# 小塘管 vs OFD阅读器

The clearest difference is in-app purchases: 小塘管 at none against OFD阅读器's 3. OFD阅读器's advantage is iOS requirement (12.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. OFD阅读器 sells 3 in-app purchases, starting at $3.99 per month. 小塘管 asks for nothing beyond the download.

小塘管 ships an update every 4 weeks, OFD阅读器 fortnightly. The most recent releases landed on October 25, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | 小塘管 | OFD阅读器 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (12 ratings)](https://appshunter.io/ios/app/ofd/id6480045092/reviews)** |
| Number of ratings | — | **12** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Fortnightly** |
| Monetization | — | Freemium |
| Size | 21 MB | 28 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [琪卿 罗](https://appshunter.io/developer/1509216807) | [鑫昕 马](https://appshunter.io/developer/1715187540) |

## What reviewers say

### 小塘管

[App page](https://appshunter.io/ios/app/id1589632727)

**Features:** macOS Compatibility

**In-app purchases:** none


### OFD阅读器

[App page](https://appshunter.io/ios/app/ofd/id6480045092)

This tool allows you to open and convert OFD and PDF documents. It supports converting OFD files to PDF, Word, or JPG images, as well as reading, printing, and sharing OFD documents.

**Highlights:** Open OFD and PDF documents, Convert OFD to PDF, Word, JPG, Read OFD files, Print OFD documents, Share OFD documents

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月会员 | $3.99 | per month |
| 年会员 | $9.99 | per year |
| 永久会员 | $14.99 | one-time |


## Frequently asked questions

### Is 小塘管 free?

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

### Is OFD阅读器 free?

OFD阅读器 is free to download, with in-app purchases available.

### Do 小塘管 or OFD阅读器 have ads?

Neither 小塘管 nor OFD阅读器 shows ads.

### Which is updated more often, 小塘管 or OFD阅读器?

小塘管 ships an update every 4 weeks, and OFD阅读器 fortnightly. Most recently, 小塘管 was updated on October 25, 2026 and OFD阅读器 on October 27, 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.*