# Hata Defteri vs Octo AI

The clearest difference is update cadence: Octo AI at every 4 days against Hata Defteri's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Hata Defteri sells 2 in-app purchases, starting at $1.99 per month and Octo AI sells 2 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Hata Defteri ships an update every 3 weeks, Octo AI every 4 days. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Hata Defteri | Octo AI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Size | 43 MB | 58 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Cagatay EMEKCI](https://appshunter.io/developer/1889162934) | [CENGIZHAN ERTURAN](https://appshunter.io/developer/6803370468) |

## What reviewers say

### Hata Defteri

[App page](https://appshunter.io/ios/app/hata-defteri/id6775034765)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Aylık Pro Plan | $1.99 | per month |
| 1 Yıllık Pro Plan | $19.99 | per year |


### Octo AI

[App page](https://appshunter.io/ios/app/octo-ai-video-problem-solver/id6803370466)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Octo AI Pro - Weekly | $4.99 | per 7 days |
| Octo AI Pro - Monthly | $12.99 | per month |


## Frequently asked questions

### Is Hata Defteri free?

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

### Is Octo AI free?

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

### Do Hata Defteri or Octo AI have ads?

Neither Hata Defteri nor Octo AI shows ads.

### Which is updated more often, Hata Defteri or Octo AI?

Hata Defteri ships an update every 3 weeks, and Octo AI every 4 days. Most recently, Hata Defteri was updated on October 24, 2026 and Octo AI on October 19, 2026.

---

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