# Vibra Calc vs Electrical Engineering Pack

The clearest difference is price: Vibra Calc at Free against Electrical Engineering Pack's $4.99. Vibra Calc also leads on iOS requirement (8.0 vs 17.6). Electrical Engineering Pack's advantage is rating (4.7 vs 4.0) and update cadence (every 4 months vs every 39 months). On ads, in-app purchases and device support there is nothing between them.

Vibra Calc is free to download; Electrical Engineering Pack costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Electrical Engineering Pack holds the better App Store score, 4.7 against 4.0. That said, the two scores are not equally well evidenced: Electrical Engineering Pack has 76 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 50% of Vibra Calc's written reviews are positive against 75% of Electrical Engineering Pack's.

Vibra Calc ships an update every 39 months, Electrical Engineering Pack every 4 months. The most recent releases landed on September 22, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Vibra Calc | Electrical Engineering Pack |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | [4.0 (2 ratings)](https://appshunter.io/ios/app/vibra-calc/id458723288/reviews) | **[4.7 (76 ratings)](https://appshunter.io/ios/app/electrical-engineering-pack/id505423236/reviews)** |
| Number of ratings | 2 | **76** |
| Positive reviews | 50.0% of reviews | **75.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 39 months | **Every 4 months** |
| Monetization | **Free** | Paid |
| Size | 22 MB | 14 MB |
| Requires iOS | **8.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Motionics LLC](https://appshunter.io/developer/424498959) | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) |

## 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


### Electrical Engineering Pack

[App page](https://appshunter.io/ios/app/electrical-engineering-pack/id505423236)

This app provides a comprehensive suite of electrical calculators and converters for engineers, electricians, and students. It features over 60 calculators for various electrical parameters and 16 converter categories with extensive unit support. Calculations update automatically as input values or units are changed.

**Highlights:** 60+ Electrical Calculators, 16 Electrical Converter Categories, Automatic Calculation Updates, Resistor Color Code Calculator, Upgraded Voltage Drop Calculator, NEC/IEEE Standards Compliant

**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 Electrical Engineering Pack free?

Electrical Engineering Pack costs $4.99, with no in-app purchases.

### Which has better reviews, Vibra Calc or Electrical Engineering Pack?

Electrical Engineering Pack is rated higher. Vibra Calc averages 4.0 out of 5 from 2 ratings, while Electrical Engineering Pack averages 4.7 from 76 ratings.

### Do Vibra Calc or Electrical Engineering Pack have ads?

Neither Vibra Calc nor Electrical Engineering Pack shows ads.

### Which is updated more often, Vibra Calc or Electrical Engineering Pack?

Vibra Calc ships an update every 39 months, and Electrical Engineering Pack every 4 months. Most recently, Vibra Calc was updated on September 22, 2026 and Electrical Engineering Pack on September 28, 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.*