iAlignCalc vs RSR Alignment App
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
Read full descriptionHide full description
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.
RSR Alignment App
Measure camber and toe angles using your smartphone. The app displays angles for all four corners, allows zero point adjustment, and stores measurement data for later reference. It also lets you change the measurement interval.
- Measure camber angle
- Measure toe angle
- Display four-corner angles
- Zero point adjustment
- Store measurement data
- Change measurement interval
Read full descriptionHide full description
You can measure camber angle and toe in with your smart phone. 【Function】 （When adjusting the camber) ・Display the angles of four corners. ・Zero point adjustment ・Store the measurement data and refer to it. ・Change the measurement interval (When adjusting the toe) ・Store the data and refer to it. 【Operating system】 Measurement accuracy may differ depending on performance of the sensor equipped on the smart phone.
Screenshots
Verdict
The clearest difference is review sentiment: iAlignCalc at 83% against RSR Alignment App's 0%. iAlignCalc also leads on rating (5.0 vs 3.0) and iOS requirement (7.0 vs 11.0). On price, ratings volume, update cadence and ads 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.
iAlignCalc holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews point the same way: 83% of iAlignCalc's written reviews are positive against 0% of RSR Alignment App's.
iAlignCalc ships an update every 4 months, RSR Alignment App every 3 months. The most recent releases landed on September 22, 2026 and June 11, 2026 respectively.
| Parameter | iAlignCalc | RSR Alignment App |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 83.3% of reviews — better | 0.0% of reviews |
| Number of ratings | 2 | 2 |
| Update frequency | Every 4 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 7.0 — better | 11.0 |
| Further details — not scored | ||
| Size | 5 MB | 57 MB |
| Age rating | 4+ | 4+ |
| Developer | Motionics LLC | TMC CO.,LTD |
Customer experience
iAlignCalc
RSR Alignment App
In-app purchases
iAlignCalc
No in-app purchases
RSR Alignment App
No in-app purchases
Questions
Is iAlignCalc free?
Is RSR Alignment App free?
Which has better reviews, iAlignCalc or RSR Alignment App?
Do iAlignCalc or RSR Alignment App have ads?
Which is updated more often, iAlignCalc or RSR Alignment App?
Other comparisons
