# Secret Diary with Locks vs Shield

The clearest difference is price: Secret Diary with Locks at Free against Shield's $0.99. Secret Diary with Locks also leads on iOS requirement (16.0 vs 26.0). Shield's advantage is review sentiment (90% vs 50%) and in-app purchases (none vs 1). On ads and device support there is nothing between them.

Secret Diary with Locks is free to download; Shield costs $0.99 up front. Secret Diary with Locks sells 1 in-app purchase, starting at $0.99 per year. Shield asks for nothing beyond the download.

Secret Diary with Locks ships an update every 3 months, Shield every 3 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Secret Diary with Locks | Shield |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | — | **[4.4 (8 ratings)](https://appshunter.io/ios/app/shield-spam-text-filter/id6503194185/reviews)** |
| Number of ratings | — | **8** |
| Positive reviews | 50.0% of reviews | **90.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 10 MB | 8 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Harshad Jadav](https://appshunter.io/developer/1687259507) | [TRILLIWON, Co.](https://appshunter.io/developer/1050731374) |

## 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 |


### Shield

[App page](https://appshunter.io/ios/app/shield-spam-text-filter/id6503194185)

This utility app uses AI to filter and categorize SMS messages, blocking spam and organizing your inbox. It offers customizable filters and a privacy-first approach to keep your communications clean and secure.

**Highlights:** AI-driven spam filtering, Privacy-first data handling, Unlimited customizable filters, Intelligent message categorization, Easy setup and user-friendly interface

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

**In-app purchases:** none


## Frequently asked questions

### Is Secret Diary with Locks free?

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

### Is Shield free?

Shield costs $0.99, with no in-app purchases.

### Do Secret Diary with Locks or Shield have ads?

Neither Secret Diary with Locks nor Shield shows ads.

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

Secret Diary with Locks ships an update every 3 months, and Shield every 3 weeks. Most recently, Secret Diary with Locks was updated on October 25, 2026 and Shield on October 24, 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.*