# Date and Time Calculator Pro vs PDF快速盖章

The clearest difference is price: Date and Time Calculator Pro at $0.99 against PDF快速盖章's $4.99. Date and Time Calculator Pro also leads on update cadence (every 5 weeks vs every 4 months) and iOS requirement (15.0 vs 17.6). On ads, in-app purchases and device support there is nothing between them.

Date and Time Calculator Pro costs $0.99 and PDF快速盖章 $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Date and Time Calculator Pro ships an update every 5 weeks, PDF快速盖章 every 4 months. The most recent releases landed on September 25, 2026 and September 1, 2026 respectively.

## The numbers

| Metric | Date and Time Calculator Pro | PDF快速盖章 |
| --- | --- | --- |
| Price | **$0.99** | $4.99 |
| Rating | **[4.8 (947 ratings)](https://appshunter.io/ios/app/date-and-time-calculator-pro/id582268389/reviews)** | — |
| Number of ratings | **947** | — |
| Positive reviews | 88.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 4 months |
| Monetization | **Free** | Paid |
| Size | 3 MB | 27 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [山 钟](https://appshunter.io/developer/1289109809) | [海昕 顾](https://appshunter.io/developer/606670314) |

## What reviewers say

### Date and Time Calculator Pro

[App page](https://appshunter.io/ios/app/date-and-time-calculator-pro/id582268389)

Calculate the precise time difference between any two dates and times, down to the second.  Easily determine future or past dates based on a specified duration. Ideal for tracking events, financial periods, or personal milestones.

**Highlights:** Calculate time distance between dates, Calculate days after a specific date, Calculate date before a specific date, Second-level precision, Period time calculation

**In-app purchases:** none

**What reviewers like**

- 👍 Extremely useful
- 👍 Great app
- 👍 Excellent tool
- 👍 Useful
- 👍 Perfect app

**What reviewers complain about**

- 🐛 Ads even after buying
- 🐛 Paid for app but still has ads
- 🐛 Pro version has ads
- 🐛 Can't reinstall my purchased app

**Reported bugs**

- Paid version has lost the ability to calculate future dates based on weeks
- Date selection uses a scroll wheel instead of keypad entry
- Unable to copy or share calculation results

**Requested features**

- Add ability to change year for date time calculation
- Implement dark mode
- Add iPad version
- Add divide option in time calculator
- Add ability to calculate working days


### 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


## Frequently asked questions

### Is Date and Time Calculator Pro free?

Date and Time Calculator Pro costs $0.99, with no in-app purchases.

### Is PDF快速盖章 free?

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

### Do Date and Time Calculator Pro or PDF快速盖章 have ads?

Neither Date and Time Calculator Pro nor PDF快速盖章 shows ads.

### Which is updated more often, Date and Time Calculator Pro or PDF快速盖章?

Date and Time Calculator Pro ships an update every 5 weeks, and PDF快速盖章 every 4 months. Most recently, Date and Time Calculator Pro was updated on September 25, 2026 and PDF快速盖章 on September 1, 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.*