# Stamp 4.1 vs Antique Identifier

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

Both are free to download. Antique Identifier sells 4 in-app purchases, starting at $6.99 per 7 days. Stamp 4.1 asks for nothing beyond the download.

Stamp 4.1 ships an update every 3 weeks, Antique Identifier every 2 months. The most recent releases landed on October 9, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Stamp 4.1 | Antique Identifier |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Size | 24 MB | 40 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Liechtensteinische Post AG](https://appshunter.io/developer/1719959009) | [Mustafa Utku Coskun](https://appshunter.io/developer/1762495030) |

## What reviewers say

### Stamp 4.1

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

**In-app purchases:** none


### Antique Identifier

[App page](https://appshunter.io/ios/app/antique-identifier-ai-value/id6744258862)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $6.99 | per 7 days |
| Monthly Premium | $9.99 | per month |
| Yearly Premium | $39.99 | per year |
| Yearly Offer | $39.99 | per year |


## Frequently asked questions

### Is Stamp 4.1 free?

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

### Is Antique Identifier free?

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

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

Stamp 4.1 shows ads; Antique Identifier does not.

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

Stamp 4.1 ships an update every 3 weeks, and Antique Identifier every 2 months. Most recently, Stamp 4.1 was updated on October 9, 2026 and Antique Identifier on October 15, 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.*