# Optimal Authenticator vs s.GUARD Mobile

The clearest difference is update cadence: s.GUARD Mobile at monthly against Optimal Authenticator's every 3 months. 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.

Optimal Authenticator ships an update every 3 months, s.GUARD Mobile monthly. The most recent releases landed on September 19, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Optimal Authenticator | s.GUARD Mobile |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (4 ratings)](https://appshunter.io/ios/app/optimal-authenticator/id1217402923/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free | — |
| Size | 80 MB | 68 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Optimal IdM](https://appshunter.io/developer/1050742329) | [instaSOLUTION AG](https://appshunter.io/developer/1124361278) |

## What reviewers say

### Optimal Authenticator

[App page](https://appshunter.io/ios/app/optimal-authenticator/id1217402923)

This app provides a secure way to verify your identity for accessing other applications. It uses two-factor authentication via push notifications or verification codes, and allows organizations to register trusted devices for sign-in requests.

**Highlights:** Two-factor authentication, Push notification verification, On-app verification codes, Trusted device registration, Secure identity verification

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

**In-app purchases:** none


### s.GUARD Mobile

[App page](https://appshunter.io/ios/app/sguard-mobile/id1464632187)

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

**In-app purchases:** none


## Frequently asked questions

### Is Optimal Authenticator free?

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

### Is s.GUARD Mobile free?

s.GUARD Mobile is free to download, with no in-app purchases.

### Do Optimal Authenticator or s.GUARD Mobile have ads?

Neither Optimal Authenticator nor s.GUARD Mobile shows ads.

### Which is updated more often, Optimal Authenticator or s.GUARD Mobile?

Optimal Authenticator ships an update every 3 months, and s.GUARD Mobile monthly. Most recently, Optimal Authenticator was updated on September 19, 2026 and s.GUARD Mobile 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.*