# Calendar S vs A!sir

The clearest difference is in-app purchases: Calendar S at none against A!sir's 3. Calendar S also leads on iOS requirement (9.0 vs 17.0). A!sir's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. A!sir sells 3 in-app purchases, starting at $0.99 per month. Calendar S asks for nothing beyond the download.

## The numbers

| Metric | Calendar S | A!sir |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/calendar-s-simple-efficient/id1489584166/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | — |
| Monetization | Ad-supported | — |
| Size | 173 MB | 6 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [寅康 童](https://appshunter.io/developer/966263704) | [鸿杰 黄](https://appshunter.io/developer/1797445245) |

## What reviewers say

### Calendar S

[App page](https://appshunter.io/ios/app/calendar-s-simple-efficient/id1489584166)

This app combines a calendar and to-do list for efficient daily organization. It offers features like personalized reminders, a Pomodoro timer, and Ebbinghaus memory curve mode to enhance productivity and focus. The minimalist design ensures a clear and intuitive user experience.

**Highlights:** Integrated calendar and to-do list, Personalized reminder modes, Pomodoro timer with white noise, Ebbinghaus memory curve mode, Minimalist and intuitive design, Automatic event processing, Lunar calendar adaptation

**Features:** Vision Pro support

**In-app purchases:** none


### A!sir

[App page](https://appshunter.io/ios/app/asir-adhd-task-manager/id6758390729)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| A-Sir 月度会员 | $0.99 | per month |
| A-Sir 年度会员 | $4.99 | per year |
| 终身订阅 | $9.99 | one-time |


## Frequently asked questions

### Is Calendar S free?

Calendar S is free to download, with no in-app purchases.

### Is A!sir free?

A!sir is free to download, with in-app purchases available.

### Do Calendar S or A!sir have ads?

Calendar S shows ads; A!sir does not.

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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.*