# Time Dilation Explorer Lab vs iRelativity

The clearest difference is in-app purchases: iRelativity at none against Time Dilation Explorer Lab's 1. iRelativity also leads on ads (none vs shown) and iOS requirement (18.6 vs 26.2). On price and device support there is nothing between them.

Both are free to download. Time Dilation Explorer Lab sells 1 one-off in-app purchase. iRelativity asks for nothing beyond the download.

## The numbers

| Metric | Time Dilation Explorer Lab | iRelativity |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Size | 16 MB | 1 MB |
| Requires iOS | 26.2 | **18.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ChatStick Company Limited](https://appshunter.io/developer/1165816085) | [Vladimir Kostadinov Stoyanov](https://appshunter.io/developer/1776235767) |

## What reviewers say

### Time Dilation Explorer Lab

[App page](https://appshunter.io/ios/app/time-dilation-explorer-lab/id6773199521)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Features | $2.99 | one-time |


### iRelativity

[App page](https://appshunter.io/ios/app/irelativity/id6776330770)

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

**In-app purchases:** none


## Frequently asked questions

### Is Time Dilation Explorer Lab free?

Time Dilation Explorer Lab is free to download, with in-app purchases available.

### Is iRelativity free?

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

### Do Time Dilation Explorer Lab or iRelativity have ads?

Time Dilation Explorer Lab shows ads; iRelativity does not.

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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.*