# CHIRAKU vs PROjections

The clearest difference is ads: PROjections at none against CHIRAKU's shown. PROjections also leads on update cadence (daily vs every 5 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

CHIRAKU ships an update every 5 months, PROjections daily. Both last shipped on October 31, 2026.

## The numbers

| Metric | CHIRAKU | PROjections |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Daily** |
| Size | 25 MB | 72 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Fuji Bit Inc.](https://appshunter.io/developer/1874205957) | [Thomas Roy](https://appshunter.io/developer/6780095310) |

## What reviewers say

### CHIRAKU

[App page](https://appshunter.io/ios/app/chiraku-earth-science-sim/id6768285896)

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

**In-app purchases:** none


### PROjections

[App page](https://appshunter.io/ios/app/projections/id6783043595)

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

**In-app purchases:** none


## Frequently asked questions

### Is CHIRAKU free?

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

### Is PROjections free?

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

### Do CHIRAKU or PROjections have ads?

CHIRAKU shows ads; PROjections does not.

### Which is updated more often, CHIRAKU or PROjections?

CHIRAKU ships an update every 5 months, and PROjections daily. Most recently, CHIRAKU was updated on October 31, 2026 and PROjections on October 31, 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.*