# ProCalc+ vs 99캘린더

The clearest difference is price: ProCalc+ at Free against 99캘린더's $1.99. ProCalc+ also leads on device support (3 vs 1) and iOS requirement (12.0 vs 17.0). On ads and in-app purchases there is nothing between them.

ProCalc+ is free to download; 99캘린더 costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | ProCalc+ | 99캘린더 |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/procalc-plus/id6744267184/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 4 days |
| Monetization | Free | — |
| Size | 28 MB | 5 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Rachit Agarwal](https://appshunter.io/developer/1750646094) | [HWAN LEE](https://appshunter.io/developer/1867174500) |

## What reviewers say

### ProCalc+

[App page](https://appshunter.io/ios/app/procalc-plus/id6744267184)

This advanced calculator app offers a wide range of functions for students, engineers, and daily math needs. It features trigonometric, exponential, and logarithmic capabilities, along with a history memory and customizable themes. The app works offline and provides instant, accurate results.

**Highlights:** Advanced scientific functions, Calculation history memory, Clean and fast interface, Customizable themes, Offline functionality, Instant results

**Features:** macOS Compatibility

**In-app purchases:** none


### 99캘린더

[App page](https://appshunter.io/ios/app/99/id6760467468)

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

**In-app purchases:** none


## Frequently asked questions

### Is ProCalc+ free?

ProCalc+ is free to download, with no in-app purchases.

### Is 99캘린더 free?

99캘린더 costs $1.99, with no in-app purchases.

### Do ProCalc+ or 99캘린더 have ads?

Neither ProCalc+ nor 99캘린더 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.*