# Logic Riddle vs Einstein's secret book

The clearest difference is review sentiment: Logic Riddle at 90% against Einstein's secret book's 44%. Logic Riddle also leads on ratings volume (5.7K vs 2) and rating (4.8 vs 4.5). Einstein's secret book's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 3 months). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Logic Riddle sells 1 in-app purchase, starting at $2.99 per year and Einstein's secret book sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Logic Riddle holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: Logic Riddle has 5.7K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 90% of Logic Riddle's written reviews are positive against 44% of Einstein's secret book's.

Logic Riddle ships an update every 3 months, Einstein's secret book every 3 weeks. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Logic Riddle | Einstein's secret book |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5.7K ratings)](https://appshunter.io/ios/app/logic-riddle/id950326185/reviews)** | [4.5 (2 ratings)](https://appshunter.io/ios/app/einsteins-secret-book/id1457503679/reviews) |
| Number of ratings | **5.7K** | 2 |
| Positive reviews | **90.5% of reviews** | 44.4% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 46 MB | 93 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rottz Games](https://appshunter.io/developer/945885227) | [Godline Studios Sociedad Limitada](https://appshunter.io/developer/1057959906) |

## What reviewers say

### Logic Riddle

[App page](https://appshunter.io/ios/app/logic-riddle/id950326185)

Engage your brain with a logic puzzle game that challenges you to deduce a scenario using only a set of clues. Solve thousands of riddles, from simple to complex, with daily challenges and helpful filters.

**Highlights:** Thousands of logic riddles, Daily free challenges, Increasing difficulty levels, Expert filters for hints, Mobile-optimized interface, Auto-save functionality

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $2.99 | per year |

**What reviewers like**

- 👍 Challenging yet fun logic puzzles
- 🧠 Exercises the brain
- 🎨 Visually appealing graphics
- 🕰️ No time pressure or limits
- 💰 Free to play with minimal ads

**What reviewers complain about**

- 🔍 Repetitive icons and categories
- 🚫 Lack of an ad-free paid version
- 🤯 Insane difficulty levels can be frustrating
- 🔀 Inability to undo more than 29 moves
- 🏆 No progress tracking or achievements

**Reported bugs**

- Clues not always sufficient to solve puzzles
- Laggy performance on some devices
- Occasional glitches with filtering and selecting
- Ads interfering with gameplay and concentration

**Requested features**

- Option to take notes or link clues
- Ability to highlight related objects
- Varied themes and visual elements
- Hint system for stuck puzzles
- Offline mode or cloud sync


### Einstein's secret book

[App page](https://appshunter.io/ios/app/einsteins-secret-book/id1457503679)

Explore Albert Einstein's life and scientific achievements through an interactive book. Engage in various tests covering music, geography, the universe, and logic to challenge your knowledge and complete the book.

**Highlights:** Biography of Albert Einstein, Scientific achievements overview, Chapter-based learning, Knowledge-testing challenges, Logic and dexterity games, Multilingual support

**Features:** macOS Compatibility

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Add live | $0.99 | one-time |
| Remove ads | $1.99 | one-time |
| Donate | $1.99 | one-time |
| Remove ads | $2.99 | one-time |
| Donate | $2.99 | one-time |
| Donate | $4.99 | one-time |
| Donate | $8.99 | one-time |
| Donate | $17.99 | one-time |


## Frequently asked questions

### Is Logic Riddle free?

Logic Riddle is free to download, with in-app purchases available.

### Is Einstein's secret book free?

Einstein's secret book is free to download, with in-app purchases available.

### Which has better reviews, Logic Riddle or Einstein's secret book?

Logic Riddle is rated higher. Logic Riddle averages 4.8 out of 5 from 5.7K ratings, while Einstein's secret book averages 4.5 from 2 ratings.

### Do Logic Riddle or Einstein's secret book have ads?

Logic Riddle shows ads; Einstein's secret book does not.

### Which is updated more often, Logic Riddle or Einstein's secret book?

Logic Riddle ships an update every 3 months, and Einstein's secret book every 3 weeks. Most recently, Logic Riddle was updated on November 6, 2026 and Einstein's secret book on November 2, 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.*