# Mind Palace vs Marrow Calendar

The clearest difference is ads: Marrow Calendar at none against Mind Palace's shown. Marrow Calendar also leads on update cadence (every 2 days vs weekly). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Mind Palace sells 2 in-app purchases, starting at $2.99 per month and Marrow Calendar sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Mind Palace ships an update weekly, Marrow Calendar every 2 days. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Mind Palace | Marrow Calendar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Weekly | **Every 2 days** |
| Size | 36 MB | 10 MB |
| Requires iOS | **17.6** | 18.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [OKAN KAYA](https://appshunter.io/developer/1780559075) | [Mikel Albistegui Aguirre](https://appshunter.io/developer/6809845519) |

## What reviewers say

### Mind Palace

[App page](https://appshunter.io/ios/app/mind-palace-memorize-and-study/id6739449718)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $2.99 | per month |
| Monthly Premium Subscription | $2.99 | per month |


### Marrow Calendar

[App page](https://appshunter.io/ios/app/marrow-calendar/id6809845517)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Marrow Plus | $3.99 | one-time |


## Frequently asked questions

### Is Mind Palace free?

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

### Is Marrow Calendar free?

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

### Do Mind Palace or Marrow Calendar have ads?

Mind Palace shows ads; Marrow Calendar does not.

### Which is updated more often, Mind Palace or Marrow Calendar?

Mind Palace ships an update weekly, and Marrow Calendar every 2 days. Most recently, Mind Palace was updated on November 8, 2026 and Marrow Calendar on October 31, 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.*