iAlignCalc vs Horizontal Shaft Alignment
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iAlignCalc
This app calculates machine shaft alignment corrections using multiple methods, including two inverted dial, face-rim, and double radial. It also calculates thermal growth and supports angular, parallel, and combined misalignments. Advanced features include PDF report generation with signatures, sketches, audio, and image attachments.
- Two inverted dial method calculations
- Face-rim method calculations
- Double radial method calculations
- Thermal growth calculations
- PDF report generation
- Interactive tolerance tables and charts
- Save and recall alignment sessions
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iAlignCalc is an iPhone/iPad/iPod Touch application to calculate machine shaft alignment corrections. Features: - Calculates machine shaft alignment corrections using the two inverted dial method. - Calculates machine shaft alignment corrections using the face-rim method. - Calculates machine shaft alignment corrections using the double radial method. - Calculates thermal growth for different materials - Can be used for angular, parallel, and combined misalignments New Features in Version 1.2 for iPhone: - Interactive Shaft Alignment Specification: NASA Standard - Interactive Shaft Alignment Tolerance Table - Interactive Shaft Alignment Tolerance Chart - Report Generation Report Features: - PDF report output - Include user signature - Sketch pad to draw - Voice recording and audio attachment - Email PDF report - Save the PDF file on disk to be accessed from computer - Print the PDF to an Airprint - Include the plant location and the map in the PDF - Up to 5 image attachments from camera, library or screenshots of the alignment calculations - Include text and notes - Speech-to-text feature (Available in iPhone 4S only) New Features in Version 1.3 for iPhone: - Users can save the values and calculations for each alignment session and see them in a table based on the date, and name of the machine. Each saved session can be called and viewed later. Disclaimer: iAlignCalc is intended for educational purposes. Although the calculations done by this application were made with great care, it may contain errors or inaccuracies. Using the results of the calculations is the responsibility of the user.
Horizontal Shaft Alignment
This app assists with horizontal shaft alignment for machinery like motors and pumps. It guides users through the measurement and alignment process using Bluetooth-connected sensors, offering features like Feetlock for challenging situations and instant PDF reporting.
- Bluetooth sensor connectivity
- Guided measurement and alignment process
- Feetlock function for base-bound machines
- Instant PDF report generation
- ACOEM Cloud integration for reporting and sharing
- VertiZontal adjustment without re-measuring
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This is a companion app for performing horizontal shaft alignment, using the RT 300/AT 200/AT 100, on typical applications such as a motor and a pump. The app guides the user throughout the complete measurement and alignment process when using the Bluetooth® connected ACOEM sensors. This offers an extensive shaft alignment package, including the Feetlock function that is useful in base/bolt-bound machine situations. The PDF Report function provides a fast on-site reporting capability by converting saved measurement reports into PDF files. Thanks to the ACOEM cloud instant reporting and instant sharing is easy. ---- Note: This app works only with the ACOEM RT-300 and AT-200 ---- Key Features: - Connected using Bluetooth® - GuideU: Our patented icon-based and color-coded adaptive user interface - VertiZontal™: adjust the machine both vertically and horizontally without re-measuring - Create an instant PDF-report - Connect to the ACOEM Cloud (optional) Visit the website www.acoem.com for more information on alignment in general, the ACOEM tools and support of the app.
Screenshots
Verdict
The clearest difference is iOS requirement: iAlignCalc at 7.0 against Horizontal Shaft Alignment's 13.0. On price, rating, ratings volume and update cadence 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.
On the App Store both sit at effectively the same score — 5.0 for iAlignCalc against 5.0 for Horizontal Shaft Alignment. Both are backed by a comparable volume of ratings — 2 and 2 respectively.
Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on September 22, 2026 and September 9, 2026 respectively.
| Parameter | iAlignCalc | Horizontal Shaft Alignment |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) | 5.0 (2 ratings) |
| Positive reviews | 83.3% of reviews | — |
| Number of ratings | 2 | 2 |
| Update frequency | Every 4 months | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 7.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 5 MB | 123 MB |
| Age rating | 4+ | 4+ |
| Developer | Motionics LLC | ACOEM Group |
Customer experience
iAlignCalc
Horizontal Shaft Alignment
In-app purchases
iAlignCalc
No in-app purchases
Horizontal Shaft Alignment
No in-app purchases
Questions
Is iAlignCalc free?
Is Horizontal Shaft Alignment free?
Which has better reviews, iAlignCalc or Horizontal Shaft Alignment?
Do iAlignCalc or Horizontal Shaft Alignment have ads?
Which is updated more often, iAlignCalc or Horizontal Shaft Alignment?
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