# Mental Map vs Penguin’s Diary

The clearest difference is in-app purchases: Penguin’s Diary at none against Mental Map's 2. Mental Map's advantage is ads (none vs shown) and iOS requirement (13.0 vs 18.6). On price, update cadence and device support there is nothing between them.

Both are free to download. Mental Map sells 2 in-app purchases, starting at $3.99 per month. Penguin’s Diary asks for nothing beyond the download.

Mental Map ships an update weekly, Penguin’s Diary every 4 days. The most recent releases landed on July 17, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Mental Map | Penguin’s Diary |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Weekly | **Every 4 days** |
| Size | 42 MB | 7 MB |
| Requires iOS | **13.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Alexandr Arshinov](https://appshunter.io/developer/1701780400) | [Dogukan KOCAK](https://appshunter.io/developer/1712033471) |

## What reviewers say

### Mental Map

[App page](https://appshunter.io/ios/app/mental-map/id6754384719)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Features (1 month) | $3.99 | per month |
| Pro Features (1 year) | $29.99 | per year |


### Penguin’s Diary

[App page](https://appshunter.io/ios/app/penguins-diary/id6767078648)

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

**In-app purchases:** none


## Frequently asked questions

### Is Mental Map free?

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

### Is Penguin’s Diary free?

Penguin’s Diary is free to download, with no in-app purchases.

### Do Mental Map or Penguin’s Diary have ads?

Penguin’s Diary shows ads; Mental Map does not.

### Which is updated more often, Mental Map or Penguin’s Diary?

Mental Map ships an update weekly, and Penguin’s Diary every 4 days. Most recently, Mental Map was updated on July 17, 2026 and Penguin’s Diary on September 14, 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.*