# Relay Check vs FTCOS Authenticator

The clearest difference is iOS requirement: FTCOS Authenticator at 15.6 against Relay Check's 17.0. 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.

## The numbers

| Metric | Relay Check | FTCOS Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Size | 7 MB | 32 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [JAMF Software](https://appshunter.io/developer/290965542) | [FEITIAN Technologies Co.,Ltd.](https://appshunter.io/developer/398121823) |

## What reviewers say

### Relay Check

[App page](https://appshunter.io/ios/app/relay-check/id6742145178)

**Features:** Vision Pro support

**In-app purchases:** none


### FTCOS Authenticator

[App page](https://appshunter.io/ios/app/ftcos-authenticator/id6798172289)

**In-app purchases:** none


## Frequently asked questions

### Is Relay Check free?

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

### Is FTCOS Authenticator free?

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

### Do Relay Check or FTCOS Authenticator have ads?

Neither Relay Check nor FTCOS Authenticator shows ads.

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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.*