# 2D Flight Dynamics vs Stamp Value Scanner for US

The clearest difference is in-app purchases: 2D Flight Dynamics at none against Stamp Value Scanner for US's 2. 2D Flight Dynamics also leads on ads (none vs shown) and device support (3 vs 1). On price there is nothing between them.

Both are free to download. Stamp Value Scanner for US sells 2 in-app purchases, starting at $7.99 per 7 days. 2D Flight Dynamics asks for nothing beyond the download.

## The numbers

| Metric | 2D Flight Dynamics | Stamp Value Scanner for US |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (5 ratings)](https://appshunter.io/ios/app/stamp-value-scanner-for-us/id6747854261/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Every 3 days |
| Monetization | — | Free with in-app purchases |
| Size | 60 MB | 21 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Imperial College London](https://appshunter.io/developer/547377669) | [Dung Vu](https://appshunter.io/developer/1797970314) |

## What reviewers say

### 2D Flight Dynamics

[App page](https://appshunter.io/ios/app/2d-flight-dynamics/id1534109989)

**Features:** macOS Compatibility

**In-app purchases:** none


### Stamp Value Scanner for US

[App page](https://appshunter.io/ios/app/stamp-value-scanner-for-us/id6747854261)

Instantly identify US and global stamps using AI and get accurate market value estimates. Manage your stamp collection digitally, spot rare finds, and explore stamp details and history. Perfect for both new and experienced collectors.

**Highlights:** AI-powered stamp identification, Market value estimates, Personal collection management, Rare and vintage stamp detection, Stamp details and history browsing

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $7.99 | per 7 days |
| Premium Annual | $39.99 | per year |


## Frequently asked questions

### Is 2D Flight Dynamics free?

2D Flight Dynamics is free to download, with no in-app purchases.

### Is Stamp Value Scanner for US free?

Stamp Value Scanner for US is free to download, with in-app purchases available.

### Do 2D Flight Dynamics or Stamp Value Scanner for US have ads?

Stamp Value Scanner for US shows ads; 2D Flight Dynamics 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.*