# iCircuit vs 2017 Master Electrician Ref.

The clearest difference is rating: 2017 Master Electrician Ref. at 4.7 against iCircuit's 3.8. 2017 Master Electrician Ref. also leads on in-app purchases (none vs 2) and price ($9.99 vs $12.99). iCircuit's advantage is update cadence (every 3 weeks vs every 5 months). On review sentiment, ads, monetization model and chart position there is nothing between them.

iCircuit costs $12.99 and 2017 Master Electrician Ref. $9.99 up front. iCircuit sells 2 in-app purchases, starting at $1.99 per month. 2017 Master Electrician Ref. asks for nothing beyond the download.

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 134, so its average is the more settled of the two. Written reviews point the same way: 61% of iCircuit's written reviews are positive against 67% of 2017 Master Electrician Ref.'s.

iCircuit ships an update every 3 weeks, 2017 Master Electrician Ref. every 5 months. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | iCircuit | 2017 Master Electrician Ref. |
| --- | --- | --- |
| Price | $12.99 | **$9.99** |
| Rating | [3.8 (134 ratings)](https://appshunter.io/ios/app/icircuit/id383359044/reviews) | **[4.7 (1.3K ratings)](https://appshunter.io/ios/app/2017-master-electrician-ref/id1275949959/reviews)** |
| Number of ratings | 134 | **1.3K** |
| Positive reviews | 61.1% of reviews | **66.7% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 months |
| Monetization | Paid | Paid |
| Best chart rank | **#136** | #168 |
| Size | 126 MB | 46 MB |
| Requires iOS | 12.2 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Krueger Systems, Inc.](https://appshunter.io/developer/299293363) | [PawEng, LLC](https://appshunter.io/developer/390058606) |

## What reviewers say

### iCircuit

[App page](https://appshunter.io/ios/app/icircuit/id383359044)

**Currently charting:** #136 Top Paid · Productivity (US App Store)

Design and simulate analog and digital electronic circuits in real-time. This app offers a comprehensive component library, built-in test equipment, and the ability to create custom elements. It's ideal for learning, prototyping, and validating designs without physical components.

**Highlights:** Real-time circuit simulation, Extensive component library (300+), Built-in test equipment (multimeter, oscilloscope), Programmable Arduino and PIC microcontroller support, Custom element creation and sharing, Audio simulation

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| iCircuit Pro (Monthly) | $1.99 | per month |
| iCircuit Pro (Yearly) | $14.99 | per year |

**What reviewers like**

- 🚀 Great for learning and testing
- 👍 Intuitive and easy to use
- 💡 Programmable Arduino integration
- 👍 Useful for hobbyists and students

**What reviewers complain about**

- 🐛 Buggy and crashes frequently
- 🔧 Difficult to edit and delete components
- 🔧 Limited component library
- 🔧 Inaccurate simulation results in some cases

**Reported bugs**

- Oscilloscope and meter functions not working properly
- Saving and loading circuits can be unreliable
- Inconsistent behavior when rotating/flipping components
- Crashes when working with larger or more complex circuits

**Requested features**

- More components (e.g. transformers, triodes, MOSFETs)
- Ability to create custom components
- Frequency domain analysis (Bode plots, FFT)
- Improved wiring and component placement controls
- Better support for AC circuits and motors


### 2017 Master Electrician Ref.

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

**Currently charting:** #168 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


## Frequently asked questions

### Is iCircuit free?

iCircuit costs $12.99, and also offers in-app purchases.

### Is 2017 Master Electrician Ref. free?

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

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

2017 Master Electrician Ref. is rated higher. iCircuit averages 3.8 out of 5 from 134 ratings, while 2017 Master Electrician Ref. averages 4.7 from 1.3K ratings.

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

Neither iCircuit nor 2017 Master Electrician Ref. shows ads.

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

iCircuit ships an update every 3 weeks, and 2017 Master Electrician Ref. every 5 months. Most recently, iCircuit was updated on September 24, 2026 and 2017 Master Electrician Ref. on September 22, 2026.

### Which is more popular, iCircuit or 2017 Master Electrician Ref.?

iCircuit currently peaks at #136 in the App Store charts, and 2017 Master Electrician Ref. at #168. Chart position reflects recent download velocity rather than total install base.

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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.*