Love the free tools
Really enjoy all the free calculators. When I am in the field, a lot of of the times we don’t have cell phone reception and these calculators continue to work.
Free
In-App Purchases
About
This app provides electricians with a comprehensive digital toolbox, featuring numerous electrical calculators, searchable code references, and job documentation tools. It offers offline functionality for all calculators and tables, with AI assistance for calculations and field notes.
✓75+ electrical calculators
✓Searchable NEC code references (2020, 2023, 2026)
✓Offline functionality
✓AI Assistant for calculations and notes
✓Nameplate Scanner for equipment data
✓Job documentation and material lists (Pro)
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What's New in VoltBook
1.0.15
August 26, 2026
Gave the user the ability to rate the VoltBook app from inside the app. The user can access a button from the settings screen to rate the app. Also After three calculations are done a pop-up will ask the user if they are enjoying the app.
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Subscriptions & In-App Purchases
Pro Monthly
Monthly Charge for Pro Plan
$4.991 Month
User reviews
Developer apps
FAQ
What is VoltBook?
VoltBook is a professional field toolbox for electricians, offering electrical calculators, searchable code references, and job documentation tools. It aims to streamline field work with features like AI assistance and offline access.
Does VoltBook have ads?
No, VoltBook does not contain advertisements. The core functionality and all 75 calculators are free and work offline without ads.
What are the subscription options for VoltBook Pro?
VoltBook Pro is available as a monthly subscription for $4.99 or an annual subscription for $39.99. These subscriptions unlock advanced documentation features and increased AI requests.
Can I use VoltBook offline?
Yes, all 75 calculators and every table in VoltBook are available offline, forever. No account or internet connection is required for these core features.
How does the AI Assistant in VoltBook work?
The AI Assistant allows you to describe a job in plain language, and it will run verified calculators for you. You can also ask AI to explain results or draft field notes, with a limited number of requests included in the free version.
What NEC code editions does VoltBook support?
VoltBook supports switching between the 2020, 2023, and 2026 editions of the National Electrical Code (NEC). Results from calculators will show their corresponding NEC references.
What devices is VoltBook available on?
VoltBook is currently supported on iPhone and iPod devices. The age rating for the app is 17+.
How often is VoltBook updated?
VoltBook was last updated on August 21, 2026, with version 1.0.11. The app was initially released on August 19, 2026.
