# Plain CALENDAR_ vs AI Private Notes

The clearest difference is iOS requirement: Plain CALENDAR_ at 16.0 against AI Private Notes's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Plain CALENDAR_ | AI Private Notes |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 days | — |
| Size | 107 MB | 56 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Hyobeom Han](https://appshunter.io/developer/1739693153) | [Preston Lau](https://appshunter.io/developer/1857923314) |

## What reviewers say

### Plain CALENDAR_

[App page](https://appshunter.io/ios/app/plain-calendar/id6523414947)

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

**In-app purchases:** none


### AI Private Notes

[App page](https://appshunter.io/ios/app/ai-private-notes/id6756007414)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Plain CALENDAR_ free?

Plain CALENDAR_ is free to download, with no in-app purchases.

### Is AI Private Notes free?

AI Private Notes is free to download, with no in-app purchases.

### Do Plain CALENDAR_ or AI Private Notes have ads?

Neither Plain CALENDAR_ nor AI Private Notes shows ads.

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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.*