# Sentinel vs IDentiSurge

The clearest difference is ads: Sentinel at none against IDentiSurge's shown. IDentiSurge's advantage is update cadence (every 3 days vs every 4 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

Sentinel ships an update every 4 months, IDentiSurge every 3 days. The most recent releases landed on October 20, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Sentinel | IDentiSurge |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 9.8% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 3 days** |
| Monetization | Free | — |
| Size | 8 MB | 95 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Reference Point Limited](https://appshunter.io/developer/662867085) | [Identisurge LTD](https://appshunter.io/developer/1804866616) |

## What reviewers say

### Sentinel

[App page](https://appshunter.io/ios/app/sentinel/id662867082)

Access and verify Network Rail Sentinel smartcards. Check your own card details or authenticate team members and conduct spot checks. Works online for real-time data or offline for card access and stored check history.

**Highlights:** Read Sentinel smartcards via NFC, Scan QR codes for card data, Verify cardholder information, Authenticate team members, Perform spot checks, Check TVPs (Track Vacancy Permits), Offline access to card data

**In-app purchases:** none


### IDentiSurge

[App page](https://appshunter.io/ios/app/identisurge/id6743840653)

**In-app purchases:** none


## Frequently asked questions

### Is Sentinel free?

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

### Is IDentiSurge free?

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

### Do Sentinel or IDentiSurge have ads?

IDentiSurge shows ads; Sentinel does not.

### Which is updated more often, Sentinel or IDentiSurge?

Sentinel ships an update every 4 months, and IDentiSurge every 3 days. Most recently, Sentinel was updated on October 20, 2026 and IDentiSurge on October 12, 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.*