# RAI4 group vs Cave Note

The clearest difference is in-app purchases: RAI4 group at none against Cave Note's 2. RAI4 group also leads on iOS requirement (12.0 vs 16.4). Cave Note's advantage is update cadence (every 2 days vs every 28 months). On price, ads and device support there is nothing between them.

Both are free to download. Cave Note sells 2 in-app purchases, starting at $3.99 per month. RAI4 group asks for nothing beyond the download.

RAI4 group ships an update every 28 months, Cave Note every 2 days. The most recent releases landed on November 6, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | RAI4 group | Cave Note |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 28 months | **Every 2 days** |
| Size | 14 MB | 152 MB |
| Requires iOS | **12.0** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [Appzone Corporation](https://appshunter.io/developer/551373559) | [Esquisse Works](https://appshunter.io/developer/6788709025) |

## What reviewers say

### RAI4 group

[App page](https://appshunter.io/ios/app/rai4-group/id1237452956)

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

**In-app purchases:** none


### Cave Note

[App page](https://appshunter.io/ios/app/cave-note-ai-wine-journal/id6802314358)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアム（月額） | $3.99 | per month |
| プレミアム（年額） | $39.99 | per year |


## Frequently asked questions

### Is RAI4 group free?

RAI4 group is free to download, with no in-app purchases.

### Is Cave Note free?

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

### Do RAI4 group or Cave Note have ads?

Neither RAI4 group nor Cave Note shows ads.

### Which is updated more often, RAI4 group or Cave Note?

RAI4 group ships an update every 28 months, and Cave Note every 2 days. Most recently, RAI4 group was updated on November 6, 2026 and Cave Note on November 10, 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.*