# The Einstein`s Riddle vs Spot The Diff

The clearest difference is in-app purchases: The Einstein`s Riddle at none against Spot The Diff's 5. The Einstein`s Riddle also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Spot The Diff sells 5 one-off in-app purchases. The Einstein`s Riddle asks for nothing beyond the download.

The Einstein`s Riddle ships an update every 3 weeks, Spot The Diff every 10 days. The most recent releases landed on June 1, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | The Einstein`s Riddle | Spot The Diff |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (28 ratings)](https://appshunter.io/ios/app/the-einsteins-riddle/id1494038665/reviews)** | — |
| Number of ratings | **28** | — |
| Positive reviews | 41.2% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 10 days** |
| Monetization | Free | — |
| Size | 47 MB | 79 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Rodrigo Daboit](https://appshunter.io/developer/1317514980) | [MISTIX WATERS LLP](https://appshunter.io/developer/1895427317) |

## What reviewers say

### The Einstein`s Riddle

[App page](https://appshunter.io/ios/app/the-einsteins-riddle/id1494038665)

Engage your mind with challenging logic puzzles, including a modern take on the classic 15 Puzzle and the timeless Peg Solitaire. Test your reasoning skills with evolving rules and progressive difficulty across various game modes, designed to keep your brain sharp and active.

**Highlights:** Logic puzzle experience, Slide Puzzle (15 Puzzle), Peg Solitaire, Multiple game modes (Classic, Timer, Challenge), Progressive campaign mode, Modern visuals and animations, Brain training exercises

**Features:** macOS Compatibility

**In-app purchases:** none


### Spot The Diff

[App page](https://appshunter.io/ios/app/spot-the-diff-hidden-objects/id6790834529)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Coin Pack | $0.99 | one-time |
| Medium Coin Pack | $4.99 | one-time |
| Remove Ads | $4.99 | one-time |
| Large Coin Pack | $9.99 | one-time |
| Mega Coin Pack | $19.99 | one-time |


## Frequently asked questions

### Is The Einstein`s Riddle free?

The Einstein`s Riddle is free to download, with no in-app purchases.

### Is Spot The Diff free?

Spot The Diff is free to download, with in-app purchases available.

### Do The Einstein`s Riddle or Spot The Diff have ads?

Spot The Diff shows ads; The Einstein`s Riddle does not.

### Which is updated more often, The Einstein`s Riddle or Spot The Diff?

The Einstein`s Riddle ships an update every 3 weeks, and Spot The Diff every 10 days. Most recently, The Einstein`s Riddle was updated on June 1, 2026 and Spot The Diff on September 24, 2026.

---

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