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About LeetO(n)
LeetO(n) was an education app developed by Joshua Kim. It was removed from the App Store Sep 2, 2026.
User Ratings
LeetO(n) was rated 3.75 out of 5 stars, based on 8 ratings.
App Information
LeetO(n) was free to download. The download size was 1.62 MB. The last available version was 1.1. The last update was on August 14, 2025.
Technical Requirements
The app had a content rating of Everyone. The app had been available on the App Store since August 2025.
Description
Stop grinding, start understanding! Ace your next technical interview with LeetO(n), the smartest way to practice LeetCode-style problems on the go.
Whether you're in line for coffee or on your daily commute, turn your downtime into productive prep time. We've distilled essential coding problems into a few effective learning formats:
Flashcard Mode: Refresh your memory on key problem insights. Each card presents a problem and lets you flip to reveal the optimal solution and key takeaways. Perfect for quick review sessions.
Guidance Mode: Don't just memorize solutions—master them. This mode asks you a series of guided questions to help you deconstruct each problem and build the core logic yourself.
Recap Mode: Test your understanding, don't just memorize. We challenge you to identify the correct approach, time complexity, or code snippet for a given problem.
Features:
Curated Problem Sets: Study by topic! We’ve organized hundreds of problems covering everything from Arrays and Strings to Trees, Graphs, and Dynamic Programming.
Track Your Progress: See your strengths and weaknesses at a glance. Our stats help you focus your efforts on the topics that need the most work.
Favorites: Bookmark tough problems to easily revisit them later.
Each subscription will automatically renew 3 days before the expiration date for
the same time period. Subscriptions can be cancelled at any time before the renewal.
