# 协同签名 vs PDF在线版

The clearest difference is rating: PDF在线版 at 3.5 against 协同签名's 2.3. PDF在线版 also leads on iOS requirement (11.0 vs 13). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PDF在线版 holds the better App Store score, 3.5 against 2.3. Both are backed by a comparable volume of ratings — 3 and 2 respectively.

协同签名 ships an update every 5 weeks, PDF在线版 monthly. The most recent releases landed on October 14, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | 协同签名 | PDF在线版 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (3 ratings)](https://appshunter.io/ios/app/id1470035601/reviews) | **[3.5 (2 ratings)](https://appshunter.io/ios/app/pdf/id1622254371/reviews)** |
| Number of ratings | **3** | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Monthly** |
| Monetization | — | Free |
| Size | 62 MB | 25 MB |
| Requires iOS | 13 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Beijing Certificate Authority Co., Ltd.](https://appshunter.io/developer/1074200787) | [Tianjin Jinruan Tianxia Technology Co., Ltd.](https://appshunter.io/developer/1619559631) |

## What reviewers say

### 协同签名

[App page](https://appshunter.io/ios/app/id1470035601)

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

**In-app purchases:** none


### PDF在线版

[App page](https://appshunter.io/ios/app/pdf/id1622254371)

This app serves as a reader for documents encrypted using an online solution. It requires a username and password to open protected files and automatically binds to the device used for the first reading. Administrators can manage user reading permissions.

**Highlights:** Online encryption reader, Username and password protection, Device binding, User permission control, Secure document access

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 协同签名 free?

协同签名 is free to download, with no in-app purchases.

### Is PDF在线版 free?

PDF在线版 is free to download, with no in-app purchases.

### Which has better reviews, 协同签名 or PDF在线版?

PDF在线版 is rated higher. 协同签名 averages 2.3 out of 5 from 3 ratings, while PDF在线版 averages 3.5 from 2 ratings.

### Do 协同签名 or PDF在线版 have ads?

Neither 协同签名 nor PDF在线版 shows ads.

### Which is updated more often, 协同签名 or PDF在线版?

协同签名 ships an update every 5 weeks, and PDF在线版 monthly. Most recently, 协同签名 was updated on October 14, 2026 and PDF在线版 on October 13, 2026.

---

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