# ERYA vs 小蓝书

The clearest difference is in-app purchases: ERYA at none against 小蓝书's 3. ERYA also leads on iOS requirement (11.0 vs 13.0). On price, ads and device support there is nothing between them.

Both are free to download. 小蓝书 sells 3 one-off in-app purchases. ERYA asks for nothing beyond the download.

## The numbers

| Metric | ERYA | 小蓝书 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Size | 75 MB | 30 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [杰军 张](https://appshunter.io/developer/1477600847) | [宗挺 罗](https://appshunter.io/developer/1655103859) |

## What reviewers say

### ERYA

[App page](https://appshunter.io/ios/app/erya/id1477600848)

**Features:** macOS Compatibility

**In-app purchases:** none


### 小蓝书

[App page](https://appshunter.io/ios/app/id6758568637)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 30天会员 | $1.99 | one-time |
| 90天会员 | $2.99 | one-time |
| 一年会员 | $5.99 | one-time |


## Frequently asked questions

### Is ERYA free?

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

### Is 小蓝书 free?

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

### Do ERYA or 小蓝书 have ads?

Neither ERYA nor 小蓝书 shows ads.

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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.*