Comparison

iAlignTest vs Material Numbers

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

iAlignTest

Features
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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.

About

Material Numbers

Features
Read full description

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

iAlignTest4 screens
Material Numbers4 screens

Verdict

The call

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

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.

Scorecard2 real differences ยท 4 level
iAlignTest versus Material Numbers: the parameters behind the verdict, then further details
ParameteriAlignTestMaterial Numbers
PriceFreeFree
Update frequencyEvery 32 monthsEvery 2 days โ€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPad, iPod โ€” better
Requires iOS15.013.0 โ€” better
Further details โ€” not scored
Size8 MB14 MB
Age rating4+4+
DeveloperMotionics LLCASMEIX CORPORATION

In-app purchases

None

iAlignTest

No in-app purchases

None

Material Numbers

No in-app purchases

Questions

Is iAlignTest free?
iAlignTest is free to download, with no in-app purchases.
Is Material Numbers free?
Material Numbers is free to download, with no in-app purchases.
Do iAlignTest or Material Numbers have ads?
Neither iAlignTest nor Material Numbers shows ads.
Which is updated more often, iAlignTest or Material Numbers?
iAlignTest ships an update every 32 months, and Material Numbers every 2 days. Most recently, iAlignTest was updated on October 14, 2026 and Material Numbers on September 29, 2026.

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