# 秘塔AI搜索 vs OFD阅读器

The clearest difference is review sentiment: 秘塔AI搜索 at 59% against OFD阅读器's 0%. 秘塔AI搜索 also leads on ratings volume (30 vs 8). OFD阅读器's advantage is rating (4.8 vs 3.8) and iOS requirement (12.0 vs 14.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. 秘塔AI搜索 sells 13 one-off in-app purchases and OFD阅读器 sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

OFD阅读器 holds the better App Store score, 4.8 against 3.8. Both are backed by a comparable volume of ratings — 30 and 8 respectively. Written reviews complicate that: 59% of 秘塔AI搜索's written reviews are positive against 0% of OFD阅读器's, so the app with the better star average is not the one people write more warmly about.

秘塔AI搜索 ships an update every 10 days, OFD阅读器 fortnightly. The most recent releases landed on October 12, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | 秘塔AI搜索 | OFD阅读器 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (30 ratings)](https://appshunter.io/ios/app/ai/id6478196963/reviews) | **[4.8 (8 ratings)](https://appshunter.io/ios/app/ofd/id6480045092/reviews)** |
| Number of ratings | **30** | 8 |
| Positive reviews | **59.3% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Fortnightly |
| Monetization | Free with in-app purchases | Freemium |
| Size | 112 MB | 28 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [上海秘塔网络科技有限公司](https://appshunter.io/developer/1540052473) | [鑫昕 马](https://appshunter.io/developer/1715187540) |

## What reviewers say

### 秘塔AI搜索

[App page](https://appshunter.io/ios/app/ai/id6478196963)

This AI-powered search engine offers a clean, ad-free interface for finding information across the web, documents, and academic papers. It provides structured answers with citations, generates outlines and tables, and supports exporting results in various formats.

**Highlights:** Ad-free, pure search interface, Structured answers with citations, Automatic outline and table generation, Export results to Word, PDF, Deep semantic search for documents, Academic search with structured information, Configurable academic databases

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

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 知识库额度1000点 | $0.99 | one-time |
| 1000 H3 积分 | $1.99 | one-time |
| 1000积分 | $1.99 | one-time |
| 知识库额度10000点 | $4.99 | one-time |
| 秘塔AI搜索月度会员 | $5.99 | one-time |
| 10000 H3 积分 | $14.99 | one-time |
| 10000积分 | $17.99 | one-time |
| 秘塔AI搜索年度会员 | $29.99 | one-time |
| 100000 H3 积分 | $129.99 | one-time |
| 100000积分 | $179.99 | one-time |
| 知识库额度1000000点 | $399.99 | one-time |
| 500000 H3 积分 | $599.99 | one-time |
| 500000积分 | $799.99 | one-time |


### 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 秘塔AI搜索 free?

秘塔AI搜索 is free to download, with in-app purchases available.

### Is OFD阅读器 free?

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

### Which has better reviews, 秘塔AI搜索 or OFD阅读器?

OFD阅读器 is rated higher. 秘塔AI搜索 averages 3.8 out of 5 from 30 ratings, while OFD阅读器 averages 4.8 from 8 ratings.

### Do 秘塔AI搜索 or OFD阅读器 have ads?

Neither 秘塔AI搜索 nor OFD阅读器 shows ads.

### Which is updated more often, 秘塔AI搜索 or OFD阅读器?

秘塔AI搜索 ships an update every 10 days, and OFD阅读器 fortnightly. Most recently, 秘塔AI搜索 was updated on October 12, 2026 and OFD阅读器 on September 26, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*