# Todaii vs Codex4

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.

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.

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.

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

## The numbers

| Metric | Todaii | Codex4 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (91 ratings)](https://appshunter.io/ios/app/todaii-learn-german-a1-c1/id6443652990/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/codex4-for-serious-study/id6743228019/reviews)** |
| Number of ratings | **91** | 2 |
| Positive reviews | **88.2% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 4 days** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 224 MB | 52 MB |
| Requires iOS | **15** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ghi Nguyen](https://appshunter.io/developer/933081416) | [Jonas Richner](https://appshunter.io/developer/1801973188) |

## What reviewers say

### Todaii

[App page](https://appshunter.io/ios/app/todaii-learn-german-a1-c1/id6443652990)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (19)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Discovery version: 1 month | $5.39 | per month |
| Discovery version: 1 month | $6.29 | per month |
| Discovery version: 1 month | $7.49 | per month |
| Discovery version: 1 month | $8.99 | per month |
| Basic version: 3 months | $13.49 | per 3 months |
| AI Basic Version | $15.99 | per month |
| Basic version: 3 months | $16.00 | per 3 months |
| Basic version: 3 months | $18.90 | per 3 months |
| Standard version: 1 year | $22.00 | per year |
| Standard version: 1 year | $26.49 | per year |
| Basic version: 3 months | $26.99 | per 3 months |
| Standard version: 1 year | $30.90 | per year |
| Standard version: 1 year | $43.99 | per year |
| AI Pro Version | $50.00 | per year |
| AI Pro Version | $69.99 | per year |
| Premium version | $44.49 | one-time |
| Premium version | $62.00 | one-time |
| Plus version | $80.00 | one-time |
| Premium version | $89.00 | one-time |


### Codex4

[App page](https://appshunter.io/ios/app/codex4-for-serious-study/id6743228019)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic | $12.99 | per month |
| Pro | $14.00 | per month |
| Basic Yearly | $69.99 | per year |
| Pro Yearly | $85.00 | per year |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*