# Relativity Widget vs World Date Converter

The clearest difference is in-app purchases: Relativity Widget at none against World Date Converter's 1. Relativity Widget also leads on ads (none vs shown) and iOS requirement (14.0 vs 16.4). World Date Converter's advantage is update cadence (every 6 weeks vs every 6 months). On price and device support there is nothing between them.

Both are free to download. World Date Converter sells 1 one-off in-app purchase. Relativity Widget asks for nothing beyond the download.

Relativity Widget ships an update every 6 months, World Date Converter every 6 weeks. The most recent releases landed on November 3, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Relativity Widget | World Date Converter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/relativity-widget/id1534420574/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Every 6 weeks** |
| Monetization | Free | — |
| Size | 1 MB | 54 MB |
| Requires iOS | **14.0** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Eliott Morgensztern](https://appshunter.io/developer/1478504124) | [BEK Service LTD](https://appshunter.io/developer/1865488235) |

## What reviewers say

### Relativity Widget

[App page](https://appshunter.io/ios/app/relativity-widget/id1534420574)

Visualize Einstein's theories of relativity directly on your home screen. Choose between Special Relativity to see time dilation in a spaceship or General Relativity to observe time differences near a black hole.

**Highlights:** Special Relativity visualization, General Relativity visualization, Time dilation display, Home screen integration, Customizable speed/distance settings

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

**In-app purchases:** none


### 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 Relativity Widget free?

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

### Is World Date Converter free?

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

### Do Relativity Widget or World Date Converter have ads?

World Date Converter shows ads; Relativity Widget does not.

### Which is updated more often, Relativity Widget or World Date Converter?

Relativity Widget ships an update every 6 months, and World Date Converter every 6 weeks. Most recently, Relativity Widget was updated on November 3, 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.*