# Vibra Calc vs Mobius iVibe

The clearest difference is rating: Vibra Calc at 4.0 against Mobius iVibe's 3.7. Vibra Calc also leads on iOS requirement (8.0 vs 13). Mobius iVibe's advantage is review sentiment (67% vs 50%) and ratings volume (7 vs 2). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Vibra Calc holds the better App Store score, 4.0 against 3.7. Both are backed by a comparable volume of ratings — 2 and 7 respectively. Written reviews complicate that: 50% of Vibra Calc's written reviews are positive against 67% of Mobius iVibe's, so the app with the better star average is not the one people write more warmly about.

Vibra Calc ships an update every 39 months, Mobius iVibe every 50 months. Both last shipped on October 23, 2026.

## The numbers

| Metric | Vibra Calc | Mobius iVibe |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (2 ratings)](https://appshunter.io/ios/app/vibra-calc/id458723288/reviews)** | [3.7 (7 ratings)](https://appshunter.io/ios/app/mobius-ivibe/id482836743/reviews) |
| Number of ratings | 2 | **7** |
| Positive reviews | 50.0% of reviews | **66.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 39 months** | Every 50 months |
| Monetization | Free | Free |
| Size | 22 MB | 38 MB |
| Requires iOS | **8.0** | 13 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Motionics LLC](https://appshunter.io/developer/424498959) | [Mobius Insitute](https://appshunter.io/developer/482836746) |

## What reviewers say

### Vibra Calc

[App page](https://appshunter.io/ios/app/vibra-calc/id458723288)

This app calculates vibration frequencies for various rotating machinery components and includes an interactive vibration severity test tool. It also offers a calculator for converting vibration units and a glossary of terms.

**Highlights:** Induction motor frequency calculation, Detailed gear frequencies, Rolling element bearing frequencies, Pump and fan vane pass frequencies, Journal bearing frequencies, Interactive vibration severity test, Vibration unit conversion

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Mobius iVibe

[App page](https://appshunter.io/ios/app/mobius-ivibe/id482836743)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Vibra Calc free?

Vibra Calc is free to download, with no in-app purchases.

### Is Mobius iVibe free?

Mobius iVibe is free to download, with no in-app purchases.

### Which has better reviews, Vibra Calc or Mobius iVibe?

Vibra Calc is rated higher. Vibra Calc averages 4.0 out of 5 from 2 ratings, while Mobius iVibe averages 3.7 from 7 ratings.

### Do Vibra Calc or Mobius iVibe have ads?

Neither Vibra Calc nor Mobius iVibe shows ads.

### Which is updated more often, Vibra Calc or Mobius iVibe?

Vibra Calc ships an update every 39 months, and Mobius iVibe every 50 months. Most recently, Vibra Calc was updated on October 23, 2026 and Mobius iVibe on October 23, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*