# Scale Sync Maps vs Dual

The clearest difference is in-app purchases: Dual at none against Scale Sync Maps's 1. Dual also leads on iOS requirement (15.8.3 vs 17.0). Scale Sync Maps's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Scale Sync Maps sells 1 one-off in-app purchase. Dual asks for nothing beyond the download.

## The numbers

| Metric | Scale Sync Maps | Dual |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | — | Every 2 weeks |
| Size | 1 MB | 36 MB |
| Requires iOS | 17.0 | **15.8.3** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tatsuya Yamaguchi](https://appshunter.io/developer/447542345) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### Scale Sync Maps

[App page](https://appshunter.io/ios/app/scale-sync-maps/id6473813026)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Access Unlock | $1.99 | one-time |


### Dual

[App page](https://appshunter.io/ios/app/dual-view-map/id6741985290)

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

**In-app purchases:** none


## Frequently asked questions

### Is Scale Sync Maps free?

Scale Sync Maps is free to download, with in-app purchases available.

### Is Dual free?

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

### Do Scale Sync Maps or Dual have ads?

Dual shows ads; Scale Sync Maps does not.

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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.*