# Date and Time Calculator Pro vs 電卓

The clearest difference is price: 電卓 at Free against Date and Time Calculator Pro's $0.99. 電卓 also leads on update cadence (every 5 days vs every 5 weeks). Date and Time Calculator Pro's advantage is iOS requirement (15.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

電卓 is free to download; Date and Time Calculator Pro costs $0.99 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, 電卓 every 5 days. The most recent releases landed on October 20, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Date and Time Calculator Pro | 電卓 |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| 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 5 days** |
| Monetization | Free | — |
| Size | 3 MB | 1 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [山 钟](https://appshunter.io/developer/1289109809) | [eisuke yoshikawa](https://appshunter.io/developer/1894588067) |

## 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


### 電卓

[App page](https://appshunter.io/ios/app/calcnote/id6762538775)

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

**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 電卓 free?

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

### Do Date and Time Calculator Pro or 電卓 have ads?

Neither Date and Time Calculator Pro nor 電卓 shows ads.

### Which is updated more often, Date and Time Calculator Pro or 電卓?

Date and Time Calculator Pro ships an update every 5 weeks, and 電卓 every 5 days. Most recently, Date and Time Calculator Pro was updated on October 20, 2026 and 電卓 on October 12, 2026.

---

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