# SKF Shaft alignment vs Propeller Mobile

The clearest difference is review sentiment: SKF Shaft alignment at 100% against Propeller Mobile's 40%. Propeller Mobile's advantage is rating (4.2 vs 3.7) and update cadence (every 2 weeks vs every 3 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

Propeller Mobile holds the better App Store score, 4.2 against 3.7. Both are backed by a comparable volume of ratings — 10 and 10 respectively. Written reviews complicate that: 100% of SKF Shaft alignment's written reviews are positive against 40% of Propeller Mobile's, so the app with the better star average is not the one people write more warmly about.

SKF Shaft alignment ships an update every 3 months, Propeller Mobile every 2 weeks. The most recent releases landed on August 9, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | SKF Shaft alignment | Propeller Mobile |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (10 ratings)](https://appshunter.io/ios/app/skf-shaft-alignment/id990162436/reviews) | **[4.2 (10 ratings)](https://appshunter.io/ios/app/propeller-mobile-3d-mapping/id1644272004/reviews)** |
| Number of ratings | 10 | 10 |
| Positive reviews | **100.0% of reviews** | 40.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 72 MB | 214 MB |
| Requires iOS | **16.0** | 16.1 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SKF](https://appshunter.io/developer/472922971) | [Propeller Aerobotics Pty Ltd](https://appshunter.io/developer/1077083929) |

## What reviewers say

### SKF Shaft alignment

[App page](https://appshunter.io/ios/app/skf-shaft-alignment/id990162436)

This utility app, when paired with specific hardware, enables precise and intuitive shaft alignment for rotating machinery. It offers a demonstration mode for experiencing the full process without the hardware and generates automatic, shareable reports.

**Highlights:** Intuitive shaft alignment with hardware, Flexible three-position measurement, Demonstration mode for full experience, Automatic, customizable alignment reports, Explanatory setup and measurement videos, 3D animations for guidance, Machine library with QR code scanner

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

**In-app purchases:** none


### Propeller Mobile

[App page](https://appshunter.io/ios/app/propeller-mobile-3d-mapping/id1644272004)

This app provides field crews with a mobile 3D site inspection tool. It enables real-time navigation, site checks, and data capture to facilitate faster decision-making and keep projects on track.

**Highlights:** Live navigation, 3D site mapping, Media documentation, Grade checking, Cut-fill analysis, Surface area measurement, Stockpile volumes

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

**In-app purchases:** none


## Frequently asked questions

### Is SKF Shaft alignment free?

SKF Shaft alignment is free to download, with no in-app purchases.

### Is Propeller Mobile free?

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

### Which has better reviews, SKF Shaft alignment or Propeller Mobile?

Propeller Mobile is rated higher. SKF Shaft alignment averages 3.7 out of 5 from 10 ratings, while Propeller Mobile averages 4.2 from 10 ratings.

### Do SKF Shaft alignment or Propeller Mobile have ads?

Neither SKF Shaft alignment nor Propeller Mobile shows ads.

### Which is updated more often, SKF Shaft alignment or Propeller Mobile?

SKF Shaft alignment ships an update every 3 months, and Propeller Mobile every 2 weeks. Most recently, SKF Shaft alignment was updated on August 9, 2026 and Propeller Mobile on September 13, 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.*