# Sool vs Niji Dreams

The clearest difference is update cadence: Niji Dreams at every 2 weeks against Sool's every 2 months. Niji Dreams also leads on iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Sool ships an update every 2 months, Niji Dreams every 2 weeks. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Sool | Niji Dreams |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Size | 4 MB | 152 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Umit UZ](https://appshunter.io/developer/1842858860) | [Yippeeai Limited](https://appshunter.io/developer/6779612452) |

## What reviewers say

### Sool

[App page](https://appshunter.io/ios/app/sool-quick-mathematic-trainer/id6756207263)

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

**In-app purchases:** none


### Niji Dreams

[App page](https://appshunter.io/ios/app/niji-dreams/id6779612450)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sool free?

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

### Is Niji Dreams free?

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

### Do Sool or Niji Dreams have ads?

Neither Sool nor Niji Dreams shows ads.

### Which is updated more often, Sool or Niji Dreams?

Sool ships an update every 2 months, and Niji Dreams every 2 weeks. Most recently, Sool was updated on October 30, 2026 and Niji Dreams on October 25, 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.*