Comparison

iAlignTest vs JS

Price, ratings, monetisation and update history for both apps, side by side — 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

JS

Features
Read full description

A modern and intuitive calculator for determining the weight and cost of various metal profiles. Supported profiles: • Sheet / Plate • Angle • Channel • Double Channel (I-Beam) • Tee • Pipe • Round Rod • Square Rod • Hexagonal Rod • Hexagonal Pipe • Closed Profile (Box Section) Key features: • Precise Weight Calculation: Instantly calculate weight based on dimensions. • Material Database: Select from a predefined list of metals. • Cost Estimation: Estimate total price based on unit price input. • History & Export: Save your calculations locally and export them to professional PDF reports. • Modern Design: Light and dark theme support with a beautiful Liquid Glass interface. Who is it for? For professionals, engineers, and technicians who need fast and precise metal weight calculations - whether in the office, on the factory floor, or in the workshop.

Screenshots

iAlignTest4 screens
JS3 screens

Verdict

The call

The clearest difference is update cadence: JS at every 4 weeks against iAlignTest's every 32 months. iAlignTest's advantage is iOS requirement (15.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· 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, JS every 4 weeks. The most recent releases landed on September 22, 2026 and September 26, 2026 respectively.

Scorecard2 real differences Ā· 4 level
iAlignTest versus JS: the parameters behind the verdict, then further details
ParameteriAlignTestJS
PriceFreeFree
Update frequencyEvery 32 monthsEvery 4 weeks — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.0 — better26.0
Further details — not scored
Size8 MB17 MB
Age rating4+4+
DeveloperMotionics LLCJS-METALS SP. Z O.O.

In-app purchases

None

iAlignTest

No in-app purchases

None

JS

No in-app purchases

Questions

Is iAlignTest free?
iAlignTest is free to download, with no in-app purchases.
Is JS free?
JS is free to download, with no in-app purchases.
Do iAlignTest or JS have ads?
Neither iAlignTest nor JS shows ads.
Which is updated more often, iAlignTest or JS?
iAlignTest ships an update every 32 months, and JS every 4 weeks. Most recently, iAlignTest was updated on September 22, 2026 and JS on September 26, 2026.

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