TrueLine: One-Line Diagram

About this app

TrueLine generates professional one-line electrical diagrams for residential and commercial projects. Design complete single-line diagrams with NEC-compliant conductor sizing, overcurrent protection, and equipment scheduling. FEATURES • Interactive canvas with drag-and-drop circuit layout • Automatic conductor and breaker sizing per NEC • NEC compliance checking with real-time violation alerts • Professional PDF export for submittals and permits • Dark and light diagram themes • Layer controls for conductor labels, EGC, NEC tags, and callouts • Support for panels, sub-panels, and service equipment FREE FEATURES • Residential single-phase diagrams • Standard panel configurations • NEC compliance checking • PDF export PRO SUBSCRIPTION • Commercial and industrial projects • Three-phase power systems • Generator and ATS configurations • Sub-panel and motor circuits • Advanced export options TrueLine Pro is available as a monthly ($4.99/month) or yearly ($39.99/year) auto-renewable subscription. Payment is charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless turned off at least 24 hours before the end of the current period. You can manage and cancel subscriptions in your Account Settings. Any unused portion of a free trial will be forfeited when you purchase a subscription. Privacy Policy: https://line.509electric.com/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

TrueLine Pro is now a one-time purchase: unlock unlimited one-line diagrams, PDF export, and sharing with a single purchase — no subscription. Buy once, unlock forever. Includes stability and performance improvements.

Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.

1. First observed Aug 16, 2026 · 11:02 AM Free