# Secret Diary with Locks vs Security Master

The clearest difference is ads: Secret Diary with Locks at none against Security Master's shown. Security Master's advantage is update cadence (every 11 days vs every 3 months). On price, review sentiment, in-app purchases and monetization model there is nothing between them.

Both are free to download. Secret Diary with Locks sells 1 in-app purchase, starting at $0.99 per year and Security Master sells 2 in-app purchases, starting at $8.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Secret Diary with Locks ships an update every 3 months, Security Master every 11 days. The most recent releases landed on August 23, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Secret Diary with Locks | Security Master |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (4K ratings)](https://appshunter.io/ios/app/security-master-data-privacy/id6504529234/reviews)** |
| Number of ratings | — | **4K** |
| Positive reviews | 50.0% of reviews | **55.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 11 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 10 MB | 20 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Harshad Jadav](https://appshunter.io/developer/1687259507) | [Mobiwave Limited](https://appshunter.io/developer/1752684803) |

## What reviewers say

### 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 |


### Security Master

[App page](https://appshunter.io/ios/app/security-master-data-privacy/id6504529234)

Protect your personal information and enhance your online activity. This app offers privacy checks, data leak alerts, secure storage for sensitive files, and a protected browsing experience. Keep your digital life safe and your browsing uninterrupted.

**Highlights:** Privacy Checkup, Data Leaks Check, Safe Storage for Files, Secure Browser, Malicious Sites Blocking, Tracker and Ad Blocking

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Trial Premium Weekly | $8.99 | per 7 days |
| Premium Yearly | $49.99 | per year |

**What reviewers like**

- 🚀 Fast app
- 🔒 Provides security
- 👍 Helpful app

**What reviewers complain about**

- 🐛 Bugs and glitches
- 💰 Paid subscription
- 🤔 Confusing for some users

**Reported bugs**

- Login issues
- Compatibility problems

**Requested features**

- More help and guidance for users
- Free trial period


## Frequently asked questions

### Is Secret Diary with Locks free?

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

### Is Security Master free?

Security Master is free to download, with in-app purchases available.

### Do Secret Diary with Locks or Security Master have ads?

Security Master shows ads; Secret Diary with Locks does not.

### Which is updated more often, Secret Diary with Locks or Security Master?

Secret Diary with Locks ships an update every 3 months, and Security Master every 11 days. Most recently, Secret Diary with Locks was updated on August 23, 2026 and Security Master on September 25, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*