# RelativityTheory vs Time Dilation Explorer Lab

The clearest difference is price: Time Dilation Explorer Lab at Free against RelativityTheory's $0.99. RelativityTheory's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support there is nothing between them.

Time Dilation Explorer Lab is free to download; RelativityTheory costs $0.99 up front. Time Dilation Explorer Lab sells 1 one-off in-app purchase. RelativityTheory asks for nothing beyond the download.

## The numbers

| Metric | RelativityTheory | Time Dilation Explorer Lab |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | — |
| Size | 6 MB | 16 MB |
| Requires iOS | **14.4** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Takao Akatsu](https://appshunter.io/developer/1530946331) | [ChatStick Company Limited](https://appshunter.io/developer/1165816085) |

## What reviewers say

### RelativityTheory

[App page](https://appshunter.io/ios/app/relativitytheory/id1620999874)

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

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is RelativityTheory free?

RelativityTheory costs $0.99, with no in-app purchases.

### Is Time Dilation Explorer Lab free?

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

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

Time Dilation Explorer Lab shows ads; RelativityTheory 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.*