# 日期計算 vs Date Calculation Assistant

The clearest difference is in-app purchases: 日期計算 at none against Date Calculation Assistant's 2. Date Calculation Assistant's advantage is ads (none vs shown) and update cadence (every 5 days vs every 3 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Date Calculation Assistant sells 2 in-app purchases, starting at $0.99 per month. 日期計算 asks for nothing beyond the download.

日期計算 ships an update every 3 months, Date Calculation Assistant every 5 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | 日期計算 | Date Calculation Assistant |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/id1395288604/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 5 days** |
| Monetization | Free | — |
| Size | 6 MB | 35 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Huaping Ye](https://appshunter.io/developer/1639123510) | [玉辉 黄](https://appshunter.io/developer/1852393919) |

## What reviewers say

### 日期計算

[App page](https://appshunter.io/ios/app/id1395288604)

Easily determine the number of days between two specific dates. This tool also calculates an end date based on a starting date and a specified duration. It offers options to include or exclude the first day in the calculation.

**Highlights:** Calculate difference between two dates, Calculate end date from start date and period, Set days inclusive, Exclude first day option, Free to use

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

**In-app purchases:** none


### Date Calculation Assistant

[App page](https://appshunter.io/ios/app/date-calculation-assistant/id6758889725)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.99 | per month |
| Yearly Subscription | $5.99 | per year |


## Frequently asked questions

### Is 日期計算 free?

日期計算 is free to download, with no in-app purchases.

### Is Date Calculation Assistant free?

Date Calculation Assistant is free to download, with in-app purchases available.

### Do 日期計算 or Date Calculation Assistant have ads?

日期計算 shows ads; Date Calculation Assistant does not.

### Which is updated more often, 日期計算 or Date Calculation Assistant?

日期計算 ships an update every 3 months, and Date Calculation Assistant every 5 days. Most recently, 日期計算 was updated on October 24, 2026 and Date Calculation Assistant on October 24, 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.*