# Authenticator App vs Secret Diary with Locks

The clearest difference is update cadence: Authenticator App at every 3 weeks against Secret Diary with Locks's every 3 months. Authenticator App also leads on iOS requirement (12.0 vs 16.0). Secret Diary with Locks's advantage is review sentiment (50% vs 41%). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Authenticator App sells 3 in-app purchases, starting at $8.99 per month and Secret Diary with Locks sells 1 in-app purchase, starting at $0.99 per year. Whichever you choose, the download price is not the number that matters.

Authenticator App ships an update every 3 weeks, Secret Diary with Locks every 3 months. The most recent releases landed on September 29, 2026 and August 23, 2026 respectively.

## The numbers

| Metric | Authenticator App | Secret Diary with Locks |
| --- | --- | --- |
| 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 | 40.5% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 49 MB | 10 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [SkyRise Networks](https://appshunter.io/developer/1682862399) | [Harshad Jadav](https://appshunter.io/developer/1687259507) |

## 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 (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Authenticator Monthly Premium | $8.99 | per month |
| Authenticator Yearly Premium | $49.99 | per year |
| Authenticator Lifetime Premium | $49.99 | 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


### Secret Diary with Locks

[App page](https://appshunter.io/ios/app/secret-diary-with-locks/id6449743044)

Securely record your thoughts, memories, and personal moments with this private journal app. Protect your entries with a password, PIN, or biometric authentication. All data is stored locally and encrypted for complete privacy.

**Highlights:** Password, PIN, or biometric unlock, AES 256-bit encryption, Offline local storage, Unlimited entries, Advanced search, No internet permission

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Ad-Free - Annual | $0.99 | per year |


## Frequently asked questions

### Is Authenticator App free?

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

### Is Secret Diary with Locks free?

Secret Diary with Locks is free to download, with in-app purchases available.

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

Neither Authenticator App nor Secret Diary with Locks shows ads.

### Which is updated more often, Authenticator App or Secret Diary with Locks?

Authenticator App ships an update every 3 weeks, and Secret Diary with Locks every 3 months. Most recently, Authenticator App was updated on September 29, 2026 and Secret Diary with Locks on August 23, 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.*