Comparison

Vibra Test vs Machine Defender

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

Head to head
About

Vibra Test

This tool helps assess the vibration severity of rotating machinery according to ISO 10816-03 standards. Users input machine power, foundation type, and vibration velocity to determine the operating condition, displayed in color-coded zones.

Highlights
  • Vibration severity testing
  • ISO 10816-03 compliance
  • Machine power selection
  • Foundation type selection
  • Color-coded operating zones
  • Metric/Imperial units
  • Result sharing via email
Features
Read full description

Vibra Test is a tool for vibration severity test of rotating machinery based on ISO 10816-03. User selects the type of the machine based on the power rating of the machine, selects the type of foundation (flexible or rigid), enters the RMS value of vibration velocity, and the App shows the operating condition of the machine. (Zone A: Blue, Zone B: Green, Zone C: Yellow, Zone D: Red). FEATURES: - Metric and Imperial units option - Interactive vibration severity table - Screenshot saving in the photo library - Email the results of the test DISCLAIMER: Vibra Test is intended for educational purposes. Although the calculations by this app were made with great care, it may contain error or inaccuracies. Using the results of the calculations is the responsibility of the user.

About

Machine Defender

This app, used with a wireless vibration sensor, collects and analyzes vibration data from industrial rotating machinery. It automatically detects faults in components like motors and pumps, providing diagnostic reports and maintenance recommendations.

Highlights
  • Wireless vibration data collection
  • Automatic fault detection with AI
  • Machine health assessment
  • Maintenance recommendations
  • Report storage and sharing
  • Cloud platform connectivity
Features
Read full description

Used in combination with the wireless vibration sensor CAC100800, the ACOEM Machine Defender app helps mechanics to collect vibration data wirelessly and detect faults automatically with the ACOEM Accurex artificial intelligence engine. It is now possible to assess automatically the health of industrial rotating assets and detect faults on various components such as: electric motors, pumps, fans, compressors, gearboxes and more. The vibration measurement settings are automatically defined based on a visual description of the machine kinematics in the field on the mobile device. The user is guided step by step through the whole vibration measurement process, and the ACOEM Accurex automatic diagnostic is performed instantly right in front of the rotating machine and without prior learning phase needed. It provides automatic diagnostic capabilities with overall machinery health assessment, list of faults detected with severity, location on the machine and confidence level, and first level of maintenance recommendation. The following types of defects are managed: bearing or lubrication problem, unbalance, misalignment, structural resonance, pump cavitation, gear defects, shocks or modulation resulting from electrical defects or looseness, other ISO failures such as belt wear, soft foot, nearby disturbance, and more. Results and reports can easily be stored in the app and communicated through native features of the mobile device. It can also be connected to the ai.acoem.com cloud platform, centralizing vibration diagnostics reports, laser alignment reports, data trending and maintenance tasks management. The ACOEM Machine Defender app empowers mechanics to easily improve industrial plant reliability and performance with modern maintenance solutions. To learn more, please visit our website at acoem.com Wireless sensors compatible: CAC1008000

Screenshots

Vibra Test4 screens
Machine Defender4 screens

Verdict

The call

The clearest difference is rating: Machine Defender at 5.0 against Vibra Test's 3.5. Machine Defender also leads on update cadence (every 8 months vs every 18 months). Vibra Test's advantage is iOS requirement (7.1 vs 12.1). On price, ratings volume, 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

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

ReceptionRating · Positive reviews · Number of ratings

Machine Defender holds the better App Store score, 5.0 against 3.5. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

UpkeepUpdate frequency

Vibra Test ships an update every 18 months, Machine Defender every 8 months. The most recent releases landed on October 14, 2026 and September 28, 2026 respectively.

Scorecard3 real differences · 7 level
Vibra Test versus Machine Defender: the parameters behind the verdict, then further details
ParameterVibra TestMachine Defender
PriceFreeFree
Rating3.5 (2 ratings)5.0 (1 ratings) — better
Positive reviews25.0% of reviews—
Number of ratings2 — better1
Update frequencyEvery 18 monthsEvery 8 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS7.1 — better12.1
Further details — not scored
Size10 MB274 MB
Age rating4+4+
DeveloperMotionics LLCACOEM Group

Customer experience

Vibra Test

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews4 reviews
Positive25.0%
Neutral0.0%
Negative75.0%

Machine Defender

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

In-app purchases

None

Vibra Test

No in-app purchases

None

Machine Defender

No in-app purchases

Questions

Is Vibra Test free?
Vibra Test is free to download, with no in-app purchases.
Is Machine Defender free?
Machine Defender is free to download, with no in-app purchases.
Which has better reviews, Vibra Test or Machine Defender?
Machine Defender is rated higher. Vibra Test averages 3.5 out of 5 from 2 ratings, while Machine Defender averages 5.0 from 1 ratings.
Do Vibra Test or Machine Defender have ads?
Neither Vibra Test nor Machine Defender shows ads.
Which is updated more often, Vibra Test or Machine Defender?
Vibra Test ships an update every 18 months, and Machine Defender every 8 months. Most recently, Vibra Test was updated on October 14, 2026 and Machine Defender on September 28, 2026.

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