# ETC记录仪 vs 热门文库

The clearest difference is in-app purchases: ETC记录仪 at none against 热门文库's 3. ETC记录仪 also leads on iOS requirement (9.0 vs 15.6). 热门文库's advantage is update cadence (every 4 days vs weekly). On price, ads and device support there is nothing between them.

Both are free to download. 热门文库 sells 3 in-app purchases, starting at $0.99 per 7 days. ETC记录仪 asks for nothing beyond the download.

ETC记录仪 ships an update weekly, 热门文库 every 4 days. The most recent releases landed on October 12, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | ETC记录仪 | 热门文库 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 4 days** |
| Size | 36 MB | 8 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [军 江](https://appshunter.io/developer/1612759018) | [亚楠 武](https://appshunter.io/developer/1567713727) |

## What reviewers say

### ETC记录仪

[App page](https://appshunter.io/ios/app/etc/id1614199934)

**Features:** macOS Compatibility

**In-app purchases:** none


### 热门文库

[App page](https://appshunter.io/ios/app/id6749074141)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周会员 | $0.99 | per 7 days |
| 月会员 | $2.99 | per month |
| 年会员 | $6.99 | per year |


## Frequently asked questions

### Is ETC记录仪 free?

ETC记录仪 is free to download, with no in-app purchases.

### Is 热门文库 free?

热门文库 is free to download, with in-app purchases available.

### Do ETC记录仪 or 热门文库 have ads?

Neither ETC记录仪 nor 热门文库 shows ads.

### Which is updated more often, ETC记录仪 or 热门文库?

ETC记录仪 ships an update weekly, and 热门文库 every 4 days. Most recently, ETC记录仪 was updated on October 12, 2026 and 热门文库 on October 14, 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.*