# SNC vs 盖章

The clearest difference is in-app purchases: SNC at none against 盖章's 2. 盖章's advantage is device support (4 vs 2). On price, update cadence, ads and iOS requirement there is nothing between them.

Both are free to download. 盖章 sells 2 in-app purchases, starting at $2.99 per month. SNC asks for nothing beyond the download.

SNC ships an update every 6 days, 盖章 every 5 days. The most recent releases landed on September 17, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | SNC | 盖章 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 days | **Every 5 days** |
| Monetization | — | Free with in-app purchases |
| Size | 65 MB | 7 MB |
| Requires iOS | 15 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [深圳市联域光电股份有限公司](https://appshunter.io/developer/1650885456) | [Hangzhou Niufen Network Technology Co., Ltd.](https://appshunter.io/developer/1896746554) |

## What reviewers say

### SNC

[App page](https://appshunter.io/ios/app/snc-bluetooth/id6754228658)

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

**In-app purchases:** none


### 盖章

[App page](https://appshunter.io/ios/app/e-stamp/id6775122604)

Easily add stamps and handwritten electronic signatures to PDF documents. Process contracts and agreements efficiently without printing or scanning, keeping your data secure locally on your device.

**Highlights:** Smart PDF stamping, Across-page seal generation, Handwritten electronic signatures, Batch stamping and signing, Local data processing, Seamless document import/export

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| E‑Stamp Service | $2.99 | per month |
| 无纸盖章永久版 | $9.99 | one-time |


## Frequently asked questions

### Is SNC free?

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

### Is 盖章 free?

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

### Do SNC or 盖章 have ads?

Neither SNC nor 盖章 shows ads.

### Which is updated more often, SNC or 盖章?

SNC ships an update every 6 days, and 盖章 every 5 days. Most recently, SNC was updated on September 17, 2026 and 盖章 on September 28, 2026.

---

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