# The Hamiltonian Circuit vs Sumaddle

The clearest difference is rating: Sumaddle at 4.9 against The Hamiltonian Circuit's 3.8. Sumaddle also leads on review sentiment (95% vs 59%) and ads (none vs shown). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. The Hamiltonian Circuit sells 4 one-off in-app purchases and Sumaddle sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Sumaddle holds the better App Store score, 4.9 against 3.8. That said, the two scores are not equally well evidenced: Sumaddle has 769 ratings behind it against 33, so its average is the more settled of the two. Written reviews point the same way: 59% of The Hamiltonian Circuit's written reviews are positive against 95% of Sumaddle's.

The Hamiltonian Circuit ships an update every 5 weeks, Sumaddle every 3 weeks. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | The Hamiltonian Circuit | Sumaddle |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (33 ratings)](https://appshunter.io/ios/app/the-hamiltonian-circuit/id1484345208/reviews) | **[4.9 (769 ratings)](https://appshunter.io/ios/app/sumaddle/id1552172214/reviews)** |
| Number of ratings | 33 | **769** |
| Positive reviews | 59.3% of reviews | **94.9% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 64 MB | 31 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Good Thinking Games](https://appshunter.io/developer/1484345207) | [Jonathan Buchanan](https://appshunter.io/developer/1540556286) |

## What reviewers say

### The Hamiltonian Circuit

[App page](https://appshunter.io/ios/app/the-hamiltonian-circuit/id1484345208)

This challenging puzzle game requires you to find a continuous circuit that visits every square on a grid without crossing itself or walls. Progress from simple grids to complex, large-scale challenges that test your abstract thinking and problem-solving skills. Hints are available to guide you when you get stuck.

**Highlights:** Visit every square on the grid, Avoid walls and self-crossing, Progressive grid sizes (4x4 to 20x20), Hint system for assistance, Automatic progress saving, Single solution per puzzle

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pack of 50 neurons | $0.99 | one-time |
| Pack of 250 neurons | $3.99 | one-time |
| Remove Ads | $4.99 | one-time |
| Pack of 750 neurons | $9.99 | one-time |


### Sumaddle

[App page](https://appshunter.io/ios/app/sumaddle/id1552172214)

This logic puzzle game transforms pencil-and-paper challenges into interactive brain teasers. Fit number combinations to clues using pure logic, with no mental arithmetic required. Enjoy over 150 free puzzles of varying difficulty, with built-in help and offline play.

**Highlights:** Interactive logic puzzles, Number combination fitting, Pure logic solving, Built-in help and mistake correction, Over 150 free puzzles, Offline play, Ad-free experience

**Features:** Family Sharing

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Crafty, Pack 1 | $0.99 | one-time |
| Crafty, Pack 2 | $0.99 | one-time |
| Crafty, Pack 3 | $0.99 | one-time |
| Sneaky, Pack 1 | $0.99 | one-time |
| Sneaky, Pack 2 | $0.99 | one-time |
| Sneaky, Pack 3 | $0.99 | one-time |
| Tricky, Pack 1 | $0.99 | one-time |
| Tricky, Pack 2 | $0.99 | one-time |
| Tricky, Pack 3 | $0.99 | one-time |
| Puzzle Generator | $9.99 | one-time |

**What reviewers like**

- 👍 Fun and challenging game
- 👍 Clean and intuitive interface
- 👍 Helpful hint system
- 🚀 No ads or data collection
- 💡 Unique puzzle concept

**What reviewers complain about**

- 🐛 Automatic hints can be intrusive
- 🐛 Inability to replay completed puzzles
- 💡 Need more free/sample puzzles
- 💡 Difficulty progression could be improved

**Reported bugs**

- Losing progress when minimizing the app
- Inconsistent difficulty ratings

**Requested features**

- Ability to selectively pencil in notes
- More difficult puzzle options
- Synced progress across devices
- Detailed statistics and leaderboard


## Frequently asked questions

### Is The Hamiltonian Circuit free?

The Hamiltonian Circuit is free to download, with in-app purchases available.

### Is Sumaddle free?

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

### Which has better reviews, The Hamiltonian Circuit or Sumaddle?

Sumaddle is rated higher. The Hamiltonian Circuit averages 3.8 out of 5 from 33 ratings, while Sumaddle averages 4.9 from 769 ratings.

### Do The Hamiltonian Circuit or Sumaddle have ads?

The Hamiltonian Circuit shows ads; Sumaddle does not.

### Which is updated more often, The Hamiltonian Circuit or Sumaddle?

The Hamiltonian Circuit ships an update every 5 weeks, and Sumaddle every 3 weeks. Most recently, The Hamiltonian Circuit was updated on November 7, 2026 and Sumaddle on November 3, 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.*