# Thermo Sudoku vs Sumaddle

The clearest difference is price: Sumaddle at Free against Thermo Sudoku's $4.99. Sumaddle also leads on update cadence (every 3 weeks vs every 4 months) and review sentiment (95% vs 82%). Thermo Sudoku's advantage is in-app purchases (none vs 10) and iOS requirement (11.0 vs 17.0). On rating, ads and device support there is nothing between them.

Sumaddle is free to download; Thermo Sudoku costs $4.99 up front. Sumaddle sells 10 one-off in-app purchases. Thermo Sudoku asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.8 for Thermo Sudoku against 4.9 for Sumaddle. That said, the two scores are not equally well evidenced: Sumaddle has 769 ratings behind it against 145, so its average is the more settled of the two. Written reviews are what separate them: 82% of Thermo Sudoku's written reviews are positive against 95% of Sumaddle's.

Thermo Sudoku ships an update every 4 months, Sumaddle every 3 weeks. Both last shipped on November 11, 2026.

## The numbers

| Metric | Thermo Sudoku | Sumaddle |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.8 (145 ratings)](https://appshunter.io/ios/app/thermo-sudoku/id1513994223/reviews) | **[4.9 (769 ratings)](https://appshunter.io/ios/app/sumaddle/id1552172214/reviews)** |
| Number of ratings | 145 | **769** |
| Positive reviews | 82.5% of reviews | **94.9% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 48 MB | 31 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nick Carney](https://appshunter.io/developer/1434235673) | [Jonathan Buchanan](https://appshunter.io/developer/1540556286) |

## What reviewers say

### Thermo Sudoku

[App page](https://appshunter.io/ios/app/thermo-sudoku/id1513994223)

This app offers a unique twist on classic Sudoku with the addition of thermometer shapes. Digits must increase along the thermometer, creating new logical challenges and patterns. Enjoy 100 expertly crafted puzzles with hints from renowned Sudoku experts.

**Highlights:** 100 unique puzzles, Thermometer logic, Expert-crafted hints, Progressive difficulty, Star-based progression

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

**In-app purchases:** none

**What reviewers like**

- 👍 Well-made, challenging puzzles
- 💡 Handcrafted, unique puzzles
- 👍 Great logic and learning
- 👍 Intuitive and beautiful interface
- 👍 Excellent user experience

**What reviewers complain about**

- 🐛 Timer glitch/inaccurate tracking
- 🐛 Awful controls
- 🐛 Clues sometimes illogical
- 🐛 Puzzles too hard/convoluted
- 🐛 Locked puzzles behind easy ones

**Reported bugs**

- Timer adds incorrect hours/minutes
- Timer adds 44 seconds when notifications are pulled down
- Timer jumps when exiting/re-entering app
- Wrong number put into box when leaving and loading app
- Clues do not stand up to logic

**Requested features**

- Fix timer glitch
- Improve controls
- Ensure logical clues
- Add more puzzles
- Unlock all puzzles


### 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, iPhone Duo support

**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 Thermo Sudoku free?

Thermo Sudoku costs $4.99, with no in-app purchases.

### Is Sumaddle free?

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

### Which has better reviews, Thermo Sudoku or Sumaddle?

Sumaddle is rated higher. Thermo Sudoku averages 4.8 out of 5 from 145 ratings, while Sumaddle averages 4.9 from 769 ratings.

### Do Thermo Sudoku or Sumaddle have ads?

Neither Thermo Sudoku nor Sumaddle shows ads.

### Which is updated more often, Thermo Sudoku or Sumaddle?

Thermo Sudoku ships an update every 4 months, and Sumaddle every 3 weeks. Most recently, Thermo Sudoku was updated on November 11, 2026 and Sumaddle on November 11, 2026.

---

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