InterviewOS vs Mockpit

Stop memorizing. Start mastering. InterviewOS is your all-in-one interview preparation app built for Flutter and Swift developers. Whether you're preparing for your first junior role or aiming for a senior position, InterviewOS gives you everything you need — lessons, exercises, quizzes, and real interview questions — all in your pocket. **Pick your track. Start learning.** Choose Flutter/Dart or Swift/iOS as your main focus. All content adapts to your selection — from beginner fundamentals to advanced topics. Switch tracks anytime. **Duolingo-style exercises** No boring walls of text. No typing long code. Just quick, tap-based challenges you can crush in 30 seconds: • Multiple choice questions • Fill-in-the-blank with word banks • Drag-to-reorder code lines • Spot-the-bug challenges • Swipe true or false • Match-the-pairs **500+ interview questions** Real questions asked at real companies. Organized by topic and difficulty — from junior to senior level. Each question comes with a detailed model answer, follow-up questions, and common mistakes to avoid. **General programming too** Not just framework-specific. InterviewOS covers REST APIs, WebSockets, design patterns, SOLID principles, data structures, Git, system design, security, and more — the topics every interviewer asks about. **Track your progress** Earn XP, level up from Junior Dev to Principal Dev, maintain your daily streak, and unlock achievements. See exactly where you stand on every topic. **100% free. No ads. No paywalls.** Every lesson, every exercise, every question — completely unlocked from day one. No subscriptions. No in-app purchases. No ads. Built by a developer, for developers. **Works offline** No internet? No problem. All content is available offline so you can practice on the subway, on a plane, or anywhere. Download InterviewOS and start preparing for the job you deserve.

Mockpit turns iOS and Swift interview prep into a daily habit that sticks. Practice with spaced-repetition flashcards, rehearse real mock interviews, solve Swift coding puzzles, and study a deep iOS knowledge base — all in one app built for developers getting ready for their next technical interview. Spaced-repetition flashcards 545 interview questions with concise answers, scheduled by a proven review algorithm so each card comes back right before you'd forget it. Rate how well you knew it and Mockpit plans the next review — undo a misgrade in one tap, and flag anything you didn't get for a focused "to review" queue. iOS knowledge base 120+ in-depth notes covering Swift Concurrency, SwiftUI, app architecture, multithreading, UIKit, the iOS SDK, testing and more. Notes link to each other, render code in monospace, and are searchable by title and text — read to understand, not just memorize. Mock interviews Practice by section — recruiter screen, Swift fundamentals, system design, algorithms and behavioral — for the companies you're actually interviewing with. Run a timed set of questions and review what you missed with links back to the relevant notes. Coding puzzles and a live sandbox Sharpen the parts real interviews test: "what prints?" output puzzles, memory-leak spotting and concurrency challenges. Write and run Swift in a built-in sandbox to check your reasoning on the spot. Interview tracker Add the companies you're pursuing, track every round from the recruiter call to the onsite, and get a reminder before each interview so nothing slips. Progress that keeps you going Build a daily streak, watch topics move toward mastery, see your weak areas by section, and unlock personal milestones as you go. Free & Pro Train with flashcards and preview the knowledge base for free. Mockpit Pro unlocks the full knowledge base, mock interviews, coding puzzles, the Swift sandbox and multi-language content. Start with a free 3-day trial. — Subscription details — Mockpit Pro is offered Monthly auto-renewable subscription includes a 3-day free trial. • Payment is charged to your Apple ID at confirmation of purchase. • A subscription renews automatically unless canceled at least 24 hours before the end of the current period. • Manage or cancel anytime in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/