# GP NOVA gas detector vs AppyDog

The clearest difference is update cadence: AppyDog at every 3 weeks 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, AppyDog every 3 weeks. The most recent releases landed on October 25, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | GP NOVA gas detector | AppyDog |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 27 months | **Every 3 weeks** |
| Size | 65 MB | 22 MB |
| Requires iOS | **14.2** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Geopal](https://appshunter.io/developer/1573577681) | [Nikhil Subash Chander Goel](https://appshunter.io/developer/1085984888) |

## 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


### AppyDog

[App page](https://appshunter.io/ios/app/appydog/id6447688766)

**Features:** macOS Compatibility

**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 AppyDog free?

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

### Do GP NOVA gas detector or AppyDog have ads?

Neither GP NOVA gas detector nor AppyDog shows ads.

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

GP NOVA gas detector ships an update every 27 months, and AppyDog every 3 weeks. Most recently, GP NOVA gas detector was updated on October 25, 2026 and AppyDog on October 14, 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.*