# Coremail论客 vs PDF在线版

The clearest difference is rating: PDF在线版 at 3.5 against Coremail论客's 1.5. PDF在线版 also leads on iOS requirement (11.0 vs 13.0). Coremail论客's advantage is ratings volume (17 vs 2). On price, update cadence, ads and in-app purchases 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 1.5. That said, the two scores are not equally well evidenced: Coremail论客 has 17 ratings behind it against 2, so its average is the more settled of the two.

Coremail论客 ships an update every 6 weeks, PDF在线版 monthly. The most recent releases landed on October 8, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Coremail论客 | PDF在线版 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.5 (17 ratings)](https://appshunter.io/ios/app/coremail/id1070488070/reviews) | **[3.5 (2 ratings)](https://appshunter.io/ios/app/pdf/id1622254371/reviews)** |
| Number of ratings | **17** | 2 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Monthly** |
| Monetization | Free | Free |
| Size | 121 MB | 25 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mailtech Information Technology (Beijing) Co., Ltd.](https://appshunter.io/developer/696333665) | [Tianjin Jinruan Tianxia Technology Co., Ltd.](https://appshunter.io/developer/1619559631) |

## What reviewers say

### Coremail论客

[App page](https://appshunter.io/ios/app/coremail/id1070488070)

This is a team communication tool that integrates email and instant messaging for businesses. It enhances office communication efficiency with features like shared discussions, group chats, and secure data handling. Access your enterprise network drive and synchronize schedules directly within the app.

**Highlights:** Email integration, Instant messaging, Team collaboration, Enterprise network drive access, Schedule synchronization, Attachment preview, Caller ID

**Features:** Apple Watch app, 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 Coremail论客 free?

Coremail论客 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, Coremail论客 or PDF在线版?

PDF在线版 is rated higher. Coremail论客 averages 1.5 out of 5 from 17 ratings, while PDF在线版 averages 3.5 from 2 ratings.

### Do Coremail论客 or PDF在线版 have ads?

Neither Coremail论客 nor PDF在线版 shows ads.

### Which is updated more often, Coremail论客 or PDF在线版?

Coremail论客 ships an update every 6 weeks, and PDF在线版 monthly. Most recently, Coremail论客 was updated on October 8, 2026 and PDF在线版 on October 13, 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.*