# My Secret Diary (Images) vs CATS Input Method Pro

The clearest difference is in-app purchases: CATS Input Method Pro at none against My Secret Diary (Images)'s 1. My Secret Diary (Images)'s advantage is update cadence (every 5 months vs every 24 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. My Secret Diary (Images) sells 1 one-off in-app purchase. CATS Input Method Pro asks for nothing beyond the download.

My Secret Diary (Images) ships an update every 5 months, CATS Input Method Pro every 24 months. The most recent releases landed on November 1, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | My Secret Diary (Images) | CATS Input Method Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 24 months |
| Size | 4 MB | 7 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [F&E System Apps](https://appshunter.io/developer/371919430) | [YIU LEUNG RANDY CHAN](https://appshunter.io/developer/1474191447) |

## What reviewers say

### My Secret Diary (Images)

[App page](https://appshunter.io/ios/app/my-secret-diary-images/id472881073)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $4.99 | one-time |


### CATS Input Method Pro

[App page](https://appshunter.io/ios/app/cats-input-method-pro/id1523143711)

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

**In-app purchases:** none


## Frequently asked questions

### Is My Secret Diary (Images) free?

My Secret Diary (Images) is free to download, with in-app purchases available.

### Is CATS Input Method Pro free?

CATS Input Method Pro is free to download, with no in-app purchases.

### Do My Secret Diary (Images) or CATS Input Method Pro have ads?

Neither My Secret Diary (Images) nor CATS Input Method Pro shows ads.

### Which is updated more often, My Secret Diary (Images) or CATS Input Method Pro?

My Secret Diary (Images) ships an update every 5 months, and CATS Input Method Pro every 24 months. Most recently, My Secret Diary (Images) was updated on November 1, 2026 and CATS Input Method Pro on October 29, 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.*