# Errly vs AI Tutor

The clearest difference is in-app purchases: AI Tutor at none against Errly's 10. AI Tutor also leads on update cadence (daily vs every 4 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Errly sells 10 in-app purchases, starting at $2.99 per month. AI Tutor asks for nothing beyond the download.

Errly ships an update every 4 days, AI Tutor daily. Both last shipped on November 6, 2026.

## The numbers

| Metric | Errly | AI Tutor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 4 days | **Daily** |
| Size | 167 MB | 75 MB |
| Requires iOS | 15.5 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [奎锋 张](https://appshunter.io/developer/1487627883) | [Manh Toan Nguyen](https://appshunter.io/developer/540761762) |

## What reviewers say

### Errly

[App page](https://appshunter.io/ios/app/errly-ai-tutor-and-error-book/id6794799247)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Errly Extra Storage 50 GB | $2.99 | per month |
| Errly Pro Weekly | $4.99 | per 7 days |
| Errly Pro Monthly (No Trial) | $9.99 | per month |
| Errly Ultra Monthly | $14.99 | per month |
| Errly Pro Yearly (No Trial) | $59.99 | per year |
| Errly Ultra Yearly | $119.99 | per year |
| Errly Advanced Export (1 Use) | $0.99 | one-time |
| Errly Forest Theme | $0.99 | one-time |
| Errly Midnight Blue Theme | $2.99 | one-time |
| Errly Advanced Export (Unlimited) | $4.99 | one-time |


### AI Tutor

[App page](https://appshunter.io/ios/app/ai-tutor-learn-better/id6809510023)

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

**In-app purchases:** none


## Frequently asked questions

### Is Errly free?

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

### Is AI Tutor free?

AI Tutor is free to download, with no in-app purchases.

### Do Errly or AI Tutor have ads?

Both Errly and AI Tutor show ads.

### Which is updated more often, Errly or AI Tutor?

Errly ships an update every 4 days, and AI Tutor daily. Most recently, Errly was updated on November 6, 2026 and AI Tutor on November 6, 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.*