DailyBits vs CodeStudy

매일 5문제, 개발 지식을 쌓아가는 개발자 퀴즈 앱 DailyBits는 바쁜 개발자를 위한 일일 퀴즈 앱입니다. 하루 5분, 5문제로 CS 기초와 개발 지식을 꾸준히 다져보세요. ■ 10개 카테고리, 1000문제 • CS 기초: 자료구조, 알고리즘, OS, 네트워크, DB • 개발 직군: Android, iOS, Web, Spring, Backend • 카테고리별 100문제, 총 1,000문제 수록 ■ 나만의 학습 트랙 • 관심 있는 카테고리를 골라 구독 • 카테고리별 독립적인 진도, 스트릭, 통계 • 내가 원하는 분야만 집중 학습 ■ 스트릭(연속 기록) 시스템 • 카테고리마다 연속 기록을 쌓아보세요 • 놓치면 처음부터! 긴장감 있는 도전 ■ GitHub 스타일 캘린더 • 카테고리별 학습 기록을 한눈에 확인 • 잔디 심듯 꾸준히 채워가는 재미 ■ 뱃지 & 통계 • 100일, 200일, 300일, 365일 달성 뱃지 • 카테고리별 정답률과 총 문제 수 통계 제공 ■ 완전 오프라인 • 인터넷 없이도 언제 어디서나 • 출퇴근길, 잠들기 전 가볍게 풀기 딱! 개발자의 CS 기초 체력과 직군 역량을 키워주는 DailyBits, 오늘부터 시작해보세요!

ChatGPT gives you answers and you forget them an hour later. Tutorials are fun until you can't recall a thing. CodeStudy makes you make the answer — and remember it. CodeStudy is an AI coding tutor that teaches with the Socratic method. Instead of dumping code on you, it asks the right questions until you figure it out yourself. The "aha" moment is yours, not the AI's. That's why it sticks. Pick your track: • Swift / iOS — for app developers • Spring / Kotlin — for backend developers Both tracks ship with 50 hand-crafted concepts and the same Socratic dialogue engine. Switch tracks anytime in Settings. — How it works — You pick one concept (Optionals, SwiftUI State, Kotlin null safety, JPA transactions…) and have a real conversation with the tutor. It probes your understanding, gives analogies, asks you to predict what code does. When you've actually got it, it marks the concept "Mastered" — and only then. No multiple-choice. No copy-paste. No "great job!" filler. Just genuine back-and-forth until the idea clicks. — What's in each track — Swift / iOS (50 concepts) Variables, Optionals, Closures, Protocols, Generics, async/await, SwiftUI state, Concurrency, Macros, and more. Spring / Kotlin (50 concepts) val/var, null safety, data classes, Coroutines, Spring Boot DI, JPA, transactions, REST design, large-scale system patterns, and more. — Features — • 100+ concepts across two tracks (50 per track) • Daily learning rhythm with streaks • Streak Shield — skip a day, your streak survives • Track-scoped study history — revisit any mastered concept and replay your conversations • Mastery tracking that actually means something (not "you saw it once") • Localized for Korean and English • Anonymous by default — no account, no email, just learn • Open privacy practices — see PRIVACY.md in our repo — Who is it for? — iOS developers learning Swift seriously. Backend developers working with Spring/Kotlin. Bootcamp graduates filling conceptual gaps. Self-taught coders who keep getting stuck on the same things. Anyone tired of tutorials they forget by next week. — What's not in CodeStudy — No trackers. No analytics SDKs. No ads. No upselling. Just the tutor. — Built by — A solo developer who got frustrated with how today's coding tools optimize for the wrong thing (giving answers fast). CodeStudy optimizes for what actually matters: long-term retention. Try it. Pick a track. Master your first concept in 5 minutes. The dialogue is the lesson.