Comparison

Machine Defender vs O3 ONField

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

Head to head
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

About

O3 ONField

Manage capital projects directly from your mobile device. This app supports industry-leading practices like Advanced Work Packaging (AWP), Agile, and Lean to boost team performance from planning to startup. It enables key workflows, such as IWP progressing, even when offline, ensuring productivity in low-connectivity jobsite environments.

Highlights
  • Mobile capital project management
  • Advanced Work Packaging (AWP) support
  • Agile and Lean methodologies
  • Offline IWP progressing
  • Jobsite productivity tools
Features
Read full description

O3 ONField brings the power of O3’s capital project management platform directly to your mobile device. Built on industry-leading practices like Advanced Work Packaging (AWP), Agile, and Lean, O3 empowers teams to drive performance from planning through startup. Designed for the realities of the jobsite, ONField enables key workflows—such as IWP progressing—even when offline, ensuring productivity in low-connectivity environments.

Screenshots

Machine Defender4 screens
O3 ONField4 screens

Verdict

The call

The clearest difference is update cadence: O3 ONField at fortnightly against Machine Defender's every 8 months. Machine Defender's advantage is iOS requirement (12.1 vs 15.0). On price, rating, ratings volume and ads 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

On the App Store both sit at effectively the same score — 5.0 for Machine Defender against 5.0 for O3 ONField. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

Machine Defender ships an update every 8 months, O3 ONField fortnightly. The most recent releases landed on November 5, 2026 and October 30, 2026 respectively.

Scorecard2 real differences · 7 level
Machine Defender versus O3 ONField: the parameters behind the verdict, then further details
ParameterMachine DefenderO3 ONField
PriceFreeFree
Rating5.0 (1 ratings)5.0 (1 ratings)
Number of ratings11
Update frequencyEvery 8 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.1 — better15.0
Further details — not scored
Size274 MB34 MB
Age rating4+4+
DeveloperACOEM GroupO3 Solutions

Customer experience

Machine Defender

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

O3 ONField

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

In-app purchases

None

Machine Defender

No in-app purchases

None

O3 ONField

No in-app purchases

Questions

Is Machine Defender free?
Machine Defender is free to download, with no in-app purchases.
Is O3 ONField free?
O3 ONField is free to download, with no in-app purchases.
Which has better reviews, Machine Defender or O3 ONField?
Machine Defender and O3 ONField are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do Machine Defender or O3 ONField have ads?
Neither Machine Defender nor O3 ONField shows ads.
Which is updated more often, Machine Defender or O3 ONField?
Machine Defender ships an update every 8 months, and O3 ONField fortnightly. Most recently, Machine Defender was updated on November 5, 2026 and O3 ONField on October 30, 2026.

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