iAlignTest vs Material Numbers
Price, ratings, monetisation and update history for both apps, side by side โ 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.
Material Numbers
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M Numbers: Quick lookup of base metal weldability grouping numbers (Material Numbers) for welding procedure and performance qualification. Data is provided by C-spec from the master source used for generation, proof-reading and maintenance of AWS B2.1 Table C.1 and C.2.
Screenshots
Verdict
The clearest difference is update cadence: Material Numbers at every 2 days against iAlignTest's every 32 months. Material Numbers 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 ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท 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, Material Numbers every 2 days. The most recent releases landed on October 14, 2026 and September 29, 2026 respectively.
| Parameter | iAlignTest | Material Numbers |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 32 months | Every 2 days โ better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad, iPod โ better |
| Requires iOS | 15.0 | 13.0 โ better |
| Further details โ not scored | ||
| Size | 8 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Motionics LLC | ASMEIX CORPORATION |
In-app purchases
iAlignTest
No in-app purchases
Material Numbers
No in-app purchases
Questions
Is iAlignTest free?
Is Material Numbers free?
Do iAlignTest or Material Numbers have ads?
Which is updated more often, iAlignTest or Material Numbers?
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