# 私信 vs MosApp

The clearest difference is review sentiment: 私信 at 100% against MosApp's 50%. 私信 also leads on in-app purchases (none vs 6) and rating (5.0 vs 4.7). MosApp's advantage is ratings volume (3 vs 1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. MosApp sells 6 in-app purchases, starting at $2.49 per month. 私信 asks for nothing beyond the download.

私信 holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews point the same way: 100% of 私信's written reviews are positive against 50% of MosApp's.

私信 ships an update every 3 weeks, MosApp fortnightly. The most recent releases landed on September 26, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | 私信 | MosApp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sechat/id1378942732/reviews)** | [4.7 (3 ratings)](https://appshunter.io/ios/app/mosapp/id6446265600/reviews) |
| Number of ratings | 1 | **3** |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 17 MB | 268 MB |
| Requires iOS | **13.0** | 15.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [香港鳳凰互聯網科技有限公司](https://appshunter.io/developer/1238227716) | [HIGHLANDER TECHNOLOGIES PTE.LTD.](https://appshunter.io/developer/1677054831) |

## What reviewers say

### 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


### MosApp

[App page](https://appshunter.io/ios/app/mosapp/id6446265600)

This app offers secure, end-to-end encrypted messaging and calls with advanced features like disappearing messages, auto-translation, and AI assistants. It also integrates mini-programs for payments, bookings, and more, all within a customizable interface.

**Highlights:** End-to-end encrypted chats and calls, Disappearing messages and two-way deletion, Large group chats and public channels, In-chat auto-translation, AI agent and customer service, Integrated mini-programs for payments and bookings, App lock with biometrics

**Features:** Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium auto renewal monthly | $2.49 | per month |
| Premium auto renewal quarterly | $5.99 | per 3 months |
| Premium auto renewal yearly | $19.99 | per year |
| MosApp Premium per month | $2.99 | one-time |
| MosApp Premium per quarter | $7.99 | one-time |
| MosApp Premium per year | $24.99 | one-time |


## Frequently asked questions

### Is 私信 free?

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

### Is MosApp free?

MosApp is free to download, with in-app purchases available.

### Which has better reviews, 私信 or MosApp?

私信 is rated higher. 私信 averages 5.0 out of 5 from 1 ratings, while MosApp averages 4.7 from 3 ratings.

### Do 私信 or MosApp have ads?

Neither 私信 nor MosApp shows ads.

### Which is updated more often, 私信 or MosApp?

私信 ships an update every 3 weeks, and MosApp fortnightly. Most recently, 私信 was updated on September 26, 2026 and MosApp on October 6, 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.*