer interviews — on the train, in a waiting room, or the night before the real thing. Everything works offline. There is no account to create, nothing to sign in to, and no network connection required.

WHAT YOU GET

• Eleven topics — Swift, Memory Management, Concurrency, SwiftUI, UIKit, Networking, Persistence & Data, Behavioral, Testing, Architecture & Patterns, and Mobile System Design — each with focused lessons and a bank of interview-grade questions.
• Short, readable lessons with syntax-highlighted Swift, each ending in a quick check so you find out immediately whether it stuck.
• Timed mock interviews with a pause-safe timer that survives backgrounding, so a phone call doesn't cost you the session.
• A review queue that automatically resurfaces every question you got wrong or flagged — the fastest way to turn weak spots into strong ones.
• Behavioral questions come with a model-answer rubric you score yourself against, because that's how they're actually assessed.
• A readiness score that weights recent answers more heavily than old ones and accounts for how much of each topic you've actually covered.
• Full VoiceOver support, Dynamic Type throughout, and Reduce Motion respected.

PRIVATE BY DESIGN

Callback makes no network requests at all. Your progress lives on your device and nowhere else. There is no analytics SDK, no advertising, and no crash reporting. You can export everything you've done as a JSON file, or erase it in one tap.

Get the callback.


## Version history (last 1 release)

### 0.2.0 — 2026-08-21

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-11.*