# 321 vs Watermelon

The clearest difference is rating: Watermelon at 5.0 against 321's 4.2. Watermelon also leads on in-app purchases (none vs 2) and review sentiment (100% vs 66%). 321's advantage is ads (none vs shown) and ratings volume (32 vs 3). On price and device support there is nothing between them.

Both are free to download. 321 sells 2 one-off in-app purchases. Watermelon asks for nothing beyond the download.

Watermelon holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: 321 has 32 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 66% of 321's written reviews are positive against 100% of Watermelon's.

321 ships an update every 2 weeks, Watermelon every 2 days. The most recent releases landed on November 11, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | 321 | Watermelon |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (32 ratings)](https://appshunter.io/ios/app/321-angles-do-matter/id827107898/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/watermelon-merge-solar-system/id6472978476/reviews)** |
| Number of ratings | **32** | 3 |
| Positive reviews | 66.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 13 MB | 116 MB |
| Requires iOS | 17.6 | **12.0** |
| Devices | iPhone, iPad, Apple TV | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Antonio Jr](https://appshunter.io/developer/827107901) | [Davut Inat](https://appshunter.io/developer/1659681257) |

## What reviewers say

### 321

[App page](https://appshunter.io/ios/app/321-angles-do-matter/id827107898)

This physics puzzle game challenges players to make precise angle adjustments to achieve perfect passes and high scores. It offers a maddeningly addictive experience that requires mathematical engineering for optimal gameplay.

**Highlights:** Physics-based puzzles, Angle adjustment mechanics, High score challenges, Mathematical engineering gameplay, Maddeningly addictive

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Extra shot | $0.99 | one-time |
| Upgrade to Pro | $4.99 | one-time |


### Watermelon

[App page](https://appshunter.io/ios/app/watermelon-merge-solar-system/id6472978476)

Merge smaller celestial bodies to create larger planets and expand your solar system. Earn points by combining planets and aim for the highest score to climb the global leaderboard. Enjoy a unique space exploration and merging experience.

**Highlights:** Merge planets, Explore solar system, Earn points, Climb leaderboard, High score challenge

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 321 free?

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

### Is Watermelon free?

Watermelon is free to download, with no in-app purchases.

### Which has better reviews, 321 or Watermelon?

Watermelon is rated higher. 321 averages 4.2 out of 5 from 32 ratings, while Watermelon averages 5.0 from 3 ratings.

### Do 321 or Watermelon have ads?

Watermelon shows ads; 321 does not.

### Which is updated more often, 321 or Watermelon?

321 ships an update every 2 weeks, and Watermelon every 2 days. Most recently, 321 was updated on November 11, 2026 and Watermelon on November 4, 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.*