Comparison

iAlignShaft vs Straightness

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

Head to head
About

iAlignShaft

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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.

About

Straightness

Features
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This companion app performs straightness measurements using the AT-400 Ultimate on typical applications such as guides. The app guides the user through the complete measurement and alignment process when using the Bluetooth® connected ACOEM M9 sensor. This offers extensive, easy-to-use straightness measurement capability. The PDF Report function provides fast on-site reporting capability by converting saved measurement reports into PDF files. ---- Note: This app works only with the ACOEM AT-400 with the M9 sensor ---- Key Features: - Connected using Bluetooth® - GuideU: Our patented icon-based and color-coded adaptive user interface - New 3D views of the result - 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.

Screenshots

iAlignShaft4 screens
Straightness4 screens

Verdict

The call

The clearest difference is price: Straightness at Free against iAlignShaft's $2.99. Straightness also leads on update cadence (every 2 months vs every 11 months) and device support (3 vs 1). On 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

Straightness 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

iAlignShaft ships an update every 11 months, Straightness every 2 months. The most recent releases landed on October 16, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 2 level
iAlignShaft versus Straightness: the parameters behind the verdict, then further details
ParameteriAlignShaftStraightness
Price$2.99Free — better
Update frequencyEvery 11 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.212.0 — better
Further details — not scored
Size2 MB59 MB
Age rating4+4+
DeveloperHans BabyloneACOEM Group

In-app purchases

None

iAlignShaft

No in-app purchases

None

Straightness

No in-app purchases

Questions

Is iAlignShaft free?
iAlignShaft costs $2.99, with no in-app purchases.
Is Straightness free?
Straightness is free to download, with no in-app purchases.
Do iAlignShaft or Straightness have ads?
Neither iAlignShaft nor Straightness shows ads.
Which is updated more often, iAlignShaft or Straightness?
iAlignShaft ships an update every 11 months, and Straightness every 2 months. Most recently, iAlignShaft was updated on October 16, 2026 and Straightness on October 31, 2026.

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