# Pneumatics vs PHD Actuator Sizing

Pneumatics and PHD Actuator Sizing are too close to call on the numbers: across 7 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.

Pneumatics ships an update monthly, PHD Actuator Sizing every 3 weeks. The most recent releases landed on June 5, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Pneumatics | PHD Actuator Sizing |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/phd-actuator-sizing/id6759474917/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 4 MB | 1 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Amnaj Sriwilai](https://appshunter.io/developer/1241468165) | [Krishna Meruva](https://appshunter.io/developer/1864409993) |

## What reviewers say

### Pneumatics

[App page](https://appshunter.io/ios/app/pneumatics/id1241653182)

This app offers essential calculation tools for pneumatic systems, aiding in automation system design and equipment selection. It helps users determine cylinder force, speed, air consumption, and estimate costs, streamlining work with pneumatic components.

**Highlights:** Cylinder force calculation, Force requirement estimation, Cylinder speed calculation, Air consumption calculation, Shock absorber analysis, Pressure and flow rate conversion, Hose diameter and piston rod diameter definition

**In-app purchases:** none


### PHD Actuator Sizing

[App page](https://appshunter.io/ios/app/phd-actuator-sizing/id6759474917)

This engineering tool helps automation professionals quickly size servo motors for industrial applications. It allows users to input motion profiles and automatically calculates torque and inertia for accurate motor selection. Generate detailed reports and verify performance against motor specifications.

**Highlights:** Select from full actuator lineup, Input motion profiles, Automatic RMS torque calculations, Inertia ratio verification, Peak torque and speed checks, Exportable sizing reports

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Pneumatics free?

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

### Is PHD Actuator Sizing free?

PHD Actuator Sizing is free to download, with no in-app purchases.

### Do Pneumatics or PHD Actuator Sizing have ads?

Neither Pneumatics nor PHD Actuator Sizing shows ads.

### Which is updated more often, Pneumatics or PHD Actuator Sizing?

Pneumatics ships an update monthly, and PHD Actuator Sizing every 3 weeks. Most recently, Pneumatics was updated on June 5, 2026 and PHD Actuator Sizing on September 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.*