# Cosmic Alerts vs Relativity Simulator

The clearest difference is in-app purchases: Relativity Simulator at none against Cosmic Alerts's 1. Relativity Simulator also leads on ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Cosmic Alerts sells 1 one-off in-app purchase. Relativity Simulator asks for nothing beyond the download.

## The numbers

| Metric | Cosmic Alerts | Relativity Simulator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Daily | — |
| Size | 6 MB | 15 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [AKIRA TEZUKA](https://appshunter.io/developer/6791202359) | [际 郭](https://appshunter.io/developer/6797282134) |

## What reviewers say

### Cosmic Alerts

[App page](https://appshunter.io/ios/app/cosmic-alerts-gw-and-grb-map/id6807910904)

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

**In-app purchases (1)**

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


### Relativity Simulator

[App page](https://appshunter.io/ios/app/relativity-simulator/id6811289729)

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

**In-app purchases:** none


## Frequently asked questions

### Is Cosmic Alerts free?

Cosmic Alerts is free to download, with in-app purchases available.

### Is Relativity Simulator free?

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

### Do Cosmic Alerts or Relativity Simulator have ads?

Cosmic Alerts shows ads; Relativity Simulator 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.*