# Circuit Wizard > Offline wire sizing calculator for electricians based on ABYC and Blue Sea Systems. (iPhone/iPad app by Blue Sea Systems, Inc..) - Source: https://appshunter.io/ios/app/circuit-wizard/id576865083 (this page in markdown: same URL + `.md`) - Developer: [Blue Sea Systems, Inc.](https://appshunter.io/developer/576865086) - Category: Reference, Utilities - Price: Free - Rating: 3.11/5 from 19 App Store ratings · 15 written reviews indexed - Age rating: 4+ - Requires: iOS 7.1 · 4 MB - Languages: English - Released: 2012-11-14 - Data updated: 2026-06-11 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/circuit-wizard/id576865083/reviews.md ## What is Circuit Wizard? Circuit Wizard is designed to help electricians and enthusiasts determine wire sizing for a given installation based upon specific parameters using ABYC and Blue Sea Systems specifications. Once a wire size is known you can then use that information to search for products offered by Blue Sea Systems in order to protect your circuit. Based upon the popular web application located at http://cw.bluesea.com/, this version is designed to be run completely offline which should be useful in situations where an internet connected computer is not available. ## Key features - Wire sizing calculation - ABYC and Blue Sea Systems specifications - Product search for circuit protection - Offline functionality - Electrical installation reference ## Recent user reviews (10 of 15) All indexed reviews: https://appshunter.io/ios/app/circuit-wizard/id576865083/reviews.md ### 3/5 — Needs 48v calculator *2025-05-25* Good app, but needs 48v calculator. ### 1/5 — No longer working *2025-03-23* Crashes when selecting a function ### 1/5 — No longer works too bad *2024-12-31, version 1.3* It worked on a previous iPhone…. ### 1/5 — Inoperative *2024-03-05* Downloaded on my iPhone 14Pro today. I’m on the latest iOS 17.3.1. The App opens but as soon as I select one of the functions such as calculate wire size the app momentarily freezes then closes. Only the history function actually works but that’s useless since it won’t do anything. There’s no setup or menu available for configuring the app so I see no way to fix this issue. Must be a bug in the app. Till it’s fixed, it’s useless. ### 1/5 — App not working *2024-01-05* The app is no longer working ### 3/5 — 48V PLEASE! *2022-02-21* In this day and age it is simply a must. The only reason i don’t give this app 5 stars. Please add 48v calculations. ### 3/5 — Needs an update for 48v systems *2021-03-07* This app is a useful utility for calculating specifications of DC electrical systems, as found on boats. Easy to use and pretty intuitive. There is a trend toward 48v systems now, with Integrel systems high powered alternators and Oceanvolt propulsion systems. This is leading to more 48v battery banks and applications like 48v windlasses and winches, air conditioning, etc. So I was surprised to see that this app didn’t include 48v, but did include 32v. ### 3/5 — Need update *2020-11-04, version 1.3* This app is5 years old ### 3/5 — Seems this is just for auto or solar *2020-01-22* No 110 voltage only 12,24,32 options. ### 5/5 — Great app! *2018-09-29* This is a great app! It lets you enter your specs and then lets you know what size wire to use safely. I have searched for other wire size tables on the net, but none are as good as this one in my opinion. ## Frequently asked questions about Circuit Wizard ### What is Circuit Wizard used for? Circuit Wizard helps electricians and enthusiasts calculate the correct wire size for electrical installations based on specific parameters and industry standards like ABYC and Blue Sea Systems. It also aids in finding appropriate products to protect these circuits. ### Does Circuit Wizard work offline? Yes, Circuit Wizard is designed to run completely offline. This makes it a useful tool in situations where an internet-connected computer or device is not available. ### What specifications does Circuit Wizard use? The app utilizes specifications from ABYC (American Boat and Yacht Council) and Blue Sea Systems to determine wire sizing for installations. This ensures compliance with industry standards. ### Can Circuit Wizard help me find circuit protection? Once you have determined the correct wire size, Circuit Wizard allows you to search for products offered by Blue Sea Systems that are suitable for protecting your specific circuit. ### What devices is Circuit Wizard available on? Circuit Wizard is available for iPhone and iPod devices. It is compatible with iOS devices. ### What is the age rating for Circuit Wizard? Circuit Wizard has an age rating of 4+, making it suitable for a wide range of users. This indicates it contains no mature content. ### How often is Circuit Wizard updated? The latest version of Circuit Wizard is 1.3, which was last updated on July 23, 2015. This indicates the app has not received updates in several years. ### What is the user rating for Circuit Wizard? Circuit Wizard has an average rating of 3.1 stars based on 19 ratings. This suggests a mixed reception from its user base. ## Version history (last 4 releases) ### 1.3 — 2015-07-23 This app has been updated by Apple to display the Apple Watch app icon. • Ancor wire recommendations added • Various bug fixes ### 1.1.1 — 2013-11-22 Version 1.1.1 fixes a text error, and includes these fixes from 1.1: • Support for latest ABYC standards, including wire bundling, and updates to Blue Sea Systems guidance. • Support for metric wire size in addition to AWG • Support for metric distance measurements in addition to imperial • Support for MCA (Marine Cranking Amperes) battery ratings in addition to CCA • iOS 7 interface updates • Fix crashing bug with out-of-range inputs • Bug fixes ### 1.1 — 2013-11-19 • Support for latest ABYC standards, including wire bundling, and updates to Blue Sea Systems guidance. • Support for metric wire size in addition to AWG • Support for metric distance measurements in addition to imperial • Support for MCA (Marine Cranking Amperes) battery ratings in addition to CCA • iOS 7 interface updates • Fix crashing bug with out-of-range inputs • Bug fixes ### 1.0 — 2012-11-14 No release notes. ## Apps similar to Circuit Wizard | App | Rating | Price | Category | | --- | --- | --- | --- | | [US Sailing Racing Rules](https://appshunter.io/ios/app/us-sailing-racing-rules/id1536827107) | 4.1 (27) | Free | Reference | | [DBMIBS](https://appshunter.io/ios/app/dbmibs/id1665694398) | 1.4 (10) | Free | Reference | | [Wire (AWG) Calculator](https://appshunter.io/ios/app/wire-awg-calculator/id1526471471) | 4.2 (6) | Free | Reference | | [RepeaterBook](https://appshunter.io/ios/app/repeaterbook/id606820166) | 4.5 (30) | Free | Reference | ## Related topics [wiresketch](https://appshunter.io/ios/topics/wiresketch) · [wirex limited](https://appshunter.io/ios/topics/wirex-limited) · [waiver wire](https://appshunter.io/ios/topics/waiver-wire) · [hey wire](https://appshunter.io/ios/topics/hey-wire) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-11.*