# 机友计算器pro vs 铅笔画

The clearest difference is iOS requirement: 机友计算器pro at 11.0 against 铅笔画's 14.0. 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 | 机友计算器pro | 铅笔画 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | — |
| Size | 59 MB | 222 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Changsha Fugui Bamboo Network Technology Co., Ltd.](https://appshunter.io/developer/1458061020) | [文利 罗](https://appshunter.io/developer/1743701483) |

## What reviewers say

### 机友计算器pro

[App page](https://appshunter.io/ios/app/pro/id1546706241)

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

**In-app purchases:** none


### 铅笔画

[App page](https://appshunter.io/ios/app/id6504413801)

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

**In-app purchases:** none


## Frequently asked questions

### Is 机友计算器pro free?

机友计算器pro is free to download, with no in-app purchases.

### Is 铅笔画 free?

铅笔画 is free to download, with no in-app purchases.

### Do 机友计算器pro or 铅笔画 have ads?

Neither 机友计算器pro nor 铅笔画 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.*