iAlignTest vs Vertical Shaft Alignment
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iAlignTest
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An interactive reference tool for machine shaft alignment. It provides the common reference tables, specifications and charts for shaft alignment tolerance. Three main standards are included: 1- NASA Precision Alignment Specs (Ames Policy Directive APD 8830.1) 1.a) Alignment Tolerance for Soft Foot 1.b) Alignment Tolerance for Short Coupling: Horizontal and Angular 1.c) Alignment Tolerance for couplings with spacers 2- Common Tolerance Table with the RPM input for Angular, Parallel, and Spacer Shaft cases User selects the RPM range, enters alignment values and sees the alignment condition and tolerance range for the machine. 3- Interactive Alignment Tolerance Chart with three regions: Excellent, Acceptable, and Unacceptable. User enters RPM, offset and angles in both horizontal and vertical directions, and interactively sees the condition of the machine in the chart Features: - Shaft Alignment Specification: NASA Standard - Interactive Shaft Alignment Tolerance Table - Interactive Shaft Alignment Tolerance Chart in mm and inch - Email the results DISCLAIMER: iAlignTest is intended for educational purposes. Although the references in this App are made with great care, however it may contain errors and inaccuracies. Using the results of this App is the responsibility of the user.
Vertical Shaft Alignment
This app guides users through the vertical shaft alignment process for motor and pump applications using specific Bluetooth-connected sensors. It facilitates measurement and alignment, and allows for instant PDF report generation on-site.
- Bluetooth sensor connectivity
- Guided measurement and alignment process
- Icon-based adaptive user interface
- Instant PDF report generation
- Works with RT-300/AT-200 sensors
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This is a companion app for performing vertical shaft alignment, using the RT-300/AT-200, 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. The PDF Report function provides a fast on-site reporting capability by converting saved measurement reports into PDF files. ---- 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 - Create an instant PDF-report 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 update cadence: Vertical Shaft Alignment at every 6 months against iAlignTest's every 32 months. Vertical Shaft Alignment also leads on iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support 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.
iAlignTest ships an update every 32 months, Vertical Shaft Alignment every 6 months. The most recent releases landed on October 14, 2026 and October 7, 2026 respectively.
| Parameter | iAlignTest | Vertical Shaft Alignment |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 32 months | Every 6 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 8 MB | 94 MB |
| Age rating | 4+ | 4+ |
| Developer | Motionics LLC | ACOEM Group |
In-app purchases
iAlignTest
No in-app purchases
Vertical Shaft Alignment
No in-app purchases
Questions
Is iAlignTest free?
Is Vertical Shaft Alignment free?
Do iAlignTest or Vertical Shaft Alignment have ads?
Which is updated more often, iAlignTest or Vertical Shaft Alignment?
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