# ZeroDay Dev vs AI Engineer Quiz

The clearest difference is iOS requirement: AI Engineer Quiz at 15.1 against ZeroDay Dev's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. ZeroDay Dev sells 1 one-off in-app purchase and AI Engineer Quiz sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ZeroDay Dev ships an update weekly, AI Engineer Quiz fortnightly. The most recent releases landed on September 18, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | ZeroDay Dev | AI Engineer Quiz |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/zeroday-dev/id6760129673/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Fortnightly |
| Monetization | Free | — |
| Size | 69 MB | 18 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [John Lawniczak](https://appshunter.io/developer/1882793043) | [Kohei Omori](https://appshunter.io/developer/1886931034) |

## What reviewers say

### ZeroDay Dev

[App page](https://appshunter.io/ios/app/zeroday-dev/id6760129673)

Learn secure coding and blockchain security through hands-on challenges and real-world exploit analysis. Practice building exploit intuition with interactive exercises and track your progress through curated learning paths. The app is designed for offline use, allowing you to learn anytime, anywhere.

**Highlights:** Hands-on coding challenges, Real-world exploit analysis, Interactive practice exercises, Curated learning tracks, Progress tracking and gamification, Offline-first functionality

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Content | $4.99 | one-time |


### AI Engineer Quiz

[App page](https://appshunter.io/ios/app/ai-engineer-quiz/id6770689652)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Access | $5.99 | one-time |


## Frequently asked questions

### Is ZeroDay Dev free?

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

### Is AI Engineer Quiz free?

AI Engineer Quiz is free to download, with in-app purchases available.

### Do ZeroDay Dev or AI Engineer Quiz have ads?

Neither ZeroDay Dev nor AI Engineer Quiz shows ads.

### Which is updated more often, ZeroDay Dev or AI Engineer Quiz?

ZeroDay Dev ships an update weekly, and AI Engineer Quiz fortnightly. Most recently, ZeroDay Dev was updated on September 18, 2026 and AI Engineer Quiz on September 8, 2026.

---

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