# Authenticator App vs Secret Diary

The clearest difference is price: Authenticator App at Free against Secret Diary's $0.99. Secret Diary's advantage is in-app purchases (none vs 1) and iOS requirement (15.6 vs 18.0). On ads and device support there is nothing between them.

Authenticator App is free to download; Secret Diary costs $0.99 up front. Authenticator App sells 1 in-app purchase, starting at $6.99 per 7 days. Secret Diary asks for nothing beyond the download.

## The numbers

| Metric | Authenticator App | Secret Diary |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | — | Monthly |
| Size | 15 MB | 8 MB |
| Requires iOS | 18.0 | **15.6** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [Ramol Luts](https://appshunter.io/developer/1837491676) | [景 刘](https://appshunter.io/developer/1887860900) |

## What reviewers say

### Authenticator App

[App page](https://appshunter.io/ios/app/authenticator-app-2fa-code/id6757448414)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly king of Authenticator! | $6.99 | per 7 days |


### Secret Diary

[App page](https://appshunter.io/ios/app/secret-diary-notebook/id6761122036)

**In-app purchases:** none


## Frequently asked questions

### Is Authenticator App free?

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

### Is Secret Diary free?

Secret Diary costs $0.99, with no in-app purchases.

### Do Authenticator App or Secret Diary have ads?

Neither Authenticator App nor Secret Diary 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.*