Comparison

Pre vs Vibration Diagnostic Service

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

Vibration Diagnostic Service

This service helps diagnose machinery health by analyzing vibratory forces emitted by HVAC and rotating equipment. It facilitates the creation of maintenance plans to prevent premature failure and downtime. Data is collected wirelessly via a connected device and analyzed by certified professionals.

Highlights
  • Vibration data collection
  • Wireless data acquisition
  • Cloud-based analysis
  • Predictive maintenance planning
  • Certified analyst reports
  • Email report delivery
Read full description

HVAC and other rotating equipment often emit vibratory forces that can often be used to diagnose machinery health. This information can be used to create a maintenance plan to avoid premature failure and downtime. The WVS-1000 data acquisition device (DAQ) connects wirelessly to smart devices with Apple® iOS® 10.3 operating system and above. Using the Johnson Controls® Vibration Diagnostics Service mobile app, the user can collect vibration data that uses a tri-axial vibration sensor and expedites the data collection process. The data is then uploaded from the smart device to the cloud. The data is analyzed by certified vibration analysts and a customer report is generated and sent via email.

Screenshots

Pre4 screens
Vibration Diagnostic Service4 screens

Verdict

The call

The clearest difference is rating: Pre at 5.0 against Vibration Diagnostic Service's 2.0. Pre also leads on iOS requirement (13.0 vs 15.6). Vibration Diagnostic Service's advantage is update cadence (every 2 months vs every 7 months) and ratings volume (4 vs 1). On price, ads, in-app purchases and monetization model 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Pre holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 1 and 4 respectively.

UpkeepUpdate frequency

Pre ships an update every 7 months, Vibration Diagnostic Service every 2 months. The most recent releases landed on June 24, 2026 and September 12, 2026 respectively.

Scorecard4 real differences · 6 level
Pre versus Vibration Diagnostic Service: the parameters behind the verdict, then further details
ParameterPreVibration Diagnostic Service
PriceFreeFree
Rating5.0 (1 ratings) — better2.0 (4 ratings)
Positive reviews—0.0% of reviews
Number of ratings14 — better
Update frequencyEvery 7 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.6
Further details — not scored
Size67 MB120 MB
Age rating4+4+
DeveloperACOEM GroupJohnson Controls, Inc.

Customer experience

Pre

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Vibration Diagnostic Service

All ratings4 ratings
Positive25.0%
Neutral0.0%
Negative75.0%
Written reviews3 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Pre

No in-app purchases

None

Vibration Diagnostic Service

No in-app purchases

Questions

Is Pre free?
Pre is free to download, with no in-app purchases.
Is Vibration Diagnostic Service free?
Vibration Diagnostic Service is free to download, with no in-app purchases.
Which has better reviews, Pre or Vibration Diagnostic Service?
Pre is rated higher. Pre averages 5.0 out of 5 from 1 ratings, while Vibration Diagnostic Service averages 2.0 from 4 ratings.
Do Pre or Vibration Diagnostic Service have ads?
Neither Pre nor Vibration Diagnostic Service shows ads.
Which is updated more often, Pre or Vibration Diagnostic Service?
Pre ships an update every 7 months, and Vibration Diagnostic Service every 2 months. Most recently, Pre was updated on June 24, 2026 and Vibration Diagnostic Service on September 12, 2026.

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