Comparison

Todaii vs Codex4

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

Head to head
About

Todaii

Master German from A1 to C1 with this comprehensive app. It offers AI-powered reading and speaking practice, listening exercises with transcripts, a vast vocabulary builder, an integrated dictionary, and Goethe exam preparation.

Highlights
  • AI-powered speaking practice
  • Reading comprehension with lookup
  • Listening practice with transcripts
  • Vocabulary builder and games
  • Integrated German dictionary
  • Goethe A1-C1 mock tests
Features
Read full description

Learn German faster with real German reading content, an AI conversation partner, and Goethe & Telc mock tests - all built around the CEFR levels from A1 to C1. Todaii German turns everyday German content into bite-sized lessons you can finish in just 10 minutes a day. Read smarter, speak with confidence, and walk into your exam ready. WHY Todaii German? • Our language experts create German reading content from A1 to C1 levels, with one-tap lookup and a quiz built right into every reading lesson. • Todaii is your companion for reading, listening, AI speaking practice, vocabulary flashcards, and full Goethe & Telc exam prep — all in one app. Start learning German in a new way with Todaii. ====== WHAT LEVELS CAN I LEARN? You can learn German from A1 (absolute beginner) through A2, B1, B2 up to C1 (advanced), with reading content, listening material, and exam prep matched to each CEFR level. ====== Why learning with real Deutsch content works: ► REAL GERMAN READING, NOT TEXTBOOK DRILLS Articles curated by level — A1 through C1 — across culture, technology, business, and everyday German life. Tap any word for instant lookup with meaning, native audio, and example sentences. A short reading quiz at the end locks the new vocabulary in. ► GOETHE & TELC EXAM PREP Full mock tests from A1 through C1, with detailed answer explanations so you understand why — not just what. Walk into the real Goethe or Telc exam knowing exactly what to expect. ► SPEAK GERMAN 1:1 WITH AN AI TUTOR Hold real conversations in German on topics you'd actually talk about. Get instant feedback on grammar and pronunciation, suggestions for better phrasing, and a score you can track over time. It's the kind of speaking practice a textbook can't give you. ► TRAIN YOUR LISTENING WITH NATIVE AUDIO Every article comes with high-quality native German audio. Trending podcasts and videos include full transcripts, with playback speed you can adjust to match your listening level — slow it down to catch every word, speed it up as your ear improves. ► VOCABULARY THAT STICKS General word lists for everyday Deutsch, plus specialist vocabulary sets for nursing, hospitality, retail, and customer service. Flashcards, matching games, and sentence-building exercises move new words into long-term memory. ► INSTANT GERMAN DICTIONARY AI-assisted lookup for words, phrases, and grammar. See real example sentences and visual cues that make new German vocabulary easier to remember and easier to use in real conversations. ====== WHO IT'S FOR • Self-learners working toward A1, B1, or C1 fluency • Students preparing for Goethe or Telc certification • Anyone who wants to read, listen, and speak German — not just memorize • Busy learners with ten minutes a day and a real goal Start small. Stay consistent. Todaii is the German learning companion you'll come back to. Questions or feedback? Reach us at todai.easylife@gmail.com — your input drives every update. Privacy: https://todaiinews.com/en/policy Terms: https://todaiinews.com/en/terms

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

Todaii4 screens
Codex44 screens

Verdict

The call

The clearest difference is review sentiment: Todaii at 88% against Codex4's 50%. Todaii also leads on ratings volume (91 vs 2). Codex4's advantage is ads (none vs shown) and update cadence (every 4 days vs fortnightly). On price, in-app purchases, monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Todaii sells 19 in-app purchases, starting at $5.39 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: Todaii has 91 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 88% of Todaii'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

Todaii ships an update fortnightly, Codex4 every 4 days. The most recent releases landed on October 19, 2026 and October 21, 2026 respectively.

Scorecard5 real differences · 5 level
Todaii versus Codex4: the parameters behind the verdict, then further details
ParameterTodaiiCodex4
PriceFreeFree
Rating4.8 (91 ratings)5.0 (2 ratings) — better
Positive reviews87.8% of reviews — better50.0% of reviews
Number of ratings91 — better2
Update frequencyFortnightlyEvery 4 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15 — better15.6
Further details — not scored
Size224 MB52 MB
Age rating4+4+
DeveloperGhi NguyenJonas Richner

Customer experience

Todaii

All ratings91 ratings
Positive94.5%
Neutral1.1%
Negative4.4%
Written reviews74 reviews
Positive87.8%
Neutral1.4%
Negative10.8%

Codex4

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

In-app purchases

19 purchases

Todaii

Subscriptions15
  • Discovery version: 1 month$5.391 Month
  • Discovery version: 1 month$6.291 Month
  • Discovery version: 1 month$7.491 Month
Show 12 more
  • Discovery version: 1 month$8.991 Month
  • Basic version: 3 months$13.493 Months
  • AI Basic Version$15.991 Month
  • Basic version: 3 months$16.003 Months
  • Basic version: 3 months$18.903 Months
  • Standard version: 1 year$22.001 Year
  • Standard version: 1 year$26.491 Year
  • Basic version: 3 months$26.993 Months
  • Standard version: 1 year$30.901 Year
  • Standard version: 1 year$43.991 Year
  • AI Pro Version$50.001 Year
  • AI Pro Version$69.991 Year
One-time4
  • Premium version$44.49
  • Premium version$62.00
  • Plus version$80.00
Show 1 more
  • Premium version$89.00
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 Todaii free?
Todaii 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, Todaii or Codex4?
Codex4 is rated higher. Todaii averages 4.8 out of 5 from 91 ratings, while Codex4 averages 5.0 from 2 ratings.
Do Todaii or Codex4 have ads?
Todaii shows ads; Codex4 does not.
Which is updated more often, Todaii or Codex4?
Todaii ships an update fortnightly, and Codex4 every 4 days. Most recently, Todaii was updated on October 19, 2026 and Codex4 on October 21, 2026.

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