TrueFault: Fault Current Calc
Short Circuit & AFC Calculator
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
From source to fault point: calculate, review, and keep the job record. Single-phase is free. Unlock three-phase, saved projects, and report tools with one Pro purchase.
Work through available fault current with a clear calculation trail. TrueFault helps electrical contractors enter source and transformer data, build the path to the equipment, and review the result with its inputs, assumptions, and warnings in view.
START WITH SINGLE-PHASE — FREE
Follow five steps: System, Source, Transformer, Path, and Result. Enter known primary available fault current, or review the default infinite-primary assumption. Add conductor and bus runs, choose the fault point, and see the calculated available fault current in amps and kA.
SEE HOW THE SYSTEM CONNECTS
Review a visual one-line from the source through the transformer and path to the equipment. Open calculation details to inspect impedance and contributions. Keep project names, equipment names, source references, and field notes with your calculation.
TRUEFAULT PRO — ONE PURCHASE
Unlock Pro permanently with a one-time in-app purchase. There is no subscription or recurring charge. Pro adds:
• Three-phase fault-current calculations.
• Motor contribution inputs.
• Saved projects and reusable default settings on this device.
• Label and calculation report tools, with print and share actions when the calculation's review requirements are met.
• Local report history for returning to previous work.
The App Store displays your local price before purchase. Restore an eligible Pro purchase with the same Apple Account.
KEEP YOUR WORK CLOSE
Calculations run on your device. No TrueFault account is required. Projects, settings, and report history stay on this device unless you export or back them up separately.
TrueFault is a calculation aid for qualified electrical professionals. Verify the source data, equipment ratings, installation conditions, applicable requirements, and results before use. It does not replace a stamped engineering calculation or an arc-flash study.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
A clearer workflow from source to result:
• Named steps with project, equipment, and location fields in the guided workflow.
• Refreshed system one-line graphics and more readable fault-current results, units, and review status.
• Primary-source settings are preserved when saving and applying defaults.
• Edit or remove generator data directly in the guided workflow.
• Update a saved project or save a copy. Saved projects with incomplete results now prompt recalculation.
• Report printing and sharing use the saved calculation and review acknowledgment, with native print and share controls.
• Local storefront prices and clearer purchase and restore messages, including pending purchases, for the one-time Pro unlock.
Single-phase calculations remain free. Pro has no subscription or recurring charge.
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 MB
- Category
- Productivity
- 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
- TrueFault Pro Unlock $6.99
- Copyright
- © Copyright 2026 509 Electric LLC