# ElectricalWiringPro vs 2017 Master Electrician Ref. The clearest difference is price: ElectricalWiringPro at Free against 2017 Master Electrician Ref.'s $9.99. ElectricalWiringPro also leads on update cadence (every 5 weeks vs every 5 months) and iOS requirement (9.0 vs 12.0). 2017 Master Electrician Ref.'s advantage is rating (4.7 vs 3.4) and review sentiment (67% vs 40%). On ads, in-app purchases and device support there is nothing between them. ElectricalWiringPro is free to download; 2017 Master Electrician Ref. costs $9.99 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 3.4. 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. Written reviews point the same way: 40% of ElectricalWiringPro's written reviews are positive against 67% of 2017 Master Electrician Ref.'s. ElectricalWiringPro ships an update every 5 weeks, 2017 Master Electrician Ref. every 5 months. The most recent releases landed on October 5, 2026 and October 18, 2026 respectively. ## The numbers | Metric | ElectricalWiringPro | 2017 Master Electrician Ref. | | --- | --- | --- | | Price | **Free** | $9.99 | | Rating | [3.4 (8 ratings)](https://appshunter.io/ios/app/electricalwiringpro/id522244565/reviews) | **[4.7 (1.3K ratings)](https://appshunter.io/ios/app/2017-master-electrician-ref/id1275949959/reviews)** | | Number of ratings | 8 | **1.3K** | | Positive reviews | 40.0% of reviews | **66.7% of reviews** | | In-app purchases | No | No | | Ads | No | No | | Update frequency | **Every 5 weeks** | Every 5 months | | Monetization | **Free** | Paid | | Size | 16 MB | 46 MB | | Requires iOS | **9.0** | 12.0 | | Devices | iPhone, iPad, iPod | iPhone, iPad, iPod | | Age rating | 4+ | 12+ | | Developer | [Intineo LLC](https://appshunter.io/developer/365831703) | [PawEng, LLC](https://appshunter.io/developer/390058606) | ## What reviewers say ### ElectricalWiringPro [App page](https://appshunter.io/ios/app/electricalwiringpro/id522244565) This app provides electrical code and design calculations for professionals working with wiring systems. It includes tools for ampacity, wire sizing, box fill, and conduit fill, based on the 2011 National Electrical Code. **Highlights:** Ampacity and wire sizing calculations, Dwelling service size calculations, Box fill calculations, Conduit fill calculations, Color code references for phone and Ethernet, Receptacle configuration information **Features:** macOS Compatibility **In-app purchases:** none ### 2017 Master Electrician Ref. [App page](https://appshunter.io/ios/app/2017-master-electrician-ref/id1275949959) 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 ElectricalWiringPro free? ElectricalWiringPro is free to download, with no 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, ElectricalWiringPro or 2017 Master Electrician Ref.? 2017 Master Electrician Ref. is rated higher. ElectricalWiringPro averages 3.4 out of 5 from 8 ratings, while 2017 Master Electrician Ref. averages 4.7 from 1.3K ratings. ### Do ElectricalWiringPro or 2017 Master Electrician Ref. have ads? Neither ElectricalWiringPro nor 2017 Master Electrician Ref. shows ads. ### Which is updated more often, ElectricalWiringPro or 2017 Master Electrician Ref.? ElectricalWiringPro ships an update every 5 weeks, and 2017 Master Electrician Ref. every 5 months. Most recently, ElectricalWiringPro was updated on October 5, 2026 and 2017 Master Electrician Ref. on October 18, 2026. --- *Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*