# PDF快速盖章 vs FixCalc

The clearest difference is price: FixCalc at Free against PDF快速盖章's $4.99. FixCalc also leads on update cadence (weekly vs every 4 months) and device support (3 vs 1). PDF快速盖章's advantage is in-app purchases (none vs 1). On ads and iOS requirement there is nothing between them.

FixCalc is free to download; PDF快速盖章 costs $4.99 up front. FixCalc sells 1 one-off in-app purchase. PDF快速盖章 asks for nothing beyond the download.

PDF快速盖章 ships an update every 4 months, FixCalc weekly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | PDF快速盖章 | FixCalc |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | Paid | — |
| Size | 27 MB | 15 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [海昕 顾](https://appshunter.io/developer/606670314) | [Dmitry Alaev](https://appshunter.io/developer/502956595) |

## What reviewers say

### PDF快速盖章

[App page](https://appshunter.io/ios/app/pdf/id6756157531)

This app allows for quick and easy stamping of PDF documents and images. It supports batch processing for multi-page PDFs, offers a comprehensive stamp library with customization options, and simulates realistic stamp effects. It's designed for efficient mobile document signing and processing.

**Highlights:** Quick stamping for PDFs and images, Batch processing for multi-page PDFs, Customizable stamp library, Realistic stamp effects with aging, Precise stamp adjustment, One-click common stamp setup, Direct opening from external apps

**Features:** macOS Compatibility

**In-app purchases:** none


### FixCalc

[App page](https://appshunter.io/ios/app/fixcalc-material-calculator/id6778463977)

**Features:** macOS Compatibility, Family Sharing, Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FixCalc Pro Lifetime | $7.99 | one-time |


## Frequently asked questions

### Is PDF快速盖章 free?

PDF快速盖章 costs $4.99, with no in-app purchases.

### Is FixCalc free?

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

### Do PDF快速盖章 or FixCalc have ads?

Neither PDF快速盖章 nor FixCalc shows ads.

### Which is updated more often, PDF快速盖章 or FixCalc?

PDF快速盖章 ships an update every 4 months, and FixCalc weekly. Most recently, PDF快速盖章 was updated on October 24, 2026 and FixCalc on October 25, 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.*