# 스마트 가스 스니퍼 vs GTG Device Manager

The clearest difference is update cadence: 스마트 가스 스니퍼 at every 3 weeks against GTG Device Manager's every 2 months. 스마트 가스 스니퍼 also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

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

스마트 가스 스니퍼 ships an update every 3 weeks, GTG Device Manager every 2 months. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 스마트 가스 스니퍼 | GTG Device Manager |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free | — |
| Size | 33 MB | 11 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [NodeTalks](https://appshunter.io/developer/1499948406) | [senko inc.,](https://appshunter.io/developer/1439414569) |

## What reviewers say

### 스마트 가스 스니퍼

[App page](https://appshunter.io/ios/app/o2-co-h2s/id1517357092)

This app connects to a G-Tag device to display real-time gas levels for O2, CO, and H2S. It provides alerts for dangerous situations, logs alarm history with location data, and allows emergency contact notifications. The app runs in the background for continuous monitoring.

**Highlights:** Real-time O2, CO, H2S gas level display, Connects with G-Tag device, Emergency contact notifications, Alarm history with location logging, Background operation for continuous monitoring, Battery level indicator

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

**In-app purchases:** none


### GTG Device Manager

[App page](https://appshunter.io/ios/app/gtg-device-manager/id6463708321)

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

**In-app purchases:** none


## Frequently asked questions

### Is 스마트 가스 스니퍼 free?

스마트 가스 스니퍼 is free to download, with no in-app purchases.

### Is GTG Device Manager free?

GTG Device Manager is free to download, with no in-app purchases.

### Do 스마트 가스 스니퍼 or GTG Device Manager have ads?

Neither 스마트 가스 스니퍼 nor GTG Device Manager shows ads.

### Which is updated more often, 스마트 가스 스니퍼 or GTG Device Manager?

스마트 가스 스니퍼 ships an update every 3 weeks, and GTG Device Manager every 2 months. Most recently, 스마트 가스 스니퍼 was updated on October 29, 2026 and GTG Device Manager on October 30, 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.*