# Date Calculation Assistant vs World Date Converter

The clearest difference is ads: Date Calculation Assistant at none against World Date Converter's shown. Date Calculation Assistant also leads on update cadence (every 5 days vs every 6 weeks). On price, in-app purchases, 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 and World Date Converter sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Date Calculation Assistant ships an update every 5 days, World Date Converter every 6 weeks. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Date Calculation Assistant | World Date Converter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 days** | Every 6 weeks |
| Size | 35 MB | 54 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [玉辉 黄](https://appshunter.io/developer/1852393919) | [BEK Service LTD](https://appshunter.io/developer/1865488235) |

## What reviewers say

### 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 |


### World Date Converter

[App page](https://appshunter.io/ios/app/world-date-converter/id6781126734)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is Date Calculation Assistant free?

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

### Is World Date Converter free?

World Date Converter is free to download, with in-app purchases available.

### Do Date Calculation Assistant or World Date Converter have ads?

World Date Converter shows ads; Date Calculation Assistant does not.

### Which is updated more often, Date Calculation Assistant or World Date Converter?

Date Calculation Assistant ships an update every 5 days, and World Date Converter every 6 weeks. Most recently, Date Calculation Assistant was updated on October 24, 2026 and World Date Converter on October 28, 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.*