Code! Learn Swift Version vs DevPrep

Easily learn how to code in Swift directly on your iPhone or iPad! Includes over 375 fun and fully interactive mini lessons and tutorials. WHAT OUR USERS ARE SAYING 5 Stars - “Very informative. It is the only app I know that lets you type in the code. This is important for learning efficiently. Bravo." 5 Stars - “Better than the docs! I don’t have much free time at home to go through the Swift docs, but I have time to kill on the daily commute. This pocket sized Swift resource just fits the bill perfectly." WHY USE CODE SWIFT? Want to be a better writer? Write more! Want to be a better coder? Code more! Want to be great in Swift? Write more Swift code! Code Swift offers you 26 Swift courses with bite-sized lessons where you have to write your own Swift code! You will be amazed how fast you can learn to code! Code Swift starts with the basics and assumes you have no prior programming experience. Code Swift is also a great resource for intermediate to advanced users because it makes it super quick and easy to review any of the more advanced topics such as filter, map, reduce, or delegates and guard statements, etc. Code Swift offers a totally unique experience by challenging you to write your own code from start to finish. There really is no faster and more enjoyable way to learn than writing your own code. Our realtime code checker instantly offers valuable tips and suggestions the moment you make a mistake. It is like having your own personal swift instructor sitting next to you to help you along and accelerate your learning and make sure that you won’t get frustrated, stuck, and give up. Afraid of getting stuck? Don't be! As soon as you make a mistake, you see a red exclamation mark. Just press on it to get step by step guidance and help so you are never stuck and never alone! Once you get more comfortable, you can also turn the real-time code checker off (this is great while working through the course a second time to make sure you truly know how to code). Need more help? Just press on the video link to have one of our instructors give you a step-by-step walk through and explain everything in more detail. Code Swift also acts as a Swift Guide in your pocket. Have a question or need a quick refersher on a specific topic? Just use our powerful search feature to instantly find great examples and code snippets with detailed explanations. Code Swift Courses: 1. Swift basics 2. True or False 3. If statements 4. Optional? 5. Arrays 6. Loop de loop 7. Strings 8. Dictionaries 9. Functions 10. Switch 11. Tuples 12. Enums 13. Structs 14. Classes 15. Tips and Tricks 16. Closures 17. Extensions 18. Properties 19. Protocols 20. Delegates 21. Type Casting 22. Generics 23. Map Filter Reduce 24. Sets 25. Guard & Defer 26. Error Handling The first course is completely free. All other courses can be unlocked with a single in-app-purchase. Once purchased, you will instantly qualify for all future additions and updates including future courses. If you have any questions or concerns, please email us at support at happymooseapps.com

Prepare for your iOS developer interview with a plan — 5–10 minutes a day. Hundreds of questions across 20+ topics and 1,000+ interactive challenges — the library grows 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 • Practice: 1,000+ challenges in 9 formats — what does it print, find the bug, assemble the code, pick the fix, fill in the blank, will it crash?, estimate the complexity, select all that apply, is this API real? — with hints, explanations, Easy / Medium / Hard difficulty and a personal feed that targets your weakest topics • AI-assisted development: review AI-generated code, spot made-up and deprecated APIs, prompts and context, theory and ready-made project rule templates — ship code with AI faster and with confidence • iOS and AI dev news: today's highlights in short, full articles right in the app and one-tap translation • Daily challenge and Streak widgets, Siri and Shortcuts, find articles right from iPhone search • On-device AI on iPhones with Apple Intelligence: explain answers in your own words and get hints • Company prep: interview stages at 24 tech companies based on public candidate reports, what candidates were asked, a day-by-day plan up to your interview date — and you can share your own questions • Timed mock interviews, a weekly challenge, tracks and an activity calendar • Mobile system design: 20 cases with step-by-step walkthroughs and self-checks • Behavioral interviews: 46 questions, your own STAR stories and timed drills • Today: what to review, what to learn next, a daily puzzle and your weak spots • A prep roadmap for Junior, Middle and Senior — stages with must-know checklists • Tasks from real interviews and “what does this code print” puzzles with full solutions • Spaced-repetition trainer: missed cards come back in the same session • Apple-docs-style answers with Swift 6 code and syntax highlighting • A level filter across the whole library — study exactly what you need • Progress by topic, a daily streak and goal • Daily reminders and progress sync via iCloud • Light and dark themes, Russian and English — switch on the fly • Works fully offline — all content is saved on your device • Optimized for iPhone Duo and iPad We continuously update and expand the library of questions and tasks — new content arrives without an app update. Basic topics and the daily challenge 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.