# Otterfile vs 文件预览助手

The clearest difference is in-app purchases: 文件预览助手 at none against Otterfile's 3. 文件预览助手 also leads on update cadence (every 2 weeks vs every 2 months) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Otterfile sells 3 in-app purchases, starting at $0.99 per month. 文件预览助手 asks for nothing beyond the download.

Otterfile ships an update every 2 months, 文件预览助手 every 2 weeks. The most recent releases landed on October 1, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Otterfile | 文件预览助手 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Size | 120 MB | 56 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [宁 权](https://appshunter.io/developer/1710975082) | [北京创效未来](https://appshunter.io/developer/1714229626) |

## What reviewers say

### Otterfile

[App page](https://appshunter.io/ios/app/otterfile/id6760924129)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Month Purchase | $0.99 | per month |
| Year Purchase | $6.99 | per year |
| Lifetime Prucahse | $9.99 | one-time |


### 文件预览助手

[App page](https://appshunter.io/ios/app/120-plus/id6761652430)

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

**In-app purchases:** none


## Frequently asked questions

### Is Otterfile free?

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

### Is 文件预览助手 free?

文件预览助手 is free to download, with no in-app purchases.

### Do Otterfile or 文件预览助手 have ads?

Neither Otterfile nor 文件预览助手 shows ads.

### Which is updated more often, Otterfile or 文件预览助手?

Otterfile ships an update every 2 months, and 文件预览助手 every 2 weeks. Most recently, Otterfile was updated on October 1, 2026 and 文件预览助手 on October 8, 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.*