SKF Shaft alignment vs Propeller Mobile
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SKF Shaft alignment
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.
- 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
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The Horizontal shaft alignment app is designed to be used with the SKF Shaft Alignment Tool TKSA 51 or TKSA 71. Together, the hardware and the app form an alignment system that allows shaft alignments of many rotating machines to be made in an intuitive and easy way. The system uses line laser to PSD technology that enables highly accurate and reliable shaft alignments. The hardware and its app communicate wirelessly via Bluetooth®. Without the hardware the app can nonetheless be used, as it features a fully functional demonstration mode allowing the complete alignment process to be experienced before purchasing the TKSA 51 or TKSA 71 instrument. KEY FEATURES: • Very easy-to-use – The Horizontal shaft alignment app focuses on making the main alignment tasks as easy as possible and enabling accurate shaft alignments. • Full measurement flexibility – The Horizontal shaft alignment app uses a flexible three position measurement method that allows measurements to start at any angle and if the space is limited alignments can be performed with a total of 40° rotation only. • Demonstration mode – The Horizontal shaft alignment app offers a fully functional demonstration mode allowing the complete alignment process to be experienced before purchasing a supported SKF Shaft Alignment Tool. • Automatic alignment report – Automatically generated alignment reports give a complete overview of the alignment process and results. The reports can be customised with additional notes, a machine picture, a signature and can easily be shared via email or cloud services. • Explanatory videos – Easy to follow videos demonstrating how to set up and perform accurate measurements using the TKSA 51 or TKSA 71. • 3D Animations – 3D animations guide the user through the alignment process, allowing accurate shaft alignment to be performed in a very easy way. • Machine library and QR code scanner – Helps keeping track of the machines that have been measured. Machine information like distances, the machine picture, and other details are saved for each machine and can be reused the next time the same machine is measured. QR codes can be scanned to identify a machine and quickly retrieve its details. The library can also be used for easy access to all the reports generated for each machine in one place. HARDWARE – SKF Shaft Alignment Tool TKSA 51 and TKSA 71: The SKF TKSA 51 and TKSA 71 systems use a pair of measurement units that are combined with laser transmitter and detectors to measure and correct shaft alignment with high accuracy and reliability. The data is transferred in real time through Bluetooth® 4.0 LE to the app. IMPORTANT NOTE: This app is designed to be used with the SKF Shaft Alignment Tool TKSA 51 or TKSA 71 hardware. The SKF TKSA 51 or TKSA 71 can be purchased separately from your local SKF Authorized Distributor. For more information and technical specifications about the SKF Shaft Alignment Tool, please visit our website.
Propeller Mobile
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.
- Live navigation
- 3D site mapping
- Media documentation
- Grade checking
- Cut-fill analysis
- Surface area measurement
- Stockpile volumes
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Propeller Mobile is a 3D site inspection app built to keep field crews connected, aligned, and in control. With your job site in your pocket, Propeller Mobile supports real-time navigation, site checks, and reality capture, empowering faster decisions and keeping projects on track. Propeller Mobile also works alongside your AeroPoint hardware, keeping your ground control workflow connected. More than just a map, Propeller Mobile connects every person on-site to the data they need - enabling teams to move faster, collaborate smarter, and drive results. Why Propeller Mobile? • Stay aligned, wherever you are: Turn your mobile device into a powerful site inspection tool to help you map your next move • Eliminate bottle necks: Verify, document, and adjust plans directly from the field to prevent delays and unnecessary office trips • Keep your projects on track: From live navigation to high-accuracy measurements, you’ll translate field data and designs into decisions Key features: • Live navigation: Instantly see your real-time position relative to designs and site features • 3D site mapping: Explore a digital twin of your site in 3D or 2D for informed decision-making • Media documentation: Pin images and 360° photos to the map to document conditions and share with office teams • Alignments: Measure and track your live position along alignments and stations/chainages • Grade checking: Assess grades as degrees, percentages, or ratios • Cut-fill analysis: Compare surfaces to monitor volume changes and progress over time • Point of interest tagging: Drop points to check elevations or add notes for clarity • Surface area measurement: Quickly calculate areas within any shape • Stockpile volumes: Measure stockpile volumes and create reports in seconds • Cross-section analysis: Generate cross-section charts of designs and surveys • Distance measurement: Measure point-to-point distances with precision • Elevation tracking: Monitor elevation changes and height differences • AeroPoint management: Connect to AeroPoint 2 devices via Bluetooth to monitor battery, charging status, firmware, and data upload progress - and configure custom WiFi credentials for seamless field uploads
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | SKF Shaft alignment | Propeller Mobile |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (10 ratings) | 4.2 (10 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 40.0% of reviews |
| Number of ratings | 10 | 10 |
| Update frequency | Every 3 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.0 — better | 16.1 |
| Further details — not scored | ||
| Size | 72 MB | 214 MB |
| Age rating | 4+ | 4+ |
| Developer | SKF | Propeller Aerobotics Pty Ltd |
Customer experience
SKF Shaft alignment
Propeller Mobile
In-app purchases
SKF Shaft alignment
No in-app purchases
Propeller Mobile
No in-app purchases
Questions
Is SKF Shaft alignment free?
Is Propeller Mobile free?
Which has better reviews, SKF Shaft alignment or Propeller Mobile?
Do SKF Shaft alignment or Propeller Mobile have ads?
Which is updated more often, SKF Shaft alignment or Propeller Mobile?
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