# GP NOVA gas detector vs Jar Tech

The clearest difference is update cadence: Jar Tech at monthly against GP NOVA gas detector's every 27 months. 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.

GP NOVA gas detector ships an update every 27 months, Jar Tech monthly. The most recent releases landed on October 4, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | GP NOVA gas detector | Jar Tech |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 27 months | **Monthly** |
| Size | 65 MB | 23 MB |
| Requires iOS | 14.2 | **13.4** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Geopal](https://appshunter.io/developer/1573577681) | [JAR Tracking Limited](https://appshunter.io/developer/1616615299) |

## What reviewers say

### GP NOVA gas detector

[App page](https://appshunter.io/ios/app/gp-nova-gas-detector/id1573577679)

**Features:** macOS Compatibility

**In-app purchases:** none


### Jar Tech

[App page](https://appshunter.io/ios/app/jar-tech/id6478599780)

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

**In-app purchases:** none


## Frequently asked questions

### Is GP NOVA gas detector free?

GP NOVA gas detector is free to download, with no in-app purchases.

### Is Jar Tech free?

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

### Do GP NOVA gas detector or Jar Tech have ads?

Neither GP NOVA gas detector nor Jar Tech shows ads.

### Which is updated more often, GP NOVA gas detector or Jar Tech?

GP NOVA gas detector ships an update every 27 months, and Jar Tech monthly. Most recently, GP NOVA gas detector was updated on October 4, 2026 and Jar Tech on September 19, 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.*