# Stamp 4.1 vs Stamp Identifier

The clearest difference is in-app purchases: Stamp 4.1 at none against Stamp Identifier's 2. Stamp Identifier's advantage is ads (none vs shown) and update cadence (every 4 days vs every 3 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Stamp Identifier sells 2 in-app purchases, starting at $7.99 per 7 days. Stamp 4.1 asks for nothing beyond the download.

Stamp 4.1 ships an update every 3 weeks, Stamp Identifier every 4 days. The most recent releases landed on September 7, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Stamp 4.1 | Stamp Identifier |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (11 ratings)](https://appshunter.io/ios/app/stamp-identifier-stamp-id/id6742707724/reviews)** |
| Number of ratings | — | **11** |
| Positive reviews | — | 94.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Monetization | — | Free with in-app purchases |
| Size | 24 MB | 54 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Liechtensteinische Post AG](https://appshunter.io/developer/1719959009) | [ABD Co.](https://appshunter.io/developer/1825657293) |

## What reviewers say

### Stamp 4.1

[App page](https://appshunter.io/ios/app/stamp-41/id6445849795)

**In-app purchases:** none


### Stamp Identifier

[App page](https://appshunter.io/ios/app/stamp-identifier-stamp-id/id6742707724)

Instantly identify postage stamps by taking a photo. This app uses AI to provide details like origin, value, and historical context. Organize your collection and connect with other enthusiasts.

**Highlights:** AI-powered stamp identification, Detailed stamp information (origin, value, history), Extensive global stamp database, Collection organization and sorting, Community features and expert insights, Market trends and educational resources

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Access | $7.99 | per 7 days |
| Yearly Access | $34.99 | per year |


## Frequently asked questions

### Is Stamp 4.1 free?

Stamp 4.1 is free to download, with no in-app purchases.

### Is Stamp Identifier free?

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

### Do Stamp 4.1 or Stamp Identifier have ads?

Stamp 4.1 shows ads; Stamp Identifier does not.

### Which is updated more often, Stamp 4.1 or Stamp Identifier?

Stamp 4.1 ships an update every 3 weeks, and Stamp Identifier every 4 days. Most recently, Stamp 4.1 was updated on September 7, 2026 and Stamp Identifier on September 21, 2026.

---

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