TrueLine: One-Line Diagram
Electrical One-Line Generator
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
TrueLine Pro is a one-time purchase — buy once, unlock forever. No subscription, nothing renews.
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/
Ratings & Reviews
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.
The developer, Nicole Nalley, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Nicole Nalley
- Size
- 2.9 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- TrueLine Pro Unlock $9.99
- Copyright
- © 2026 509 Electric LLC