# Codex4 vs SPRK Mentorship

The clearest difference is in-app purchases: SPRK Mentorship at none against Codex4's 4. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Codex4 sells 4 in-app purchases, starting at $12.99 per month. SPRK Mentorship asks for nothing beyond the download.

Codex4 ships an update every 4 days, SPRK Mentorship every 5 days. The most recent releases landed on October 4, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Codex4 | SPRK Mentorship |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/codex4-for-serious-study/id6743228019/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 5 days |
| Monetization | Freemium | — |
| Size | 52 MB | 62 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Jonas Richner](https://appshunter.io/developer/1801973188) | [com.sprknew.app](https://appshunter.io/developer/1846679277) |

## What reviewers say

### 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 |


### SPRK Mentorship

[App page](https://appshunter.io/ios/app/sprk-mentorship/id6754624766)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Codex4 free?

Codex4 is free to download, with in-app purchases available.

### Is SPRK Mentorship free?

SPRK Mentorship is free to download, with no in-app purchases.

### Do Codex4 or SPRK Mentorship have ads?

Neither Codex4 nor SPRK Mentorship shows ads.

### Which is updated more often, Codex4 or SPRK Mentorship?

Codex4 ships an update every 4 days, and SPRK Mentorship every 5 days. Most recently, Codex4 was updated on October 4, 2026 and SPRK Mentorship on September 19, 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.*