# i*PRiMES vs Sumaddle

The clearest difference is in-app purchases: i*PRiMES at none against Sumaddle's 15. i*PRiMES also leads on update cadence (every 9 days vs every 3 weeks) and iOS requirement (9.0 vs 17.0). Sumaddle's advantage is ratings volume (769 vs 4). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. Sumaddle sells 15 one-off in-app purchases. i*PRiMES asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for i*PRiMES against 4.9 for Sumaddle. That said, the two scores are not equally well evidenced: Sumaddle has 769 ratings behind it against 4, so its average is the more settled of the two. Written reviews are what separate them: 100% of i*PRiMES's written reviews are positive against 95% of Sumaddle's.

i*PRiMES ships an update every 9 days, Sumaddle every 3 weeks. Both last shipped on October 29, 2026.

## The numbers

| Metric | i*PRiMES | Sumaddle |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/iprimes-number-puzzle/id1439286127/reviews)** | [4.9 (769 ratings)](https://appshunter.io/ios/app/sumaddle/id1552172214/reviews) |
| Number of ratings | 4 | **769** |
| Positive reviews | **100.0% of reviews** | 94.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 3 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 64 MB | 31 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Dean Longmore](https://appshunter.io/developer/984963696) | [Jonathan Buchanan](https://appshunter.io/developer/1540556286) |

## What reviewers say

### i*PRiMES

[App page](https://appshunter.io/ios/app/iprimes-number-puzzle/id1439286127)

A minimalist puzzle game designed to enhance number literacy and cognitive skills. Enjoy bite-sized gameplay without timers or pressure, improving your ability to work with numbers in daily life.

**Highlights:** Brain strengthening puzzles, Improves number literacy, Bitesize gameplay, No timers or pressure, Endless gameplay, GameCentre scoreboards

**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 i*PRiMES free?

i*PRiMES is free to download, with no in-app purchases.

### Is Sumaddle free?

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

### Which has better reviews, i*PRiMES or Sumaddle?

i*PRiMES is rated higher. i*PRiMES averages 5.0 out of 5 from 4 ratings, while Sumaddle averages 4.9 from 769 ratings.

### Do i*PRiMES or Sumaddle have ads?

Neither i*PRiMES nor Sumaddle shows ads.

### Which is updated more often, i*PRiMES or Sumaddle?

i*PRiMES ships an update every 9 days, and Sumaddle every 3 weeks. Most recently, i*PRiMES was updated on October 29, 2026 and Sumaddle on October 29, 2026.

---

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