# Authenticator App vs Otto AI

The clearest difference is update cadence: Otto AI at weekly against Authenticator App's monthly. Authenticator App's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Authenticator App sells 1 in-app purchase, starting at $2.00 per month and Otto AI sells 6 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Authenticator App ships an update monthly, Otto AI weekly. The most recent releases landed on October 2, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Authenticator App | Otto AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/authenticator-app-2fa-pro/id6448697938/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 59 MB | 12 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Denis Vithani](https://appshunter.io/developer/1611512969) | [Arghyadeep Karmakar](https://appshunter.io/developer/6790373278) |

## What reviewers say

### Authenticator App

[App page](https://appshunter.io/ios/app/authenticator-app-2fa-pro/id6448697938)

This app provides two-factor authentication by generating time-based one-time passwords (TOTP) and push authentication. It adds an extra layer of security to your online accounts by creating unique codes that help protect against unauthorized access.

**Highlights:** Two-factor authentication, TOTP & HOTP token generation, 30 & 60 second tokens, QR code scanner, Password protection for tokens, No internet connection required for codes

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Authenticator Subscription | $2.00 | per month |


### Otto AI

[App page](https://appshunter.io/ios/app/otto-ai-email-assistant/id6790373276)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Otto Plus | $1.99 | per 7 days |
| Otto Plus | $4.99 | per month |
| Otto Pro | $5.99 | per 7 days |
| Otto Pro | $14.99 | per month |
| Otto Plus | $39.99 | per year |
| Otto Pro | $119.99 | per year |


## Frequently asked questions

### Is Authenticator App free?

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

### Is Otto AI free?

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

### Do Authenticator App or Otto AI have ads?

Neither Authenticator App nor Otto AI shows ads.

### Which is updated more often, Authenticator App or Otto AI?

Authenticator App ships an update monthly, and Otto AI weekly. Most recently, Authenticator App was updated on October 2, 2026 and Otto AI on October 14, 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.*