Comparison

Mobius iVibe vs PMI Official

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

Head to head
About

Mobius iVibe

This app helps identify machine fault conditions by analyzing spectrum symptoms and machine types. It offers explanations, sample spectra, and diagnostic guidance, functioning like a portable reference guide for troubleshooting. Users can navigate through symptoms, machine types, or fault types to find potential issues.

Highlights
  • Identify machine faults by spectrum symptoms
  • Browse by machine type to find likely faults
  • View sample spectral images
  • Detailed diagnostic information
  • Scroll through 80 spectral images
  • Drill down through symptom lists
Features
Read full description

Mobius iVibe provides an easy way to look up machine fault conditions based on spectrum symptoms and machine types. You’ll see sample spectra, explanations of faults, and explanations of how to diagnose fault conditions. It is like a wall chart for your iPhone/iPod Touch. 1. Select from a list of symptoms and drill down to find machine faults 2. Select from a list of machine types and drill down to see the likely faults 3. Select from a list of fault types and drill down to see sample spectra. 4. Or just scroll through 80 spectral images. When you see a spectrum (often with phase information and a machine image) you can swipe up and down to see other similar spectra, or swipe left and right to see a page of details, and a page of diagnostic information (how to be sure the diagnosis is correct). Here are a few more details: 1. Select from a list of symptoms (high 1X, high 2X, harmonics, etc.) and drill down to find machine faults that might be a match (unbalance, misalignment, looseness, etc.) 2. Select from a list of machine types (motor, bearings, pumps, etc.) and drill down to see the likely faults (broken rotor bars, wear, cavitation, etc.) 3. Select from a list of fault types (unbalance, misalignment, looseness, etc.) and drill down to see sample spectra. 4. Or you can just scroll through 80 spectral images until you find what you want.

About

PMI Official

Manage your professional certification, track and report continuing education units, and access an AI-powered project coach. This app helps you maintain your credentials, find learning opportunities, and get expert guidance for project success.

Highlights
  • Professional certification maintenance
  • PDU tracking and reporting
  • AI-powered project coach (PMI Infinity™)
  • Course search and filtering
  • Renewal reminders
  • Single PMI login
Read full description

Maintain your PMI® Professional Certification, earn Professional Development Units (PDUs), and access your AI-powered project coach all in one place. Originally built to help PMI-certified professionals track and report PDUs, the PMI Official App now does much more. With the latest update, you can access PMI Infinity™—your on-the-go AI coach for project success. Whether you’re maintaining your certification, looking for learning opportunities, or managing your next project, the PMI Official App helps you do it all from your mobile device. Maintain Your Professional Certification Understand your PMI Professional Certification’s specific renewal requirements, track your progress across each segment of the Talent Triangle and report PDUs you earn on your own. Gain Project Management Expertise Search, filter and find courses from PMI and our Authorized Training Partners that fuel career growth and project success as you earn PDUs toward certification renewal. Learn (& Earn) On Your Terms From renewal reminders to PDU-earning opportunities that match your life and learning style, you’re in control of when and where you work toward renewal. Streamline Your Maintenance Experience Log in with your existing PMI account for everything you need to maintain your PMI certification(s) in one simple, streamlined experience. Get AI-Powered Expert Guidance Access PMI Infinity™, your secure AI project coach built for project professionals, delivering trusted answers powered by leading GenAI models and grounded in global standards from PMI. Shape the Future of the PMI Official Mobile App What features would you like next? This latest release is just the beginning for the PMI Official mobile app. Share your feedback in the app or on PMI.org at www.pmi.org/official-mobile-app. A complete list of PMI Official mobile app’s features: Professional Certification Maintenance - Renewal Status - Renewal Reminders - PDU Tracking - PDU Reporting - PDU Basics Primer - Learning - Course Search - Advanced Filtering - Saved Courses - Self-Paced Courses PMI Infinity - Chat - Document upload - Chat history - Create and download documents Personalized Utilities - Single PMI Login - Personalized Dashboard - Feedback Survey To learn more about PMI gold-standard certifications for Project Professionals, visit https://www.pmi.org/certifications To share feedback on the app, visit www.pmi.org/official-mobile-app

Screenshots

Mobius iVibe4 screens
PMI Official4 screens

Verdict

The call

The clearest difference is review sentiment: Mobius iVibe at 67% against PMI Official's 17%. Mobius iVibe also leads on iOS requirement (13 vs 16.0). PMI Official's advantage is rating (4.9 vs 3.7) and update cadence (every 6 weeks vs every 50 months). 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

PMI Official holds the better App Store score, 4.9 against 3.7. That said, the two scores are not equally well evidenced: PMI Official has 428 ratings behind it against 7, so its average is the more settled of the two. Written reviews complicate that: 67% of Mobius iVibe's written reviews are positive against 17% of PMI Official's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Mobius iVibe ships an update every 50 months, PMI Official every 6 weeks. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

Scorecard5 real differences · 5 level
Mobius iVibe versus PMI Official: the parameters behind the verdict, then further details
ParameterMobius iVibePMI Official
PriceFreeFree
Rating3.7 (7 ratings)4.9 (428 ratings) — better
Positive reviews66.7% of reviews — better16.7% of reviews
Number of ratings7428 — better
Update frequencyEvery 50 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad
Requires iOS13 — better16.0
Further details — not scored
Size38 MB110 MB
Age rating4+4+
DeveloperMobius InsitutePROJECT MANAGEMENT INSTITUTE, INC

Customer experience

Mobius iVibe

All ratings7 ratings
Positive71.4%
Neutral0.0%
Negative28.6%
Written reviews6 reviews
Positive66.7%
Neutral16.7%
Negative16.7%

PMI Official

All ratings415 ratings
Positive97.6%
Neutral1.0%
Negative1.4%
Written reviews18 reviews
Positive16.7%
Neutral11.1%
Negative72.2%

In-app purchases

None

Mobius iVibe

No in-app purchases

None

PMI Official

No in-app purchases

Questions

Is Mobius iVibe free?
Mobius iVibe is free to download, with no in-app purchases.
Is PMI Official free?
PMI Official is free to download, with no in-app purchases.
Which has better reviews, Mobius iVibe or PMI Official?
PMI Official is rated higher. Mobius iVibe averages 3.7 out of 5 from 7 ratings, while PMI Official averages 4.9 from 428 ratings.
Do Mobius iVibe or PMI Official have ads?
Neither Mobius iVibe nor PMI Official shows ads.
Which is updated more often, Mobius iVibe or PMI Official?
Mobius iVibe ships an update every 50 months, and PMI Official every 6 weeks. Most recently, Mobius iVibe was updated on October 23, 2026 and PMI Official on October 25, 2026.

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