# Sentry NFC vs E Sentry Systems

The clearest difference is update cadence: E Sentry Systems at every 3 weeks against Sentry NFC's every 14 months. Sentry NFC's advantage is iOS requirement (14.0 vs 16.0). 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.

Sentry NFC ships an update every 14 months, E Sentry Systems every 3 weeks. The most recent releases landed on June 4, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Sentry NFC | E Sentry Systems |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/sentry-nfc/id1604634174/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 1 MB | 54 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SentryCard Technologies, Inc.](https://appshunter.io/developer/1604634176) | [IRISS Inc,](https://appshunter.io/developer/1245323320) |

## What reviewers say

### Sentry NFC

[App page](https://appshunter.io/ios/app/sentry-nfc/id1604634174)

This utility app enables users to enroll their biometric Sentry Card using their smartphone. It facilitates secure card management and access through your mobile device.

**Highlights:** Biometric Sentry Card enrollment, Phone-based card management, Secure access via smartphone, Card enrollment utility

**Features:** macOS Compatibility

**In-app purchases:** none


### E Sentry Systems

[App page](https://appshunter.io/ios/app/e-sentry-systems/id6444192723)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sentry NFC free?

Sentry NFC is free to download, with no in-app purchases.

### Is E Sentry Systems free?

E Sentry Systems is free to download, with no in-app purchases.

### Do Sentry NFC or E Sentry Systems have ads?

Neither Sentry NFC nor E Sentry Systems shows ads.

### Which is updated more often, Sentry NFC or E Sentry Systems?

Sentry NFC ships an update every 14 months, and E Sentry Systems every 3 weeks. Most recently, Sentry NFC was updated on June 4, 2026 and E Sentry Systems on September 9, 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.*