iAlignShaft vs Straightness
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
Straightness
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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
Verdict
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
Straightness is free to download; iAlignShaft costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
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.
| Parameter | iAlignShaft | Straightness |
|---|---|---|
| Price | $2.99 | Free — better |
| Update frequency | Every 11 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.2 | 12.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 59 MB |
| Age rating | 4+ | 4+ |
| Developer | Hans Babylone | ACOEM Group |
In-app purchases
iAlignShaft
No in-app purchases
Straightness
No in-app purchases
Questions
Is iAlignShaft free?
Is Straightness free?
Do iAlignShaft or Straightness have ads?
Which is updated more often, iAlignShaft or Straightness?
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