100 Dev Mistakes vs 워러멜멍
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
100 Dev Mistakes
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Know the mistakes before you make them. 100 Dev Mistakes is a growth checklist that covers the 100 mistakes junior developers make most, so you can grow faster and stop repeating the same errors. The mistakes are organized into 10 categories: coding habits, debugging and problem solving, version control and collaboration, design and architecture, testing and quality, learning and growth, communication, infrastructure and deployment, security and privacy, and performance and optimization. Each one is explained in three parts: what happens, what to do, and what you learn from it. Check off the mistakes you have experienced, then answer the reflection questions for each one. With 400 questions in total, the reflection journal turns a quick read into real understanding. You can follow your progress by category and overall across all 100 mistakes, and bookmark anything you want to revisit. Your data syncs through iCloud (CloudKit) across iPhone, iPad, and Mac, so you can pick up wherever you left off. The app collects no personal information, and there are no analytics and no ads. Try the first 30 mistakes (3 categories) for free. Upgrade to PRO to unlock all 100. PRO is available as a monthly or yearly subscription, with the yearly plan saving up to 50% compared to monthly, or as a one-time lifetime purchase. Monthly and yearly subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. You can manage or cancel your subscription anytime in your Apple ID settings. Don't wait to learn it the hard way. Know the mistakes early, learn from them, and grow faster as a developer. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://m1zz.github.io/JuniorDevMistakes/en/privacy.html
워러멜멍
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워러멜멍은 수박씨를 빼며 잠깐 멍때리는 작은 휴식 앱입니다. 씨를 길게 누르고 천천히 움직이면 부드러운 소리와 진동이 함께 흘러갑니다. 매일의 기록은 귀여운 토핑으로 남고, 모인 토핑으로 나만의 화채를 만들 수 있어요. 복잡한 목표나 경쟁 없이, 오늘도 잠깐 멈춰 쉬어가고 싶은 순간에 사용해보세요.
Screenshots
Verdict
The clearest difference is in-app purchases: 워러멜멍 at none against 100 Dev Mistakes's 3. 워러멜멍 also leads on iOS requirement (18.0 vs 26.0). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. 100 Dev Mistakes sells 3 in-app purchases, starting at $2.99 per month. 워러멜멍 asks for nothing beyond the download.
| Parameter | 100 Dev Mistakes | 워러멜멍 |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 26.0 | 18.0 — better |
| Further details — not scored | ||
| Size | 13 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | hyunho lee | Jisoo KANG |
In-app purchases
100 Dev Mistakes
- 1달 구독$2.991 Month
- 1년 구독$14.991 Year
- 평생 구매$19.99
워러멜멍
No in-app purchases









