# Pneumatic Workflow vs CalcEngineer

The clearest difference is ads: CalcEngineer at none against Pneumatic Workflow's shown. CalcEngineer also leads on update cadence (every 2 days vs every 18 months). Pneumatic Workflow's advantage is iOS requirement (15.1 vs 17). On price, 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.

Pneumatic Workflow ships an update every 18 months, CalcEngineer every 2 days. The most recent releases landed on September 22, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Pneumatic Workflow | CalcEngineer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/calcengineer/id6748969344/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 18 months | **Every 2 days** |
| Monetization | — | Free |
| Size | 31 MB | 10 MB |
| Requires iOS | **15.1** | 17 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [Pneumatic Software Inc.](https://appshunter.io/developer/1618358218) | [Justin Bush](https://appshunter.io/developer/1828308327) |

## What reviewers say

### Pneumatic Workflow

[App page](https://appshunter.io/ios/app/pneumatic-workflow/id1618369634)

**In-app purchases:** none


### CalcEngineer

[App page](https://appshunter.io/ios/app/calcengineer/id6748969344)

This app provides professional engineering calculations for compressed air systems. It helps engineers and technicians determine CFM requirements, size compressors and tanks, and analyze pressure drops for optimized pneumatic systems.

**Highlights:** CFM Calculator, Compressor & Tank Sizing, Pressure Drop Analysis, Flow Velocity & Pipe Sizing, Multiple CFM Entries, General Engineering Calculator Suite

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Pneumatic Workflow free?

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

### Is CalcEngineer free?

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

### Do Pneumatic Workflow or CalcEngineer have ads?

Pneumatic Workflow shows ads; CalcEngineer does not.

### Which is updated more often, Pneumatic Workflow or CalcEngineer?

Pneumatic Workflow ships an update every 18 months, and CalcEngineer every 2 days. Most recently, Pneumatic Workflow was updated on September 22, 2026 and CalcEngineer on September 12, 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.*