# Find Differences AI Challenge vs Niji Dreams

The clearest difference is in-app purchases: Niji Dreams at none against Find Differences AI Challenge's 2. Niji Dreams also leads on ads (none vs shown) and update cadence (every 2 weeks vs every 6 months). On price and device support there is nothing between them.

Both are free to download. Find Differences AI Challenge sells 2 one-off in-app purchases. Niji Dreams asks for nothing beyond the download.

Find Differences AI Challenge ships an update every 6 months, Niji Dreams every 2 weeks. The most recent releases landed on November 4, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Find Differences AI Challenge | Niji Dreams |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (37 ratings)](https://appshunter.io/ios/app/find-differences-ai-challenge/id6499434659/reviews)** | — |
| Number of ratings | **37** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 286 MB | 152 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Alexey Romanov](https://appshunter.io/developer/1596744891) | [Yippeeai Limited](https://appshunter.io/developer/6779612452) |

## What reviewers say

### Find Differences AI Challenge

[App page](https://appshunter.io/ios/app/find-differences-ai-challenge/id6499434659)

Engage your visual perception with AI-generated images in this relaxing spot-the-difference game. Sharpen your cognitive skills with no timers, perfect for all ages seeking mental stimulation and a delightful pastime.

**Highlights:** AI-generated photorealistic images, Relaxing gameplay without timers, Brain training for cognitive skills, Intuitive and easy-to-learn gameplay, Offline play capability, Vast array of challenging levels

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Add 30 Hints | $0.99 | one-time |
| Add 300 Hints | $7.99 | one-time |


### 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 Find Differences AI Challenge free?

Find Differences AI Challenge is free to download, with in-app purchases available.

### Is Niji Dreams free?

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

### Do Find Differences AI Challenge or Niji Dreams have ads?

Find Differences AI Challenge shows ads; Niji Dreams does not.

### Which is updated more often, Find Differences AI Challenge or Niji Dreams?

Find Differences AI Challenge ships an update every 6 months, and Niji Dreams every 2 weeks. Most recently, Find Differences AI Challenge was updated on November 4, 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.*