# 2017 Master Electrician Ref. vs Ampora

The clearest difference is price: Ampora at Free against 2017 Master Electrician Ref.'s $9.99. Ampora also leads on review sentiment (100% vs 67%) and update cadence (monthly vs every 5 months). 2017 Master Electrician Ref.'s advantage is in-app purchases (none vs 2) and ads (none vs shown). On device support there is nothing between them.

Ampora is free to download; 2017 Master Electrician Ref. costs $9.99 up front. Ampora sells 2 in-app purchases, starting at $19.99 per month. 2017 Master Electrician Ref. asks for nothing beyond the download.

Ampora holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: 2017 Master Electrician Ref. has 1.3K ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 67% of 2017 Master Electrician Ref.'s written reviews are positive against 100% of Ampora's.

2017 Master Electrician Ref. ships an update every 5 months, Ampora monthly. The most recent releases landed on September 22, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | 2017 Master Electrician Ref. | Ampora |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [4.7 (1.3K ratings)](https://appshunter.io/ios/app/2017-master-electrician-ref/id1275949959/reviews) | **[5.0 (7 ratings)](https://appshunter.io/ios/app/ampora/id6753693522/reviews)** |
| Number of ratings | **1.3K** | 7 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | **#137** | — |
| Size | 46 MB | 42 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [PawEng, LLC](https://appshunter.io/developer/390058606) | [Logan Cox](https://appshunter.io/developer/1844444425) |

## What reviewers say

### 2017 Master Electrician Ref.

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

**Currently charting:** #137 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


### Ampora

[App page](https://appshunter.io/ios/app/ampora/id6753693522)

This AI-powered assistant provides instant, accurate answers for electrical work, including troubleshooting, wire sizing, and NEC code references. It offers professional-grade calculators and works offline, making it an indispensable tool for electricians and DIYers.

**Highlights:** AI-powered Q&A for electrical work, Professional-grade electrical calculators, Instant NEC code reference, Step-by-step troubleshooting guides, Offline functionality, Progress tracking and achievements

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ampora Pro Monthly | $19.99 | per month |
| Ampora Pro | $24.99 | one-time |


## Frequently asked questions

### Is 2017 Master Electrician Ref. free?

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

### Is Ampora free?

Ampora is free to download, with in-app purchases available.

### Which has better reviews, 2017 Master Electrician Ref. or Ampora?

Ampora is rated higher. 2017 Master Electrician Ref. averages 4.7 out of 5 from 1.3K ratings, while Ampora averages 5.0 from 7 ratings.

### Do 2017 Master Electrician Ref. or Ampora have ads?

Ampora shows ads; 2017 Master Electrician Ref. does not.

### Which is updated more often, 2017 Master Electrician Ref. or Ampora?

2017 Master Electrician Ref. ships an update every 5 months, and Ampora monthly. Most recently, 2017 Master Electrician Ref. was updated on September 22, 2026 and Ampora on September 11, 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.*