# Hidden Differences vs SMRT

The clearest difference is in-app purchases: SMRT at none against Hidden Differences's 5. SMRT also leads on update cadence (every 2 days vs every 3 months). Hidden Differences's advantage is iOS requirement (13.0 vs 16.4). On price, ads and device support there is nothing between them.

Both are free to download. Hidden Differences sells 5 in-app purchases, starting at $4.99 per 7 days. SMRT asks for nothing beyond the download.

Hidden Differences ships an update every 3 months, SMRT every 2 days. The most recent releases landed on October 28, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Hidden Differences | SMRT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (18K ratings)](https://appshunter.io/ios/app/hidden-differencesspot-and-find/id1521738956/reviews)** | — |
| Number of ratings | **18K** | — |
| Positive reviews | 49.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 423 MB | 59 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Azur Interactive Games Limited](https://appshunter.io/developer/1296347323) | [Mohamed Lotfy](https://appshunter.io/developer/6771838711) |

## What reviewers say

### Hidden Differences

[App page](https://appshunter.io/ios/app/hidden-differencesspot-and-find/id1521738956)

Engage in a captivating photo hunt adventure to find subtle discrepancies between two seemingly identical images. Utilize keen observation skills to uncover hidden objects and advance through diverse, beautifully rendered locations. This game offers a relaxing yet challenging experience for puzzle enthusiasts.

**Highlights:** Find 5 differences between pictures, Explore 70+ stunning locations, Discover 3500+ unique items, Over 1400 photo hunt quests, Highly detailed graphics, Relaxing soundtrack

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Subscription | $4.99 | per 7 days |
| Find hidden objects with hints | $1.99 | one-time |
| No ads | $2.99 | one-time |
| 15 hints | $4.99 | one-time |
| 70 hints | $19.99 | one-time |

**What reviewers like**

- 🎨 Beautiful graphics
- 🧠 Challenging puzzles
- 🕰️ Relaxing gameplay
- 👍 Fun and entertaining

**What reviewers complain about**

- 💸 Excessive ads
- 🤑 Expensive subscription
- 🤯 Repetitive images
- 🤔 Lack of difficulty options

**Reported bugs**

- Crashes and freezes
- Issues with closing the app

**Requested features**

- Add difficulty levels
- Improve ad frequency and duration
- Provide a one-time purchase option


### SMRT

[App page](https://appshunter.io/ios/app/smrt-brain-training-puzzles/id6779642498)

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

**In-app purchases:** none


## Frequently asked questions

### Is Hidden Differences free?

Hidden Differences is free to download, with in-app purchases available.

### Is SMRT free?

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

### Do Hidden Differences or SMRT have ads?

Both Hidden Differences and SMRT show ads.

### Which is updated more often, Hidden Differences or SMRT?

Hidden Differences ships an update every 3 months, and SMRT every 2 days. Most recently, Hidden Differences was updated on October 28, 2026 and SMRT on October 6, 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.*