# Secret Diary vs Horizontal PCB

The clearest difference is in-app purchases: Horizontal PCB at none against Secret Diary's 1. Horizontal PCB also leads on update cadence (every 5 days vs every 3 months). Secret Diary's advantage is iOS requirement (15 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Secret Diary sells 1 one-off in-app purchase. Horizontal PCB asks for nothing beyond the download.

Secret Diary ships an update every 3 months, Horizontal PCB every 5 days. The most recent releases landed on October 7, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Secret Diary | Horizontal PCB |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/secret-diary-password-notes/id6445909382/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 70.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 66 MB | 33 MB |
| Requires iOS | **15** | 26.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [伟 葛](https://appshunter.io/developer/1028908732) | [Twarge LLC](https://appshunter.io/developer/6781456673) |

## What reviewers say

### Secret Diary

[App page](https://appshunter.io/ios/app/secret-diary-password-notes/id6445909382)

Securely record your daily life and protect your privacy with this easy-to-use digital journal. Customize entries with beautiful fonts and quickly find past notes using content search. It offers password protection for exclusive access.

**Highlights:** Password protection, Secure diary entries, Customizable fonts, Content search, User-friendly interface, Privacy protection

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Premium | $2.99 | one-time |


### Horizontal PCB

[App page](https://appshunter.io/ios/app/horizontal-pcb/id6781505835)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Secret Diary free?

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

### Is Horizontal PCB free?

Horizontal PCB is free to download, with no in-app purchases.

### Do Secret Diary or Horizontal PCB have ads?

Neither Secret Diary nor Horizontal PCB shows ads.

### Which is updated more often, Secret Diary or Horizontal PCB?

Secret Diary ships an update every 3 months, and Horizontal PCB every 5 days. Most recently, Secret Diary was updated on October 7, 2026 and Horizontal PCB on October 21, 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.*