Comparison

iAlignTest vs iAlignShaft

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
Read full description

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

iAlignShaft

Read full description

iShaftAlign is a simple and user-friendly application that has been designed to help you in aligning equipment shafts. The process of ensuring that two shafts are colinear is a very important step in maintenance. iShaftAlign makes this process easy with the help of simple with a dial gauge. This simple app can be used with machines rotating at a maximum speed of 3000rpm. The application guides the user about the corrections that need to be made at each step to ensure the final alignment is within tolerance.

Screenshots

iAlignTest4 screens
iAlignShaft4 screens

Verdict

The call

The clearest difference is price: iAlignTest at Free against iAlignShaft's $2.99. iAlignShaft's advantage is update cadence (every 11 months vs every 32 months). On ads, in-app purchases, device support and iOS requirement 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

iAlignTest is free to download; iAlignShaft costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

iAlignTest ships an update every 32 months, iAlignShaft every 11 months. The most recent releases landed on October 24, 2026 and October 16, 2026 respectively.

Scorecard2 real differences ยท 4 level
iAlignTest versus iAlignShaft: the parameters behind the verdict, then further details
ParameteriAlignTestiAlignShaft
PriceFree โ€” better$2.99
Update frequencyEvery 32 monthsEvery 11 months โ€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPod โ€” betteriPhone
Requires iOS15.0 โ€” better16.2
Further details โ€” not scored
Size8 MB2 MB
Age rating4+4+
DeveloperMotionics LLCHans Babylone

In-app purchases

None

iAlignTest

No in-app purchases

None

iAlignShaft

No in-app purchases

Questions

Is iAlignTest free?
iAlignTest is free to download, with no in-app purchases.
Is iAlignShaft free?
iAlignShaft costs $2.99, with no in-app purchases.
Do iAlignTest or iAlignShaft have ads?
Neither iAlignTest nor iAlignShaft shows ads.
Which is updated more often, iAlignTest or iAlignShaft?
iAlignTest ships an update every 32 months, and iAlignShaft every 11 months. Most recently, iAlignTest was updated on October 24, 2026 and iAlignShaft on October 16, 2026.

Other comparisons