# Static Pressure & Duct Check vs NESM Tools

Static Pressure & Duct Check and NESM Tools are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Static Pressure & Duct Check ships an update fortnightly, NESM Tools every 3 weeks. Both last shipped on October 31, 2026.

## The numbers

| Metric | Static Pressure & Duct Check | NESM Tools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/static-pressure-and-duct-check/id6786886923/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Free | — |
| Size | 33 MB | 50 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Mike Watson](https://appshunter.io/developer/1848411021) | [Craig Danby](https://appshunter.io/developer/6795641237) |

## What reviewers say

### Static Pressure & Duct Check

[App page](https://appshunter.io/ios/app/static-pressure-and-duct-check/id6786886923)

This utility app provides HVAC professionals with tools for duct sizing and field checks based on ACCA Manual D methods. It offers quick calculations for duct size, friction rate, velocity, and static pressure, all while prioritizing user privacy and offline functionality.

**Highlights:** Quick duct sizing (round/rectangular), Duct friction rate and velocity checks, Static pressure calculations, Offline functionality, No account or tracking required, Plausibility checks for inputs

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

**In-app purchases:** none


### NESM Tools

[App page](https://appshunter.io/ios/app/nesm-tools/id6795933641)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Static Pressure & Duct Check free?

Static Pressure & Duct Check is free to download, with no in-app purchases.

### Is NESM Tools free?

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

### Do Static Pressure & Duct Check or NESM Tools have ads?

Neither Static Pressure & Duct Check nor NESM Tools shows ads.

### Which is updated more often, Static Pressure & Duct Check or NESM Tools?

Static Pressure & Duct Check ships an update fortnightly, and NESM Tools every 3 weeks. Most recently, Static Pressure & Duct Check was updated on October 31, 2026 and NESM Tools on October 31, 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.*