# COMP Odour Survey vs BarCrv

The clearest difference is iOS requirement: BarCrv at 10.0 against COMP Odour Survey's 15.6. 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.

## The numbers

| Metric | COMP Odour Survey | BarCrv |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | — |
| Monetization | Free | — |
| Size | 45 MB | 32 MB |
| Requires iOS | 15.6 | **10.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Wood Buffalo Environmental Association](https://appshunter.io/developer/1281094252) | [奇 林](https://appshunter.io/developer/1533572881) |

## What reviewers say

### COMP Odour Survey

[App page](https://appshunter.io/ios/app/comp-odour-survey/id1281094253)

This app allows the public to report odour events in the Wood Buffalo region. The collected anonymous data helps researchers understand the relationship between odours and ambient air quality, complementing official monitoring station data.

**Highlights:** Anonymous odour reporting, Contributes to air quality research, Data complements monitoring stations, Supports Wood Buffalo Environmental Association, Community participation in environmental monitoring

**Features:** macOS Compatibility

**In-app purchases:** none


### BarCrv

[App page](https://appshunter.io/ios/app/barcrv/id1540047225)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is COMP Odour Survey free?

COMP Odour Survey is free to download, with no in-app purchases.

### Is BarCrv free?

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

### Do COMP Odour Survey or BarCrv have ads?

Neither COMP Odour Survey nor BarCrv shows ads.

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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.*