# Proof Authentication vs Sentra AI

The clearest difference is iOS requirement: Sentra AI at 15.1 against Proof Authentication's 17.6. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 11, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Proof Authentication | Sentra AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (7 ratings)](https://appshunter.io/ios/app/proof-authentication/id1589988080/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | — |
| Size | 75 MB | 37 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Proof Authentication Corporation](https://appshunter.io/developer/1604240795) | [Bizz Technologies LTD](https://appshunter.io/developer/1824310328) |

## What reviewers say

### Proof Authentication

[App page](https://appshunter.io/ios/app/proof-authentication/id1589988080)

Verify product authenticity instantly by scanning official security marks. Ensure your purchases are genuine with rapid and accurate authentication. Look for the Proof Security Mark on select consumer goods.

**Highlights:** Instant product authentication, Scan Official Proof Security Marks, High accuracy verification, Fast results, Supports selected consumer items

**Features:** Vision Pro support

**In-app purchases:** none


### Sentra AI

[App page](https://appshunter.io/ios/app/sentra-ai/id6770271162)

**In-app purchases:** none


## Frequently asked questions

### Is Proof Authentication free?

Proof Authentication is free to download, with no in-app purchases.

### Is Sentra AI free?

Sentra AI is free to download, with no in-app purchases.

### Do Proof Authentication or Sentra AI have ads?

Neither Proof Authentication nor Sentra AI shows ads.

### Which is updated more often, Proof Authentication or Sentra AI?

Proof Authentication ships an update every 2 months, and Sentra AI every 2 months. Most recently, Proof Authentication was updated on October 11, 2026 and Sentra AI on October 7, 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.*