# UnivMap vs Three

The clearest difference is in-app purchases: UnivMap at none against Three's 1. Three's advantage is update cadence (every 4 days vs every 9 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Three sells 1 one-off in-app purchase. UnivMap asks for nothing beyond the download.

UnivMap ships an update every 9 days, Three every 4 days. The most recent releases landed on October 8, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | UnivMap | Three |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/three-body-simulation/id6817179834/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 4 days** |
| Monetization | — | Free with in-app purchases |
| Size | 31 MB | 6 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [宇輝資訊有限公司](https://appshunter.io/developer/1888426874) | [志强 曾](https://appshunter.io/developer/1800987336) |

## What reviewers say

### UnivMap

[App page](https://appshunter.io/ios/app/univmap/id6806794531)

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

**In-app purchases:** none


### Three

[App page](https://appshunter.io/ios/app/three-body-simulation/id6817179834)

Explore the fascinating beauty of gravity and celestial motion. Interact with three bodies, discover countless orbital paths, and experiment with your own gravity scenarios. Turn curiosity into understanding with this educational simulation.

**Highlights:** Explore 16 classic periodic solutions, Discover 10,059 3D periodic orbits, Experiment with custom gravity scenarios, Learn about the three-body problem, Offline exploration of orbits, Interactive celestial motion simulation

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Lifetime Unlock | $0.99 | one-time |


## Frequently asked questions

### Is UnivMap free?

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

### Is Three free?

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

### Do UnivMap or Three have ads?

Neither UnivMap nor Three shows ads.

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

UnivMap ships an update every 9 days, and Three every 4 days. Most recently, UnivMap was updated on October 8, 2026 and Three on October 19, 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.*