# 2017 Master Electrician Ref. vs Electrical Motor Calculator

The clearest difference is rating: 2017 Master Electrician Ref. at 4.7 against Electrical Motor Calculator's 3.8. 2017 Master Electrician Ref. also leads on update cadence (every 5 months vs every 43 months) and ratings volume (1.3K vs 8). Electrical Motor Calculator's advantage is price ($2.99 vs $9.99). On ads, in-app purchases, monetization model and chart position there is nothing between them.

2017 Master Electrician Ref. costs $9.99 and Electrical Motor Calculator $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

2017 Master Electrician Ref. holds the better App Store score, 4.7 against 3.8. That said, the two scores are not equally well evidenced: 2017 Master Electrician Ref. has 1.3K ratings behind it against 8, so its average is the more settled of the two.

2017 Master Electrician Ref. ships an update every 5 months, Electrical Motor Calculator every 43 months. The most recent releases landed on September 22, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | 2017 Master Electrician Ref. | Electrical Motor Calculator |
| --- | --- | --- |
| Price | $9.99 | **$2.99** |
| Rating | **[4.7 (1.3K ratings)](https://appshunter.io/ios/app/2017-master-electrician-ref/id1275949959/reviews)** | [3.8 (8 ratings)](https://appshunter.io/ios/app/electrical-motor-calculator/id1635906150/reviews) |
| Number of ratings | **1.3K** | 8 |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 43 months |
| Monetization | Paid | Paid |
| Best chart rank | **#65** | #174 |
| Size | 46 MB | 1 MB |
| Requires iOS | **12.0** | 13 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [PawEng, LLC](https://appshunter.io/developer/390058606) | [Heng Jia Liang](https://appshunter.io/developer/1532000635) |

## What reviewers say

### 2017 Master Electrician Ref.

[App page](https://appshunter.io/ios/app/2017-master-electrician-ref/id1275949959)

**Currently charting:** #65 Top Paid · Productivity (US App Store)

This digital handbook provides electricians and related professionals with essential electrical formulas, diagrams, and reference tables. It offers calculations, a dictionary of terms, and detailed information on wiring, motors, transformers, and more, all accessible on a mobile device.

**Highlights:** Electrical formulas and calculations, Wiring diagrams for various systems, Motor and transformer specifications, Conductor and ampacity tables, Dictionary of electrician terms, NEMA standards and diagrams, Math and conversion tools

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

**In-app purchases:** none

**What reviewers like**

- 👍 Quick reference
- 🚀 Best app for electrical information
- 🚀 Concise and well-laid out information
- 🚀 Comprehensive electrical references

**What reviewers complain about**

- 🐛 App needs to be updated
- 🐛 Inaccurate information in some areas
- 🐛 Limited functionality compared to expectations
- 🐛 Overlapping table of contents

**Reported bugs**

- Conduit fill information missing for certain types
- Login screen freezes
- Compatibility issues with older devices

**Requested features**

- Update to latest NEC code
- Add calculation tools for conduit fill and voltage drop
- Improve user interface and navigation


### Electrical Motor Calculator

[App page](https://appshunter.io/ios/app/electrical-motor-calculator/id1635906150)

**Currently charting:** #174 Top Paid · Productivity (US App Store)

This engineering tool calculates key electrical motor characteristics like amps, horsepower, and kVa. Input system voltage, motor efficiency, and power factor to determine electrical values for your system.

**Highlights:** Calculate amps, horsepower, and kVa, Input system voltage and motor efficiency, Converts kilowatts to horsepower, Defines Power Factor (PF) and Full Load Amps (FLA), Calculates Running Load Amps (RLA)

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

**In-app purchases:** none


## Frequently asked questions

### Is 2017 Master Electrician Ref. free?

2017 Master Electrician Ref. costs $9.99, with no in-app purchases.

### Is Electrical Motor Calculator free?

Electrical Motor Calculator costs $2.99, with no in-app purchases.

### Which has better reviews, 2017 Master Electrician Ref. or Electrical Motor Calculator?

2017 Master Electrician Ref. is rated higher. 2017 Master Electrician Ref. averages 4.7 out of 5 from 1.3K ratings, while Electrical Motor Calculator averages 3.8 from 8 ratings.

### Do 2017 Master Electrician Ref. or Electrical Motor Calculator have ads?

Neither 2017 Master Electrician Ref. nor Electrical Motor Calculator shows ads.

### Which is updated more often, 2017 Master Electrician Ref. or Electrical Motor Calculator?

2017 Master Electrician Ref. ships an update every 5 months, and Electrical Motor Calculator every 43 months. Most recently, 2017 Master Electrician Ref. was updated on September 22, 2026 and Electrical Motor Calculator on September 21, 2026.

### Which is more popular, 2017 Master Electrician Ref. or Electrical Motor Calculator?

2017 Master Electrician Ref. currently peaks at #65 in the App Store charts, and Electrical Motor Calculator at #174. Chart position reflects recent download velocity rather than total install base.

---

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