# Authenticator App vs ZETIT Key

The clearest difference is in-app purchases: ZETIT Key at none against Authenticator App's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Authenticator App sells 1 in-app purchase, starting at $3.99 per 7 days. ZETIT Key asks for nothing beyond the download.

Authenticator App ships an update every 6 weeks, ZETIT Key every 2 months. The most recent releases landed on October 13, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Authenticator App | ZETIT Key |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Size | 17 MB | 20 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Denis Kondratovich](https://appshunter.io/developer/1380754085) | [ZETIT](https://appshunter.io/developer/1894262387) |

## What reviewers say

### Authenticator App

[App page](https://appshunter.io/ios/app/authenticator-app-2fa-mfa/id6744153953)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $3.99 | per 7 days |


### ZETIT Key

[App page](https://appshunter.io/ios/app/zetit-key/id6762467691)

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

**In-app purchases:** none


## Frequently asked questions

### Is Authenticator App free?

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

### Is ZETIT Key free?

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

### Do Authenticator App or ZETIT Key have ads?

Neither Authenticator App nor ZETIT Key shows ads.

### Which is updated more often, Authenticator App or ZETIT Key?

Authenticator App ships an update every 6 weeks, and ZETIT Key every 2 months. Most recently, Authenticator App was updated on October 13, 2026 and ZETIT Key on October 2, 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.*