# GhostDiary vs KnowMe (Simple Diary App)

The clearest difference is in-app purchases: KnowMe (Simple Diary App) at none against GhostDiary's 10. KnowMe (Simple Diary App) also leads on iOS requirement (13.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. GhostDiary sells 10 in-app purchases, starting at $29.99 per year. KnowMe (Simple Diary App) asks for nothing beyond the download.

GhostDiary ships an update every 3 weeks, KnowMe (Simple Diary App) every 4 weeks. The most recent releases landed on November 7, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | GhostDiary | KnowMe (Simple Diary App) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (181 ratings)](https://appshunter.io/ios/app/ghostdiary-mood-daily-diary/id6453941969/reviews)** | — |
| Number of ratings | **181** | — |
| Positive reviews | 87.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 92 MB | 65 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yoonjik Cho](https://appshunter.io/developer/1699502339) | [Hojun Choi](https://appshunter.io/developer/1878642744) |

## What reviewers say

### GhostDiary

[App page](https://appshunter.io/ios/app/ghostdiary-mood-daily-diary/id6453941969)

Easily record your daily life and emotions with cute ghost characters. Track your mood, organize entries by emotion or theme, and gain insights into what affects your feelings. Features include password protection and daily fortune cookies for mindfulness.

**Highlights:** Mood tracking with ghost characters, Daily diary entries with icons and photos, Emotional statistics and analysis, Categorized memos and diaries, Daily fortune cookies for mindfulness, Password protection for privacy, Customizable design themes

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| free-ads-year | $29.99 | per year |
| sky background | $1.29 | one-time |
| Ghostdog | $1.49 | one-time |
| GhostBear | $1.49 | one-time |
| Ghost Astronaut | $1.49 | one-time |
| Notebook ghost | $1.49 | one-time |
| FlowerGhost | $1.49 | one-time |
| Graduated ghost | $1.49 | one-time |
| Big Eyed Ghost | $1.49 | one-time |
| Skinny Ghost | $1.49 | one-time |


### KnowMe (Simple Diary App)

[App page](https://appshunter.io/ios/app/knowme-simple-diary-app/id6759447208)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is GhostDiary free?

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

### Is KnowMe (Simple Diary App) free?

KnowMe (Simple Diary App) is free to download, with no in-app purchases.

### Do GhostDiary or KnowMe (Simple Diary App) have ads?

Neither GhostDiary nor KnowMe (Simple Diary App) shows ads.

### Which is updated more often, GhostDiary or KnowMe (Simple Diary App)?

GhostDiary ships an update every 3 weeks, and KnowMe (Simple Diary App) every 4 weeks. Most recently, GhostDiary was updated on November 7, 2026 and KnowMe (Simple Diary App) on November 9, 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.*