# Authenticator vs STP Viewer

The clearest difference is rating: Authenticator at 5.0 against STP Viewer's 3.0. Authenticator also leads on ratings volume (3 vs 1). STP Viewer's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 16.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Authenticator sells 3 in-app purchases, starting at $6.99 per 7 days and STP Viewer sells 3 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Authenticator holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

## The numbers

| Metric | Authenticator | STP Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/authenticator-mfa-auth-and-totp/id6756618123/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/stp-viewer-step-3d/id6770497525/reviews) |
| Number of ratings | **3** | 1 |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | — |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 38 MB | 44 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Ditlev Carlsen](https://appshunter.io/developer/1861832011) | [CODIGITAL SOLUTIONS](https://appshunter.io/developer/1829802387) |

## What reviewers say

### Authenticator

[App page](https://appshunter.io/ios/app/authenticator-mfa-auth-and-totp/id6756618123)

This app generates one-time passwords (OTPs) to add an extra layer of security to your online accounts. It supports time-based OTPs for various popular services and offers quick setup via QR code scanning. Designed for privacy and security, it helps protect your data from unauthorized access.

**Highlights:** Generates secure TOTP codes, Supports major platforms and services, Quick setup with QR code scanning, Offline code generation, Clean and simple interface, Privacy and security focused

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $6.99 | per 7 days |
| Monthly | $19.99 | per month |
| Yearly | $49.99 | per year |


### STP Viewer

[App page](https://appshunter.io/ios/app/stp-viewer-step-3d/id6770497525)

This application allows users to open and view large, complex 3D CAD files on their mobile devices. It supports standard STEP and STP file formats, offering smooth navigation and offline accessibility for professionals and enthusiasts alike.

**Highlights:** Open STP and STEP files, Fluid 3D navigation (orbit, pan, zoom), Instant file loading from various sources, View complex assemblies, Offline accessibility, Battery and RAM efficient, Supports files from major CAD software

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Access | $1.99 | per 7 days |
| Pro Access | $4.99 | per month |
| Pro Access | $9.99 | per year |


## Frequently asked questions

### Is Authenticator free?

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

### Is STP Viewer free?

STP Viewer is free to download, with in-app purchases available.

### Which has better reviews, Authenticator or STP Viewer?

Authenticator is rated higher. Authenticator averages 5.0 out of 5 from 3 ratings, while STP Viewer averages 3.0 from 1 ratings.

### Do Authenticator or STP Viewer have ads?

Neither Authenticator nor STP Viewer 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.*