# NCP Authenticator vs GELSEN

The clearest difference is update cadence: GELSEN at every 3 days against NCP Authenticator's every 25 months. NCP Authenticator's advantage is iOS requirement (15.1 vs 17). 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.

NCP Authenticator ships an update every 25 months, GELSEN every 3 days. The most recent releases landed on September 10, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | NCP Authenticator | GELSEN |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 25 months | **Every 3 days** |
| Size | 18 MB | 181 MB |
| Requires iOS | **15.1** | 17 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [N C P E GmbH Network Communications Products Engineering](https://appshunter.io/developer/1187926974) | [Conntac GmbH](https://appshunter.io/developer/1305865392) |

## What reviewers say

### NCP Authenticator

[App page](https://appshunter.io/ios/app/ncp-authenticator/id1483468626)

**In-app purchases:** none


### GELSEN

[App page](https://appshunter.io/ios/app/gelsen-net/id6767538552)

**In-app purchases:** none


## Frequently asked questions

### Is NCP Authenticator free?

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

### Is GELSEN free?

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

### Do NCP Authenticator or GELSEN have ads?

Neither NCP Authenticator nor GELSEN shows ads.

### Which is updated more often, NCP Authenticator or GELSEN?

NCP Authenticator ships an update every 25 months, and GELSEN every 3 days. Most recently, NCP Authenticator was updated on September 10, 2026 and GELSEN 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.*