# Date and time calc vs US単位コンバーター

The clearest difference is update cadence: US単位コンバーター at every 3 weeks against Date and time calc's every 16 months. US単位コンバーター also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Date and time calc ships an update every 16 months, US単位コンバーター every 3 weeks. Both last shipped on October 3, 2026.

## The numbers

| Metric | Date and time calc | US単位コンバーター |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 23.1% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 16 months | **Every 3 weeks** |
| Monetization | Ad-supported | — |
| Size | 6 MB | 41 MB |
| Requires iOS | 17.6 | **16.4** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Osamu Ishigami](https://appshunter.io/developer/901265058) | [Taiki Saito](https://appshunter.io/developer/995768398) |

## What reviewers say

### Date and time calc

[App page](https://appshunter.io/ios/app/date-and-time-calc/id949261920)

Easily calculate the difference between dates or add/subtract time intervals. This utility app simplifies date and time arithmetic with straightforward operations.

**Highlights:** Date difference calculation, Date addition and subtraction, Time difference calculation, Time addition and subtraction

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

**In-app purchases:** none


### US単位コンバーター

[App page](https://appshunter.io/ios/app/us/id1607728774)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Date and time calc free?

Date and time calc is free to download, with no in-app purchases.

### Is US単位コンバーター free?

US単位コンバーター is free to download, with no in-app purchases.

### Do Date and time calc or US単位コンバーター have ads?

Both Date and time calc and US単位コンバーター show ads.

### Which is updated more often, Date and time calc or US単位コンバーター?

Date and time calc ships an update every 16 months, and US単位コンバーター every 3 weeks. Most recently, Date and time calc was updated on October 3, 2026 and US単位コンバーター on October 3, 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.*