Pre vs Vibration Diagnostic Service
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
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.
- Vibration data collection
- Wireless data acquisition
- Cloud-based analysis
- Predictive maintenance planning
- Certified analyst reports
- Email report delivery
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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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
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.
| Parameter | Pre | Vibration Diagnostic Service |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 2.0 (4 ratings) |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | 1 | 4 — better |
| Update frequency | Every 7 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 67 MB | 120 MB |
| Age rating | 4+ | 4+ |
| Developer | ACOEM Group | Johnson Controls, Inc. |
Customer experience
Pre
Vibration Diagnostic Service
In-app purchases
Pre
No in-app purchases
Vibration Diagnostic Service
No in-app purchases
Questions
Is Pre free?
Is Vibration Diagnostic Service free?
Which has better reviews, Pre or Vibration Diagnostic Service?
Do Pre or Vibration Diagnostic Service have ads?
Which is updated more often, Pre or Vibration Diagnostic Service?
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