# Unit 404 vs Sumaddle

The clearest difference is price: Sumaddle at Free against Unit 404's $1.99. Sumaddle also leads on ratings volume (767 vs 17). Unit 404's advantage is in-app purchases (none vs 15) and update cadence (every 3 days vs every 3 weeks). On rating, review sentiment, ads and device support there is nothing between them.

Sumaddle is free to download; Unit 404 costs $1.99 up front. Sumaddle sells 15 one-off in-app purchases. Unit 404 asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.8 for Unit 404 against 4.9 for Sumaddle. That said, the two scores are not equally well evidenced: Sumaddle has 767 ratings behind it against 17, so its average is the more settled of the two. Written reviews are what separate them: 89% of Unit 404's written reviews are positive against 95% of Sumaddle's.

Unit 404 ships an update every 3 days, Sumaddle every 3 weeks. The most recent releases landed on September 18, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Unit 404 | Sumaddle |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [4.8 (17 ratings)](https://appshunter.io/ios/app/unit-404/id1518191729/reviews) | **[4.9 (767 ratings)](https://appshunter.io/ios/app/sumaddle/id1552172214/reviews)** |
| Number of ratings | 17 | **767** |
| Positive reviews | 89.3% of reviews | **94.9% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 3 weeks |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 596 MB | 30 MB |
| Requires iOS | **10.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [Maxim Urusov](https://appshunter.io/developer/827886412) | [Jonathan Buchanan](https://appshunter.io/developer/1540556286) |

## What reviewers say

### Unit 404

[App page](https://appshunter.io/ios/app/unit-404/id1518191729)

Navigate an abandoned sci-fi complex by solving intricate puzzles in this platformer. Explore over 70 unique levels, each with evolving mechanics and visual styles, as the challenge steadily increases.

**Highlights:** Sci-fi puzzle platformer gameplay, Over 70 handcrafted levels, Evolving game mechanics, Increasing difficulty, Unique visual themes

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 (15)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Quirky, Pack 5 | $0.99 | one-time |
| Very Difficult Puzzles | $0.99 | one-time |
| Quirky, Pack 1 | $0.99 | one-time |
| Premium 9x9 Puzzles, Pack 1 | $0.99 | one-time |
| 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 |
| Assorted Puzzles | $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 Unit 404 free?

Unit 404 costs $1.99, with no in-app purchases.

### Is Sumaddle free?

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

### Which has better reviews, Unit 404 or Sumaddle?

Sumaddle is rated higher. Unit 404 averages 4.8 out of 5 from 17 ratings, while Sumaddle averages 4.9 from 767 ratings.

### Do Unit 404 or Sumaddle have ads?

Neither Unit 404 nor Sumaddle shows ads.

### Which is updated more often, Unit 404 or Sumaddle?

Unit 404 ships an update every 3 days, and Sumaddle every 3 weeks. Most recently, Unit 404 was updated on September 18, 2026 and Sumaddle on September 25, 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.*