# Calendar. Simple Calendars vs CompisCalculator Pro

The clearest difference is price: CompisCalculator Pro at Free against Calendar. Simple Calendars's $1.99. Calendar. Simple Calendars's advantage is in-app purchases (none vs 1). On rating, ratings volume, update cadence and ads there is nothing between them.

CompisCalculator Pro is free to download; Calendar. Simple Calendars costs $1.99 up front. CompisCalculator Pro sells 1 one-off in-app purchase. Calendar. Simple Calendars asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Calendar. Simple Calendars against 5.0 for CompisCalculator Pro. Both are backed by a comparable volume of ratings — 2 and 3 respectively.

Calendar. Simple Calendars ships an update monthly, CompisCalculator Pro every 3 weeks. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Calendar. Simple Calendars | CompisCalculator Pro |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/calendar-simple-calendars/id934523970/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/compiscalculator-pro/id6451198443/reviews) |
| Number of ratings | 2 | **3** |
| Positive reviews | 70.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 7 MB | 3 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KK FAMILY SOFTWARE LLC](https://appshunter.io/developer/806853000) | [Karl Noreland](https://appshunter.io/developer/1697120498) |

## What reviewers say

### Calendar. Simple Calendars

[App page](https://appshunter.io/ios/app/calendar-simple-calendars/id934523970)

Organize your schedule across Apple devices with a user-friendly interface. Customize with color themes, view week numbers, and use interactive widgets to manage your day, month, and year efficiently.

**Highlights:** Cross-platform sync (Mac, iPhone, iPad), Interactive home screen widget, Customizable color themes, Week number display option, Intuitive user interface

**Features:** Vision Pro support

**In-app purchases:** none


### CompisCalculator Pro

[App page](https://appshunter.io/ios/app/compiscalculator-pro/id6451198443)

A scientific calculator designed to enhance productivity with features like real-time results, unit conversion, and custom buttons. It offers a date calculator, customizable appearance, and is optimized for iPad.

**Highlights:** Real-time calculation results, Integrated unit and currency converter, Customizable buttons and functions, Date and time difference calculator, Calculation history, Customizable appearance, iPad optimization

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CompisCalculator premium | $2.49 | one-time |


## Frequently asked questions

### Is Calendar. Simple Calendars free?

Calendar. Simple Calendars costs $1.99, with no in-app purchases.

### Is CompisCalculator Pro free?

CompisCalculator Pro is free to download, with in-app purchases available.

### Which has better reviews, Calendar. Simple Calendars or CompisCalculator Pro?

Calendar. Simple Calendars and CompisCalculator Pro are both rated 5.0 out of 5 on the App Store, from 2 and 3 ratings respectively.

### Do Calendar. Simple Calendars or CompisCalculator Pro have ads?

Neither Calendar. Simple Calendars nor CompisCalculator Pro shows ads.

### Which is updated more often, Calendar. Simple Calendars or CompisCalculator Pro?

Calendar. Simple Calendars ships an update monthly, and CompisCalculator Pro every 3 weeks. Most recently, Calendar. Simple Calendars was updated on October 22, 2026 and CompisCalculator Pro on October 24, 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.*