# YINID vs 盖章

The clearest difference is in-app purchases: YINID at none against 盖章's 2. YINID also leads on iOS requirement (12.0 vs 15.0). 盖章's advantage is update cadence (weekly vs every 5 weeks). On price, ads and device support there is nothing between them.

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

YINID ships an update every 5 weeks, 盖章 weekly. The most recent releases landed on October 16, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | YINID | 盖章 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 58 MB | 7 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [鉴 刘](https://appshunter.io/developer/1420089432) | [Hangzhou Niufen Network Technology Co., Ltd.](https://appshunter.io/developer/1896746554) |

## What reviewers say

### YINID

[App page](https://appshunter.io/ios/app/yinid/id6477161888)

**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 YINID free?

YINID 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 YINID or 盖章 have ads?

Neither YINID nor 盖章 shows ads.

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

YINID ships an update every 5 weeks, and 盖章 weekly. Most recently, YINID was updated on October 16, 2026 and 盖章 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.*