# ADR Zone vs Stamp Identifier

The clearest difference is in-app purchases: ADR Zone at none against Stamp Identifier's 1. ADR Zone also leads on device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Stamp Identifier sells 1 in-app purchase, starting at $3.99 per 7 days. ADR Zone asks for nothing beyond the download.

## The numbers

| Metric | ADR Zone | Stamp Identifier |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Size | 36 MB | 7 MB |
| Requires iOS | **15.1** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Plamen Markov](https://appshunter.io/developer/1896686807) | [Mert Can ILDEM](https://appshunter.io/developer/1896700218) |

## What reviewers say

### ADR Zone

[App page](https://appshunter.io/ios/app/adr-zone/id6769773386)

**Features:** macOS Compatibility

**In-app purchases:** none


### Stamp Identifier

[App page](https://appshunter.io/ios/app/stamp-identifierscan-value-ai/id6773376543)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stamp Identifier Weekly Premium | $3.99 | per 7 days |


## Frequently asked questions

### Is ADR Zone free?

ADR Zone 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 ADR Zone or Stamp Identifier have ads?

Neither ADR Zone nor Stamp Identifier shows ads.

---

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