# Photo Differences Old Castles vs Find Differences Big Challenge

The clearest difference is update cadence: Find Differences Big Challenge at weekly against Photo Differences Old Castles's monthly. 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.

Photo Differences Old Castles ships an update monthly, Find Differences Big Challenge weekly. The most recent releases landed on September 15, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Photo Differences Old Castles | Find Differences Big Challenge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (12 ratings)](https://appshunter.io/ios/app/find-differences-big-challenge/id6462783980/reviews)** |
| Number of ratings | — | **12** |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Monthly | **Weekly** |
| Monetization | — | Ad-supported |
| Size | 79 MB | 131 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Adrijana Jakovljevic](https://appshunter.io/developer/1486022934) | [秀华 谭](https://appshunter.io/developer/1682161857) |

## What reviewers say

### Photo Differences Old Castles

[App page](https://appshunter.io/ios/app/photo-differences-old-castles/id1664135973)

**Features:** macOS Compatibility

**In-app purchases:** none


### Find Differences Big Challenge

[App page](https://appshunter.io/ios/app/find-differences-big-challenge/id6462783980)

Sharpen your observation and concentration skills by spotting five differences between pairs of images. This free puzzle game offers a relaxed experience with no time limits, making it easy to enjoy. It's a fun way to train your brain with engaging visual challenges.

**Highlights:** No time limit gameplay, All features are free, Find 5 differences per level, Improves concentration, Observation skill training

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Photo Differences Old Castles free?

Photo Differences Old Castles is free to download, with no in-app purchases.

### Is Find Differences Big Challenge free?

Find Differences Big Challenge is free to download, with no in-app purchases.

### Do Photo Differences Old Castles or Find Differences Big Challenge have ads?

Both Photo Differences Old Castles and Find Differences Big Challenge show ads.

### Which is updated more often, Photo Differences Old Castles or Find Differences Big Challenge?

Photo Differences Old Castles ships an update monthly, and Find Differences Big Challenge weekly. Most recently, Photo Differences Old Castles was updated on September 15, 2026 and Find Differences Big Challenge on September 17, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*