Comparison

ІКstudieren vs Codex4

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ІКstudieren

Practice German with an AI tutor that offers personalized lessons, instant answers, and interactive exercises. Learn through a vast phrase library, engaging topics, and stress-free grammar modules. Improve pronunciation with native speaker audio.

Highlights
  • AI personal teacher
  • 5000+ phrases
  • 100 topics of sentences
  • Interactive grammar lessons
  • Native speaker pronunciation
  • Levels A1-C1
Features
Read full description

Artificial Intelligence — Your Personal Teacher: Imagine having a virtual tutor always ready to help! Communicate with our AI teacher in German, ask questions, and get instant answers. This intelligent assistant adapts to your learning style and progress, offering personalized exercises and recommendations. With it, you can practice speaking anytime and anywhere! Prototype Language Learning System: Using modern teaching methods, our app ensures fast learning at any age. The prototype system allows you to learn a language through active practice and interaction, making the learning process both effective and fun. You'll be engaged in learning with interactive tasks that stimulate your memory and creativity. 5000+ Phrases: Dive into a vast library of phrases covering all aspects of everyday life. From simple greetings to complex conversations — you'll always be ready to communicate! 100 Topics of Sentences and Questions: Learn the language through interesting topics! Each topic contains practical sentences and questions to help you express your thoughts confidently. Grammar Without Stress: Forget about boring rules! Our interactive grammar lessons make learning easy and clear. You'll quickly master the basics and be able to use them in practice. Words with Ukrainian Translations and Visualization: Each new word is accompanied by bright illustrations and Ukrainian translations. This not only makes memorization easier but also adds fun to the learning process! Pronunciation by Native Speakers: Listen to the correct pronunciation of words by native speakers! This will help you improve your listening and speaking skills. Levels from A1 to C1: Whether you're a beginner or already have basic knowledge, our app adapts to your level. You'll gradually move on to more complex constructions. With our app, you're not just learning words — you're unlocking a world of new possibilities! Join us and become part of an exciting journey into the world of the German language. Ready? Let's get started together!

About

Codex4

Build a usable vocabulary for your job, studies, or hobbies with smart, spaced repetition reviews. Master real word usage and track your progress with clear statistics. Designed for serious learners with a clean interface and no gimmicks.

Highlights
  • Add custom words from any text
  • Spaced repetition reviews (FSRS)
  • Master word lemmas and conjugations
  • Clear progress statistics
  • Automatic word extraction
  • Data export and offline access
Features
Read full description

Get fluent faster by learning the words you actually use. Codex4 helps you build a usable vocabulary and keep it for the long term. - Learn what you need: Add your own words from any text in one tap. Build vocabulary for your job, studies, or hobbies. - Retain more with less effort: Reviews are timed by FSRS (a modern spaced-repetition model) so you study exactly when it counts. - Master real usage: The app treats each word as a lemma, so forms and conjugations are covered naturally as you progress. - Stay organized and motivated: Clear stats show what’s due, what’s known, and what’s next. - Bring any content: Automatic word extraction and a context-aware lemmatizer handle homonyms and multi-word phrases. - Your data stays yours: Keep access to review even after unsubscribing, and export your words and learning data anytime. - No gimmicks: Fast sessions, clean design, built for serious learners. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

ІКstudieren4 screens
Codex44 screens

Verdict

The call

The clearest difference is update cadence: Codex4 at every 4 days against ІКstudieren's every 2 weeks. Codex4 also leads on rating (5.0 vs 4.8). ІКstudieren's advantage is ratings volume (28 vs 2) and review sentiment (63% vs 50%). On price, ads, in-app purchases and monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. ІКstudieren sells 4 in-app purchases, starting at $8.99 per month and Codex4 sells 4 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Codex4 holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: ІКstudieren has 28 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 63% of ІКstudieren's written reviews are positive against 50% of Codex4's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

ІКstudieren ships an update every 2 weeks, Codex4 every 4 days. The most recent releases landed on September 30, 2026 and September 17, 2026 respectively.

Scorecard4 real differences · 6 level
ІКstudieren versus Codex4: the parameters behind the verdict, then further details
ParameterІКstudierenCodex4
PriceFreeFree
Rating4.8 (28 ratings)5.0 (2 ratings) — better
Positive reviews63.0% of reviews — better50.0% of reviews
Number of ratings28 — better2
Update frequencyEvery 2 weeksEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPodiPhone, iPod
Requires iOS15.615.6
Further details — not scored
Size28 MB52 MB
Age rating4+4+
DeveloperIHOR VLADISLAVOVIC KOLESNYKOVJonas Richner

Customer experience

ІКstudieren

All ratings28 ratings
Positive96.4%
Neutral3.6%
Negative0.0%
Written reviews54 reviews
Positive63.0%
Neutral7.4%
Negative29.6%

Codex4

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

4 purchases

ІКstudieren

Subscriptions4
  • Starter Pass (1 month)3 Days trial$8.991 Month
  • Smart Learner (3 months)3 Days trial$12.993 Months
  • Pro Master (6 months)3 Days trial$24.996 Months
Show 1 more
  • Ultimate Fluency (12 months)7 Days trial$44.991 Year
4 purchases

Codex4

Subscriptions4
  • Basic$12.991 Month
  • Pro$14.001 Month
  • Basic Yearly7 Days trial$69.991 Year
Show 1 more
  • Pro Yearly3 Days trial$85.001 Year

Questions

Is ІКstudieren free?
ІКstudieren is free to download, with in-app purchases available.
Is Codex4 free?
Codex4 is free to download, with in-app purchases available.
Which has better reviews, ІКstudieren or Codex4?
Codex4 is rated higher. ІКstudieren averages 4.8 out of 5 from 28 ratings, while Codex4 averages 5.0 from 2 ratings.
Do ІКstudieren or Codex4 have ads?
Neither ІКstudieren nor Codex4 shows ads.
Which is updated more often, ІКstudieren or Codex4?
ІКstudieren ships an update every 2 weeks, and Codex4 every 4 days. Most recently, ІКstudieren was updated on September 30, 2026 and Codex4 on September 17, 2026.

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