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Electric Master

Terms of Use

Last updated: September 16, 2026

Agreement

By downloading, installing or using Electric Master (“the App”), you agree to these Terms of Use and to Apple’s Standard End User License Agreement (EULA), available at https://www.apple.com/legal/internet-services/itunes/dev/stdeula/.

The service

Electric Master is a calculation and documentation tool for electrical work. It offers calculators for voltage drop, conductor sizing, ampacity and derating, conduit fill and bending, box fill, load calculations, grounding and bonding, motors, transformers, fault current and selectivity, and a Panel Planner for laying out panels and exporting PDF reports. It is based on the National Electrical Code (NEC), the Canadian Electrical Code (CEC), BS 7671 and DIN VDE 0100; which calculators appear depends on the standard you select.

Free use and Electric Master Pro

Free

The App is free to download. On each device, every calculator can be used free of charge during your first visit to it. Panel Planner can be used free of charge with a starter set of devices.

Pro

Electric Master Pro unlocks every calculator without limit, the full Panel Planner device library and PDF export. It is offered as:

  • Pro Monthly: an auto-renewing monthly subscription.
  • Pro Lifetime: a one-time purchase that does not renew.

Prices are shown in the App before you buy and depend on your country (on the App Store in the US: US$9.99 a month, or US$59.99 once).

Purchase terms

  • Payment is charged to your Apple Account when you confirm the purchase.
  • Pro Monthly renews automatically unless you cancel it at least 24 hours before the end of the current period. Your account is charged for the renewal within 24 hours before the period ends, at the price shown in your subscription settings; Apple tells you about any price change.
  • You can manage or cancel the subscription in your Apple Account settings on your device after purchase.
  • To restore purchases on another device signed in to the same Apple Account, tap Restore Purchases on the App’s Pro screen.
  • Refunds are handled by Apple at reportaproblem.apple.com.

Professional disclaimer

Electric Master is a reference and calculation aid for licensed electricians and qualified electrical professionals. It does not replace professional judgment, field verification or compliance with the codes and regulations that apply to your work.

  • Verify every calculation before you rely on it for an electrical installation.
  • The edition and local amendments adopted by the authority having jurisdiction (AHJ) always govern, and they may differ from the edition the App uses.
  • Calculations assume standard conditions; actual field conditions may differ.
  • Responsibility for the design and execution of an electrical installation rests with the qualified person doing the work.

Intellectual property

Electric Master and its content, features and functionality are owned by Trade Calc Suite and protected by copyright and other intellectual property laws. The App is not affiliated with, endorsed by or sponsored by NFPA, CSA Group, the IET, VDE, DIN or DKE. NEC® and National Electrical Code® are registered trademarks of the National Fire Protection Association, Inc.

Limitation of liability

To the maximum extent permitted by applicable law, Trade Calc Suite is not liable for any indirect, incidental, special, consequential or punitive damages resulting from your use of the App. The App is provided “as is,” without warranty of any kind.

Nothing in these terms limits liability that the law does not allow to be limited, including liability for intent, gross negligence, injury to life, body or health, or under product liability law, and nothing limits your statutory rights as a consumer.

Changes to these terms

We may change these Terms of Use for the future. Changes are posted on this page with a new date.

Governing law

These terms are governed by and construed in accordance with applicable law.

Contact

Questions about these terms: [email protected]