# Rainfall Sandbox vs Open Planetarium

Rainfall Sandbox and Open Planetarium are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Rainfall Sandbox | Open Planetarium |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Size | 49 MB | 26 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Smithsonian Institution](https://appshunter.io/developer/370564865) | [CatsAI Agency](https://appshunter.io/developer/6799471013) |

## What reviewers say

### Rainfall Sandbox

[App page](https://appshunter.io/ios/app/rainfall-sandbox/id6736621542)

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

**In-app purchases:** none


### Open Planetarium

[App page](https://appshunter.io/ios/app/open-planetarium/id6799616519)

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

**In-app purchases:** none


## Frequently asked questions

### Is Rainfall Sandbox free?

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

### Is Open Planetarium free?

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

### Do Rainfall Sandbox or Open Planetarium have ads?

Neither Rainfall Sandbox nor Open Planetarium shows ads.

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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.*