Learn Coding - Off By One
教育
僅適用於 iPhone
免費 · App 內購買 · 專為 iPhone 設計。尚未針對 macOS 驗證。
iPhone
Land your next tech job. Off By One turns learning to code and coding interview prep into a five-minute daily habit.
Real interview problems, taught the way you actually learn: step by step, with animated visualizations, guided code building, and complexity quizzes. You watch the algorithm move, then you build it yourself, then you prove you understand why it works. No copy-pasting into a judge, no walls of text.
WHAT'S INSIDE
• 64 guided lessons across 14 topics: arrays and hashing, two pointers, sliding window, stacks, binary search, linked lists, trees, tries, heaps, backtracking, graphs, dynamic programming, greedy algorithms, and intervals
• Every lesson in Python, Java, and JavaScript, each written for that language by hand, never transliterated: the JavaScript version asks JavaScript questions, the Java version asks Java questions
• Animated, step-by-step visualizations that show how each algorithm actually works: pointers travel, windows slide, trees traverse
• Big-O time and space quizzes on every problem, so you can explain the "why" in the room, not just recite the code
• 20 system design stories covering caching, load balancing, sharding, CDNs, rate limiting, database indexing, message queues, CAP, WebSockets, and more
• A beginner intro for every topic, so you can start from zero and still end up interview-ready
• Streaks, weekly progress charts, and an activity grid that keep you honest, five minutes at a time
HOW A LESSON WORKS
1. Understand the problem and the approach in plain language
2. Watch the algorithm run, one step at a time
3. Build the solution yourself with guided code steps
4. Answer for its time complexity
5. Answer for its space complexity
Finish a lesson and the next one is waiting: the curriculum is ordered so every topic builds on the one before it.
WHO IT'S FOR
• Complete beginners who want to learn to code with a clear goal
• CS students preparing for internship and new-grad interviews
• Self-taught developers filling the data structures and algorithms gap
• Working engineers brushing up before the next interview loop
START FREE
Every lesson and story opens free: read the problem, watch the first steps, get a feel for it. Premium unlocks full visualizations, code building, complexity training, and system design.
Off By One Premium is an auto-renewing subscription. Plans: annual with a 3-day free trial, monthly with a 3-day free trial, or weekly. Prices are shown in the app in your local currency. Payment is charged to your Apple ID account at purchase confirmation, or when the free trial ends. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel in your Apple ID settings. Unused trial time is forfeited on purchase.
Privacy Policy: https://www.ijustwantagoodjob.com/off-by-one/privacy-policy
Terms of Use: https://www.ijustwantagoodjob.com/off-by-one/terms-of-service
評分與評論
- 此App未收到足夠的評分或評論以顯示概況。
Meet your new study buddy!
The little face from the app icon now learns right alongside you. He watches you work, follows your finger, celebrates when you nail it and cheers you on when you need another try. Give him a tap on the Home screen and see what he does.
Story checkpoints now make sure each idea really lands before you move on, and we've polished plenty of little things so the whole app feels smoother and sharper.
Happy practicing!
開發者I JUST WANT LLC表明App的私隱慣例或包括下列資料的處理。詳情請參閲 開發者的私隱政策 。
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資料
- 供應商
- I JUST WANT LLC
- 大小
- 92.2 MB
- 類別
- 教育
- 相容性
須使用 iOS 15.1 或以上版本。
- iPhone
須使用 iOS 15.1 或以上版本。 - iPod touch
須使用 iOS 15.1 或以上版本。 - Mac
須使用 macOS 12.0 或以上版本及配備 Apple M1 或以上版本晶片的 Mac。 - Apple Vision
須使用 visionOS 1.0 或以上版本。
- iPhone
- 語言
德文及另外6種
- 德文、日文、法文、英文、葡萄牙文、西班牙文、韓文
- 年齡分級
4+
- 4+
- App 內購買
是
- Premium Monthly Subscription USD 2.49
- Premium Weekly USD 1.49
- Premium Annually (1 Year) USD 14.99
- Premium Monthly (1 Month) USD 4.99
- Premium Annually USD 10.99
- Premium Weekly USD 1.99
- 版權
- © 2026 I JUST WANT LLC