# SKI Map 3D vs U

The clearest difference is update cadence: SKI Map 3D at every 4 days against U's every 2 weeks. SKI Map 3D also leads on iOS requirement (18.6 vs 26.4). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SKI Map 3D ships an update every 4 days, U every 2 weeks. The most recent releases landed on October 10, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | SKI Map 3D | U |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 2 weeks |
| Size | 38 MB | 10 MB |
| Requires iOS | **18.6** | 26.4 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [梁 严](https://appshunter.io/developer/1885402458) | [Yao YungTai](https://appshunter.io/developer/6805562795) |

## What reviewers say

### SKI Map 3D

[App page](https://appshunter.io/ios/app/ski-map-3d/id6803307159)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### U

[App page](https://appshunter.io/ios/app/u-dive/id6805562793)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SKI Map 3D free?

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

### Is U free?

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

### Do SKI Map 3D or U have ads?

Neither SKI Map 3D nor U shows ads.

### Which is updated more often, SKI Map 3D or U?

SKI Map 3D ships an update every 4 days, and U every 2 weeks. Most recently, SKI Map 3D was updated on October 10, 2026 and U on October 16, 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.*