DevPrep vs Lattice

Ace your iOS developer interview and keep your skills sharp. Hundreds of questions and hands-on coding tasks across 21 topics — the base is updated regularly: Swift, SwiftUI, Swift Concurrency (async/await, actors), Combine, memory & ARC, multithreading & GCD, UIKit, Auto Layout, architecture (MVVM, VIPER, Clean), Objective-C, algorithms & data structures, networking, testing and soft skills. WHAT'S INSIDE • Apple-docs-style answers with syntax-highlighted code • Hands-on coding tasks with full solutions: “predict the output”, “find the bug”, “implement it” • Junior / Middle / Senior and Legacy / Modern level tags — study exactly what you need • Progress tracking, a “learned” marker, a daily streak and goal • A spaced-repetition flashcard trainer and a “Hard” deck • Built-in search and an in-app reader for external materials • Light and dark themes • Full Russian & English — switch on the fly • Works offline We continuously update and expand the library of questions and tasks — new content arrives without an app update. Basic topics are free. Full access to all questions, tasks and materials unlocks with a subscription. SUBSCRIPTION Payment is charged to your Apple ID at confirmation of purchase. It auto-renews unless auto-renew is turned off at least 24 hours before the end of the current period. Manage your subscription in your Apple ID settings. Terms of use and the privacy policy are available in the app.

The laptop is where you grind a full problem. The phone is where you learn which tool the brief is asking for. Lattice names the core sections of data structures and algorithms and quizzes you on them. A break is recognize, diagnose, reconstruct. Smell names the tool from an unlabeled brief. By the time you sit down to a problem set, you already have the map. Progress stays on the phone. A break Recognize. Name the pattern from a tight prompt and a strip of code. Diagnose. Find the stall: bound, structure, or walk. Reconstruct. Put the move back in order from tokens or blanks. Smell A separate gym. Name the tool from a brief with the label stripped. On the phone The pack ships in the app. Scores and review live on the device. You do not need an account. Offline. A spare minute is enough. Made by Embedded Nature.