# Directional Survey Methods vs COMP Odour Survey

The clearest difference is update cadence: COMP Odour Survey at every 6 months against Directional Survey Methods's every 50 months. Directional Survey Methods's advantage is iOS requirement (12.0 vs 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.

Directional Survey Methods ships an update every 50 months, COMP Odour Survey every 6 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Directional Survey Methods | COMP Odour Survey |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 50 months | **Every 6 months** |
| Monetization | — | Free |
| Size | 7 MB | 45 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Carlos Moura](https://appshunter.io/developer/407501202) | [Wood Buffalo Environmental Association](https://appshunter.io/developer/1281094252) |

## What reviewers say

### Directional Survey Methods

[App page](https://appshunter.io/ios/app/directional-survey-methods/id1130800392)

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Directional Survey Methods free?

Directional Survey Methods is free to download, with no in-app purchases.

### Is COMP Odour Survey free?

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

### Do Directional Survey Methods or COMP Odour Survey have ads?

Neither Directional Survey Methods nor COMP Odour Survey shows ads.

### Which is updated more often, Directional Survey Methods or COMP Odour Survey?

Directional Survey Methods ships an update every 50 months, and COMP Odour Survey every 6 months. Most recently, Directional Survey Methods was updated on November 2, 2026 and COMP Odour Survey on November 3, 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.*