# Regular Expression Test vs Mind Palace

The clearest difference is in-app purchases: Regular Expression Test at none against Mind Palace's 2. Regular Expression Test also leads on ads (none vs shown) and iOS requirement (14.0 vs 17.0). Mind Palace's advantage is update cadence (every 2 weeks vs every 49 months). On price and device support there is nothing between them.

Both are free to download. Mind Palace sells 2 in-app purchases, starting at $2.99 per month. Regular Expression Test asks for nothing beyond the download.

Regular Expression Test ships an update every 49 months, Mind Palace every 2 weeks. The most recent releases landed on October 6, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Regular Expression Test | Mind Palace |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 49 months | **Every 2 weeks** |
| Size | 0 MB | 19 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SHIN INABA](https://appshunter.io/developer/800415932) | [鹏 陈](https://appshunter.io/developer/1842577800) |

## What reviewers say

### Regular Expression Test

[App page](https://appshunter.io/ios/app/regular-expression-test/id800415929)

**Features:** macOS Compatibility

**In-app purchases:** none


### Mind Palace

[App page](https://appshunter.io/ios/app/mind-palace-spatial-memory/id6768951349)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro - Monthly | $2.99 | per month |
| Pro - Yearly | $19.99 | per year |


## Frequently asked questions

### Is Regular Expression Test free?

Regular Expression Test is free to download, with no in-app purchases.

### Is Mind Palace free?

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

### Do Regular Expression Test or Mind Palace have ads?

Mind Palace shows ads; Regular Expression Test does not.

### Which is updated more often, Regular Expression Test or Mind Palace?

Regular Expression Test ships an update every 49 months, and Mind Palace every 2 weeks. Most recently, Regular Expression Test was updated on October 6, 2026 and Mind Palace on October 1, 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.*