# 安信通Pro vs 私信

The clearest difference is update cadence: 私信 at every 3 weeks against 安信通Pro's every 3 months. 安信通Pro's advantage is iOS requirement (11.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

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

安信通Pro ships an update every 3 months, 私信 every 3 weeks. The most recent releases landed on September 17, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | 安信通Pro | 私信 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sechat/id1378942732/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 106 MB | 17 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Hangzhou AKEY.ME Co., Ltd.](https://appshunter.io/developer/1048850291) | [香港鳳凰互聯網科技有限公司](https://appshunter.io/developer/1238227716) |

## What reviewers say

### 安信通Pro

[App page](https://appshunter.io/ios/app/pro/id1258112334)

**In-app purchases:** none


### 私信

[App page](https://appshunter.io/ios/app/sechat/id1378942732)

A secure instant messaging app built with end-to-end encryption for businesses and organizations. It offers standard chat features along with advanced data protection and clearing functions. A free version is available, with a paid enterprise option for enhanced services.

**Highlights:** End-to-end encryption, Text, emoji, voice, and image chat, Data protection and clearing, Group management, Instant announcements, Message recall and do not disturb

**In-app purchases:** none


## Frequently asked questions

### Is 安信通Pro free?

安信通Pro is free to download, with no in-app purchases.

### Is 私信 free?

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

### Do 安信通Pro or 私信 have ads?

Neither 安信通Pro nor 私信 shows ads.

### Which is updated more often, 安信通Pro or 私信?

安信通Pro ships an update every 3 months, and 私信 every 3 weeks. Most recently, 安信通Pro was updated on September 17, 2026 and 私信 on September 26, 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.*