DevPrep vs Dalgi
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DevPrep
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Ace your iOS developer interview and keep your skills sharp. Hundreds of questions and hands-on coding tasks across 21 topics — the base is updated regularly: Swift, SwiftUI, Swift Concurrency (async/await, actors), Combine, memory & ARC, multithreading & GCD, UIKit, Auto Layout, architecture (MVVM, VIPER, Clean), Objective-C, algorithms & data structures, networking, testing and soft skills. WHAT'S INSIDE • Apple-docs-style answers with syntax-highlighted code • Hands-on coding tasks with full solutions: “predict the output”, “find the bug”, “implement it” • Junior / Middle / Senior and Legacy / Modern level tags — study exactly what you need • Progress tracking, a “learned” marker, a daily streak and goal • A spaced-repetition flashcard trainer and a “Hard” deck • Built-in search and an in-app reader for external materials • Light and dark themes • Full Russian & English — switch on the fly • Works offline We continuously update and expand the library of questions and tasks — new content arrives without an app update. Basic topics are free. Full access to all questions, tasks and materials unlocks with a subscription. SUBSCRIPTION Payment is charged to your Apple ID at confirmation of purchase. It auto-renews unless auto-renew is turned off at least 24 hours before the end of the current period. Manage your subscription in your Apple ID settings. Terms of use and the privacy policy are available in the app.
Dalgi
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Learn Korean from zero to advanced with Dalgi — the structured Korean learning app for beginners and beyond. Master Hangul alphabet, Korean vocabulary, grammar patterns, reading comprehension, flashcards, and quizzes — all in one app. - LEARN THE HANGUL ALPHABET - Start with the Korean alphabet the right way. Practice all 14 consonants and 10 vowels with handwriting exercises, ghost-letter tracing, and pronunciation guides. Build a strong Hangul foundation before moving to words and sentences. - STRUCTURED KOREAN COURSES - Progress through 4 proficiency levels — Beginner, Elementary, Intermediate, and Advanced — each split into A and B terms (1A, 1B, 2A, 2B, 3A, 3B, 4A, 4B). Every level is organized into units with clear, measurable goals. Switch levels anytime. - KOREAN VOCABULARY WITH AUDIO - Learn hundreds of Korean words with native-speaker audio pronunciation, romanization, part-of-speech tags (noun, verb, adjective), English meanings, and real example sentences. Track every word as New, Learning, or Mastered. - GRAMMAR MADE SIMPLE - Understand Korean grammar structure with clear pattern formulas, explanations, and multiple Korean-English example sentences per grammar point. Perfect for TOPIK exam preparation and real-world Korean usage. - SPACED REPETITION FLASHCARDS - Reinforce vocabulary with smart flashcard sessions using spaced repetition. Choose Korean → English or English → Korean mode. Cards cycle through New, Learning, and Mastered piles — requiring 3 consecutive correct answers to master a word. - VOCABULARY & GRAMMAR QUIZZES - Test your knowledge with multiple-choice quizzes per unit. Includes listening comprehension questions with audio dialogues. Get instant scores, percentage feedback, and targeted "try again" options. - PROGRESS TRACKING - See exactly how far you've come. Track total vocabulary mastered, quizzes completed, and unit completion percentages on a clean progress dashboard. Each unit shows a live progress bar so you always know what's next. - WHY DALGI? - - Learn Korean alphabet (Hangul) with tracing practice - Structured CEFR-aligned course levels (A1 to B2+) - Audio pronunciation for every vocabulary word - Spaced repetition for long-term Korean vocabulary retention - Korean grammar explanations with pattern formulas - Reading comprehension with tap-to-translate - TOPIK-style multiple choice quizzes - Offline-friendly progress tracking - Clean dark and light theme support - No forced accounts - start learning immediately Whether you're learning Korean for travel, K-drama, K-pop, TOPIK, or moving to Korea - Dalgi gives you a clear, structured path from Hangul basics to conversational Korean. Start learning Korean today. Download Dalgi free. ------- Developer contact: studiocaesium@gmail.com Privacy Policy: https://www.caesiumstudio.com/privacy-policy End User License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula
Screenshots
Verdict
The clearest difference is ads: DevPrep at none against Dalgi's shown. DevPrep also leads on update cadence (every 9 days vs every 3 months) and device support (4 vs 2). Dalgi's advantage is iOS requirement (15.0 vs 17.0). On price and in-app purchases 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. DevPrep sells 1 in-app purchase, starting at $2.99 per 6 months and Dalgi sells 3 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.
DevPrep ships an update every 9 days, Dalgi every 3 months. The most recent releases landed on September 17, 2026 and September 26, 2026 respectively.
| Parameter | DevPrep | Dalgi |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 9 days — better | Every 3 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPod |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 28 MB | 69 MB |
| Age rating | 4+ | 4+ |
| Developer | Aliaksei Yelin | Ravi Kumar Sharma |
In-app purchases
DevPrep
- Get full access3 Days trial$2.996 Months
Dalgi
- Weekly subscription$3.997 Days
- Monthly subscription$6.991 Month
- Yearly subscription$17.991 Year









