Electrician Handbook

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112K reviews
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Everyone
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Content rating
Everyone
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About this app

For everyone whose work involves electricity — for professionals, beginners and enthusiasts.

This app is a springboard for further study of electrical engineering.

The app includes four sections: theory, electrical wiring diagrams, tests, and calculators.

The app offers over 55 concise articles and 7 calculators. Content is added and updated regularly — feel free to suggest topics.

Briefly covers voltage, current, power, short circuits, Ohm’s law, and much more.

Warning! When working with electrical equipment, electrical safety requirements must be strictly observed. Remember: electricity cannot be seen or heard. Be careful.
Electric circuit diagrams, electrical engineering theory, and calculators
Updated on
Sep 3, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    App info and performance
  • This app may collect these data types
    Location, App activity and 2 others
  • Data is encrypted in transit

Ratings and reviews

109K reviews
Oaky R.
April 28, 2021
The app itself is useful and gorgeous. It lacks some info like ampere ratings, and I personally want to know how to install a two way switch. I dont even know a two way switch from a three way switch, but I know it is complicated. A switch is so simple. Electricity is not simple. Anyway, this app disapoints in its lack of textbook style knowlege. Two stars for you guys!
256 people found this review helpful
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Eric Livesay
December 18, 2020
Pretty good for what it has. But it's missing a few things. Unless I couldn't find them, which is a problem in and of itself, I couldn't find anything on capacitors. No capacitance calculators or formulas. Sorry but when I am trying to figure out what size start up capacitor I need for a particular motor I can't use this app. I'm going to continue using the Mobile Electrician app which is far more in depth than this app.
156 people found this review helpful
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D. McG. (CHOWDA)
June 20, 2021
It's hot everything you could ever need doidn ET work or Electrical Engineering. Back in my day, we had to use our noggins for everything, and sure, it keeps ya sharp, but think about how much time we're saving walking around with these super computers in our pockets every day. Takes seconds to look a formula I haven't thought about in a while and it's great for pulling spec sheets too very quickly.
67 people found this review helpful
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What’s new

Internal libraries update