# Authenticator App vs Nous Calculator

The clearest difference is in-app purchases: Nous Calculator at none against Authenticator App's 4. Authenticator App's advantage is ads (none vs shown) and iOS requirement (15.0 vs 17.0). On price and device support there is nothing between them.

Both are free to download. Authenticator App sells 4 in-app purchases, starting at $8.99 per month. Nous Calculator asks for nothing beyond the download.

## The numbers

| Metric | Authenticator App | Nous Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3.4K ratings)](https://appshunter.io/ios/app/authenticator-app-authkey/id6447845767/reviews)** | — |
| Number of ratings | **3.4K** | — |
| Positive reviews | 41.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Monthly | — |
| Monetization | Free with in-app purchases | — |
| Size | 46 MB | 4 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [SkyRise Networks](https://appshunter.io/developer/1682862399) | [Takanori Izena](https://appshunter.io/developer/1795178337) |

## What reviewers say

### Authenticator App

[App page](https://appshunter.io/ios/app/authenticator-app-authkey/id6447845767)

Enhance your online security with this app, offering a secure and reliable method to protect your accounts. It generates unique codes for two-factor authentication, ensuring your personal information stays safe.

**Highlights:** Account protection with 2FA, Easy setup and management, Backup and sync accounts, Secure code generation

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Authenticator Monthly Premium | $8.99 | per month |
| Authenticator Weekly Premium | $9.99 | per 7 days |
| Authenticator Yearly Premium | $49.99 | per year |
| Authenticator Lifetime Premium | $69.99 | one-time |

**What reviewers like**

- 👍 Seamless functionality
- 🚀 Quick and easy setup
- 🔒 Robust security features

**What reviewers complain about**

- 🐛 Compatibility issues
- 💰 Expensive subscription
- 🤯 Confusing user interface
- 🔒 Unreliable authentication

**Reported bugs**

- Unable to scan QR codes
- Accounts not showing up correctly
- Repeated login failures

**Requested features**

- Ability to add/manage multiple accounts
- Improved syncing across devices
- More transparent subscription model


### Nous Calculator

[App page](https://appshunter.io/ios/app/nous-calculator/id6758567582)

**In-app purchases:** none


## Frequently asked questions

### Is Authenticator App free?

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

### Is Nous Calculator free?

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

### Do Authenticator App or Nous Calculator have ads?

Nous Calculator shows ads; Authenticator App does not.

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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.*