# 机友计算器pro vs Help Me SOS Alert

The clearest difference is update cadence: Help Me SOS Alert at weekly against 机友计算器pro's every 7 months. 机友计算器pro's advantage is iOS requirement (11.0 vs 13.0). 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.

机友计算器pro ships an update every 7 months, Help Me SOS Alert weekly. The most recent releases landed on October 18, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | 机友计算器pro | Help Me SOS Alert |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Weekly** |
| Size | 59 MB | 23 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Changsha Fugui Bamboo Network Technology Co., Ltd.](https://appshunter.io/developer/1458061020) | [航 王](https://appshunter.io/developer/1895845885) |

## 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


### Help Me SOS Alert

[App page](https://appshunter.io/ios/app/help-me-sos-alert/id6764615620)

**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 Help Me SOS Alert free?

Help Me SOS Alert is free to download, with no in-app purchases.

### Do 机友计算器pro or Help Me SOS Alert have ads?

Neither 机友计算器pro nor Help Me SOS Alert shows ads.

### Which is updated more often, 机友计算器pro or Help Me SOS Alert?

机友计算器pro ships an update every 7 months, and Help Me SOS Alert weekly. Most recently, 机友计算器pro was updated on October 18, 2026 and Help Me SOS Alert on October 6, 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.*