iTer - IT learning

Ten years helping devs ace interviews. 10000+ offline questions, daily quizzes, widgets, and a new SwiftUI app on iPhone, iPad, and Mac. Study anywhere. Land your offer.

iTer is your offline interview question library for developers.

For ten years, iTer has helped programmers study smarter for job interviews. Version 10 is a full SwiftUI rebuild that brings 10,000+ curated questions, company exams, and practical study tools into one clean, fast, always-ready app. Whether you are preparing for campus recruiting, switching jobs, or refreshing fundamentals, iTer turns spare minutes into real progress.

1. Massive offline question bank

• 10,000+ interview questions, fully offline
• 16 language tracks: Objective-C, Swift, Java, C/C++, PHP, JavaScript, Python, SQL, C#, HTML5, Ruby, R, Linux, Big Data, Algorithms, Network Security
• 12 career paths: iOS, Java, Web, PHP, Python, Game, Database, Big Data, Linux, Algorithm, and Network Engineering
• 12 company exam collections from Google, Microsoft, Baidu, Tencent, Alibaba, JD, 360, NetEase, and more
• Multiple-choice and Q&A formats covering language basics, frameworks, algorithms, and common interview topics

1. Smart learning management

• Star important questions for quick review before interviews
• Recent history picks up where you left off
• Mastery labels: unlearned, learned, mastered
• Wrong-answer notebook collects mistakes from daily quizzes
• Learning stats summarize favorites, wrong answers, and mastery rate

1. Daily quiz habit builder

• Five multiple-choice questions every day, seeded by date
• Streak counter keeps you motivated
• Instant scoring with encouraging feedback
• Wrong-answer review shows your answer vs the correct one
• Retry today or reshuffle for extra practice

1. Powerful global search

• Search questions, answers, and knowledge keywords
• Filter by language or company exams
• Jump straight to question details from results -【iPad + keyboard】⌘F to search, ⌘1–⌘4 for tabs. In question detail (from a multi-question list): ← Previous, R Random, Space Show answer, → Next — faster review on iPad.

1. Categories and advanced learning

• Browse by career path or company exam papers
• Advanced learning links to LeetCode, Objc.io, NSHipster, Awesome lists, Gitbook tutorials, and practice projects
• External links open inside the app with in-app Safari

1. Home screen widgets

• Daily Question: one interview question on your home screen
• Quiz Glance: today score and streak
• Favorites Glance: track saved questions
• Wrong Book Glance: reminders for mistakes to review
• Widget background can follow your app theme

1. Home screen quick actions

• Long-press the app icon to pin up to 4 shortcuts
• Jump to search, daily quiz, favorites, wrong book, categories, feedback, or App Store review
• Deep links open the right screen instantly

1. Rich question detail experience

• Tap to reveal or hide answers for Q&A items
• Interactive multiple-choice practice before seeing explanations
• Toolbar actions for favorite, mastery, and share
• Copy question and answer text for notes
• Shuffle question order in lists
• Share cards render a long image with QR code for friends and teammates

1. 15 beautiful themes

• Presets including Gold, Ocean Blue, Forest Green, Rose Pink, and more
• Custom accent color support
• Light, dark, and system appearance
• List and grid layouts across language, category, and question screens

1. Native multi-platform experience

• iOS and iPadOS 16: full features including widgets and quick actions
• macOS 13: native Mac app with tabs, keyboard shortcuts, share cards, and tips

1. Settings and support

• Toggle favorites and recent sections on the Languages tab
• In-app feedback email to the developer
• Tip the developer to support ongoing updates
• About page with version info and open-source credits

Why iTer

• Ten years focused on developer interviews
• Offline-first study, anywhere anytime
• Questions, quizzes, wrong book, and widgets in one learning loop
• One purchase, works on iPhone, iPad, and Mac

Add iTer to your home screen or Dock. Five questions a day adds up to interview confidence.