# VibraUnits vs Noria Academy

The clearest difference is rating: Noria Academy at 5.0 against VibraUnits's 4.6. Noria Academy also leads on update cadence (every 4 months vs every 10 months) and review sentiment (100% vs 88%). VibraUnits's advantage is iOS requirement (7.0 vs 15.6). On price, ratings volume, 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.

Noria Academy holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 9 and 4 respectively. Written reviews point the same way: 88% of VibraUnits's written reviews are positive against 100% of Noria Academy's.

VibraUnits ships an update every 10 months, Noria Academy every 4 months. The most recent releases landed on October 23, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | VibraUnits | Noria Academy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (9 ratings)](https://appshunter.io/ios/app/vibraunits/id445231670/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/noria-academy/id1437646521/reviews)** |
| Number of ratings | **9** | 4 |
| Positive reviews | 87.5% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 4 months** |
| Monetization | Free | Free |
| Size | 8 MB | 30 MB |
| Requires iOS | **7.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Motionics LLC](https://appshunter.io/developer/424498959) | [Noria Corporation](https://appshunter.io/developer/570003258) |

## What reviewers say

### VibraUnits

[App page](https://appshunter.io/ios/app/vibraunits/id445231670)

This application facilitates the conversion of mechanical vibration analysis units. It supports conversions between displacement, velocity, and acceleration, along with frequency and various amplitude scales.

**Highlights:** Velocity, acceleration, displacement conversion, Frequency conversion (Hz to CPM), Displacement conversion (mils to microns), Velocity conversion (inch/s to mm/s), Acceleration conversion (G's to m/s^2)

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

**In-app purchases:** none


### Noria Academy

[App page](https://appshunter.io/ios/app/noria-academy/id1437646521)

Prepare for machinery lubrication certifications with interactive study modes. Features flashcards, practice exams, and comprehensive charts to track mastery and identify areas needing improvement. Aligns with classroom content for effective pre-course and post-course learning.

**Highlights:** Flashcards with topic sorting, Practice exams (simulated or quick review), Confidence level sorting, Comprehensive progress charts, Alignment with classroom content, Preparation for ICML and MLA certifications

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is VibraUnits free?

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

### Is Noria Academy free?

Noria Academy is free to download, with no in-app purchases.

### Which has better reviews, VibraUnits or Noria Academy?

Noria Academy is rated higher. VibraUnits averages 4.6 out of 5 from 9 ratings, while Noria Academy averages 5.0 from 4 ratings.

### Do VibraUnits or Noria Academy have ads?

Neither VibraUnits nor Noria Academy shows ads.

### Which is updated more often, VibraUnits or Noria Academy?

VibraUnits ships an update every 10 months, and Noria Academy every 4 months. Most recently, VibraUnits was updated on October 23, 2026 and Noria Academy on October 7, 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.*