# BIO vs ZeroTrustBioAuth

The clearest difference is iOS requirement: BIO at 13.2 against ZeroTrustBioAuth's 17.3. On price, update cadence, ads and in-app purchases there is nothing between them.

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

BIO ships an update every 3 months, ZeroTrustBioAuth every 2 months. The most recent releases landed on September 10, 2026 and December 21, 2025 respectively.

## The numbers

| Metric | BIO | ZeroTrustBioAuth |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (13 ratings)](https://appshunter.io/ios/app/bio-key-mobileauth/id1563288118/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 87 MB | 2 MB |
| Requires iOS | **13.2** | 17.3 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [BIO-key International, Inc.](https://appshunter.io/developer/487808804) | [COLLABORATIONSTUDIOS.COM, LLC](https://appshunter.io/developer/1539011938) |

## What reviewers say

### BIO

[App page](https://appshunter.io/ios/app/bio-key-mobileauth/id1563288118)

This app offers a secure, passwordless authentication method using biometrics like palm or face scans. It provides multi-factor authentication (MFA) and single sign-on (SSO) for seamless and protected access to applications and sensitive data.

**Highlights:** Passwordless authentication, Biometric login (palm, face), Multi-factor authentication (MFA), Single Sign-On (SSO), Secure access to apps and data, Supports Apple device biometrics

**In-app purchases:** none


### ZeroTrustBioAuth

[App page](https://appshunter.io/ios/app/zerotrustbioauth/id6587581224)

**In-app purchases:** none


## Frequently asked questions

### Is BIO free?

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

### Is ZeroTrustBioAuth free?

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

### Do BIO or ZeroTrustBioAuth have ads?

Neither BIO nor ZeroTrustBioAuth shows ads.

### Which is updated more often, BIO or ZeroTrustBioAuth?

BIO ships an update every 3 months, and ZeroTrustBioAuth every 2 months. Most recently, BIO was updated on September 10, 2026 and ZeroTrustBioAuth on December 21, 2025.

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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.*