# BioID Facial Recognition vs Idum Authenticator

The clearest difference is in-app purchases: BioID Facial Recognition at none against Idum Authenticator's 3. BioID Facial Recognition also leads on device support (4 vs 1) and iOS requirement (13.0 vs 18.0). Idum Authenticator's advantage is update cadence (every 2 days vs every 3 months). On price and ads there is nothing between them.

Both are free to download. Idum Authenticator sells 3 in-app purchases, starting at $3.99 per 7 days. BioID Facial Recognition asks for nothing beyond the download.

BioID Facial Recognition ships an update every 3 months, Idum Authenticator every 2 days. Both last shipped on September 30, 2026.

## The numbers

| Metric | BioID Facial Recognition | Idum Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.1 (56 ratings)](https://appshunter.io/ios/app/bioid-facial-recognition/id1054317153/reviews)** | — |
| Number of ratings | **56** | — |
| Positive reviews | 13.9% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 days** |
| Monetization | Free | — |
| Size | 2 MB | 9 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [BioID GmbH](https://appshunter.io/developer/1054317152) | [IDUM](https://appshunter.io/developer/6776361265) |

## What reviewers say

### BioID Facial Recognition

[App page](https://appshunter.io/ios/app/bioid-facial-recognition/id1054317153)

This app offers secure, multifactor user authentication using facial recognition and liveness detection. It allows end-users to log in or authorize transactions conveniently and securely, replacing traditional passwords. Developers can easily integrate this biometric security into their mobile platforms.

**Highlights:** Multifactor user authentication, Facial recognition, Liveness detection, Secure login and transaction authorization, Developer integration, Password replacement

**In-app purchases:** none


### Idum Authenticator

[App page](https://appshunter.io/ios/app/idum-authenticator/id6801459486)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Idum Authenticator Pro Weekly | $3.99 | per 7 days |
| Idum Authenticator Pro Yearly | $29.99 | per year |
| Idum Authenticator Lifetime | $69.00 | one-time |


## Frequently asked questions

### Is BioID Facial Recognition free?

BioID Facial Recognition is free to download, with no in-app purchases.

### Is Idum Authenticator free?

Idum Authenticator is free to download, with in-app purchases available.

### Do BioID Facial Recognition or Idum Authenticator have ads?

Neither BioID Facial Recognition nor Idum Authenticator shows ads.

### Which is updated more often, BioID Facial Recognition or Idum Authenticator?

BioID Facial Recognition ships an update every 3 months, and Idum Authenticator every 2 days. Most recently, BioID Facial Recognition was updated on September 30, 2026 and Idum Authenticator on September 30, 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.*