Comparison

Pre vs iAlignShaft

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

Head to head
About

Pre

This app guides users through pre-alignment tasks using a connected Bluetooth probe. It allows measurement and recording of run-out, bearing clearance, and soft foot, with the ability to generate instant PDF reports.

Highlights
  • Bluetooth connectivity
  • Icon-based adaptive user interface
  • Measure and record Run-Out
  • Measure and record Bearing Clearance
  • Measure and record True SoftCheck
  • Generate instant PDF reports
Features
Read full description

This is a companion app for performing pre-alignment tasks, using the RT-300/AT-10. The app guides the user through the complete pre-alignment process when using the Bluetooth® connected ACOEM Run-Out Probe. This offers a complete pre-alignment package, including the possibility to measure and record Run-Out, Bearing Clearance, and True SoftCheck. The PDF Report function provides a fast on-site reporting capability by converting saved measurement reports into PDF files. ---- Note: This app works with the ACOEM Run-Out Probe ---- Key Features: - Connected using Bluetooth® - GuideU: Our patented icon-based and color-coded adaptive user interface - Measure and record Run-Out, Bearing Clearance and True SoftCheck. - True SoftCheck - soft foot measurements directly on the feet of the machine. - 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.

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

Pre4 screens
iAlignShaft4 screens

Verdict

The call

The clearest difference is price: Pre at Free against iAlignShaft's $2.99. Pre also leads on device support (3 vs 1) and iOS requirement (13.0 vs 16.2). On update cadence, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Pre 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

Pre ships an update every 7 months, iAlignShaft every 11 months. The most recent releases landed on June 24, 2026 and September 13, 2026 respectively.

Scorecard3 real differences · 6 level
Pre versus iAlignShaft: the parameters behind the verdict, then further details
ParameterPreiAlignShaft
PriceFree — better$2.99
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 7 months — betterEvery 11 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better16.2
Further details — not scored
Size67 MB2 MB
Age rating4+4+
DeveloperACOEM GroupHans Babylone

In-app purchases

None

Pre

No in-app purchases

None

iAlignShaft

No in-app purchases

Questions

Is Pre free?
Pre is free to download, with no in-app purchases.
Is iAlignShaft free?
iAlignShaft costs $2.99, with no in-app purchases.
Do Pre or iAlignShaft have ads?
Neither Pre nor iAlignShaft shows ads.
Which is updated more often, Pre or iAlignShaft?
Pre ships an update every 7 months, and iAlignShaft every 11 months. Most recently, Pre was updated on June 24, 2026 and iAlignShaft on September 13, 2026.

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