# ZionTech vs SOS

The clearest difference is device support: ZionTech at 3 against SOS's 1. ZionTech also leads on iOS requirement (15.0 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 3, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | ZionTech | SOS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Size | 33 MB | 6 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Otavio Garrido](https://appshunter.io/developer/1781054761) | [Orlando Costa](https://appshunter.io/developer/6780307902) |

## What reviewers say

### ZionTech

[App page](https://appshunter.io/ios/app/ziontech/id6760720074)

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

**In-app purchases:** none


### SOS

[App page](https://appshunter.io/ios/app/sos-global/id6780307900)

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

**In-app purchases:** none


## Frequently asked questions

### Is ZionTech free?

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

### Is SOS free?

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

### Do ZionTech or SOS have ads?

Neither ZionTech nor SOS shows ads.

### Which is updated more often, ZionTech or SOS?

ZionTech ships an update every 3 weeks, and SOS every 3 weeks. Most recently, ZionTech was updated on October 3, 2026 and SOS on October 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*