# Three vs 3

The clearest difference is review sentiment: 3 at 100% against Three's 50%. 3 also leads on price (Free vs $0.99) and rating (5.0 vs 2.0). Three's advantage is update cadence (weekly vs monthly) and iOS requirement (12.0 vs 15.0). On ratings volume, ads, in-app purchases and device support there is nothing between them.

3 is free to download; Three costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

3 holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 4 and 3 respectively. Written reviews point the same way: 50% of Three's written reviews are positive against 100% of 3's.

Three ships an update weekly, 3 monthly. The most recent releases landed on October 25, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Three | 3 |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [2.0 (4 ratings)](https://appshunter.io/ios/app/three-body-simulator/id6446972716/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/3-body/id6642661687/reviews)** |
| Number of ratings | **4** | 3 |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Monthly |
| Monetization | Paid | **Free** |
| Size | 72 MB | 9 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [骐显 梁](https://appshunter.io/developer/1314814852) | [Cubic Insights LLC](https://appshunter.io/developer/1763432190) |

## What reviewers say

### Three

[App page](https://appshunter.io/ios/app/three-body-simulator/id6446972716)

Explore celestial mechanics by simulating gravitational interactions between multiple celestial bodies. Users can add up to seven suns and an asteroid matrix to observe complex orbital behaviors and gravitational slingshot effects. The app allows for adjustments to gravity parameters for demonstration purposes.

**Highlights:** Multi-body gravitational simulation, Add up to 7 suns, Asteroid matrix simulation, Observe gravitational slingshots, Adjustable gravity parameters for demonstration, Enlarged volumes for better observation

**Features:** macOS Compatibility

**In-app purchases:** none


### 3

[App page](https://appshunter.io/ios/app/3-body/id6642661687)

Explore the wonders of gravity with this 2D N-body simulator. Experiment with celestial mechanics, create mesmerizing patterns, and customize your simulations. It's a fun and educational playground for anyone curious about physics.

**Highlights:** Simulate gravity interactions, Explore preset configurations, Customize body size, color, and trails, Educational and fun physics experiments, Create mesmerizing visual patterns

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

**In-app purchases:** none


## Frequently asked questions

### Is Three free?

Three costs $0.99, with no in-app purchases.

### Is 3 free?

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

### Which has better reviews, Three or 3?

3 is rated higher. Three averages 2.0 out of 5 from 4 ratings, while 3 averages 5.0 from 3 ratings.

### Do Three or 3 have ads?

Neither Three nor 3 shows ads.

### Which is updated more often, Three or 3?

Three ships an update weekly, and 3 monthly. Most recently, Three was updated on October 25, 2026 and 3 on October 22, 2026.

---

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