iTer - IT learning

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

2. 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

3. 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

4. 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.

5. 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

6. 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

7. 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

8. 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

9. 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

10. 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

11. 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.