# Stamp Identifier vs Modern GB Stamp Decoder

The clearest difference is update cadence: Modern GB Stamp Decoder at every 9 days against Stamp Identifier's every 3 months. Stamp Identifier's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Stamp Identifier sells 2 in-app purchases, starting at $4.99 per 7 days and Modern GB Stamp Decoder sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Stamp Identifier ships an update every 3 months, Modern GB Stamp Decoder every 9 days. The most recent releases landed on October 28, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Stamp Identifier | Modern GB Stamp Decoder |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 9 days** |
| Size | 45 MB | 96 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Manuel Worlitzer](https://appshunter.io/developer/1785527240) | [Modern GB](https://appshunter.io/developer/1856873692) |

## What reviewers say

### Stamp Identifier

[App page](https://appshunter.io/ios/app/stamp-identifier-ai-scan/id6747877409)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stamp Identifier Premium | $4.99 | per 7 days |
| Stamp Identifier Premium | $24.99 | per year |


### Modern GB Stamp Decoder

[App page](https://appshunter.io/ios/app/modern-gb-stamp-decoder/id6755879525)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Core Monthly | $0.99 | per month |
| Pro Core Annual | $9.99 | per year |


## Frequently asked questions

### Is Stamp Identifier free?

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

### Is Modern GB Stamp Decoder free?

Modern GB Stamp Decoder is free to download, with in-app purchases available.

### Do Stamp Identifier or Modern GB Stamp Decoder have ads?

Neither Stamp Identifier nor Modern GB Stamp Decoder shows ads.

### Which is updated more often, Stamp Identifier or Modern GB Stamp Decoder?

Stamp Identifier ships an update every 3 months, and Modern GB Stamp Decoder every 9 days. Most recently, Stamp Identifier was updated on October 28, 2026 and Modern GB Stamp Decoder on October 23, 2026.

---

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