# NBR Digital Stamp vs Certify Inspector

The clearest difference is update cadence: Certify Inspector at every 3 weeks against NBR Digital Stamp's every 21 months. NBR Digital Stamp's advantage is iOS requirement (12.2 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

NBR Digital Stamp ships an update every 21 months, Certify Inspector every 3 weeks. The most recent releases landed on September 28, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | NBR Digital Stamp | Certify Inspector |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 3 weeks** |
| Size | 60 MB | 118 MB |
| Requires iOS | **12.2** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [National Bureau for Revenue](https://appshunter.io/developer/1614833811) | [De La Rue International LTD](https://appshunter.io/developer/992439546) |

## What reviewers say

### NBR Digital Stamp

[App page](https://appshunter.io/ios/app/nbr-digital-stamp/id1614833809)

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

**In-app purchases:** none


### Certify Inspector

[App page](https://appshunter.io/ios/app/certify-inspector/id6737808028)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is NBR Digital Stamp free?

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

### Is Certify Inspector free?

Certify Inspector is free to download, with no in-app purchases.

### Do NBR Digital Stamp or Certify Inspector have ads?

Neither NBR Digital Stamp nor Certify Inspector shows ads.

### Which is updated more often, NBR Digital Stamp or Certify Inspector?

NBR Digital Stamp ships an update every 21 months, and Certify Inspector every 3 weeks. Most recently, NBR Digital Stamp was updated on September 28, 2026 and Certify Inspector on October 6, 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.*