Apps Created By a Lineman. For Linemen and Apprentices.

I'm Trent Carlock — a journeyman lineman who still runs a bucket every day. I built these apps from nearly a decade of troubleshooting, constructing, and maintaining overhead and underground distribution lines.

XFMR Lab is the only pocket-sized transformer lab simulator available to anyone in the industry, teaching single XFMR wiring, open and closed banking, paralleling, and plenty of other misc/adv labs. Quiz yourself and your crew on common transformer knowledge, or niche situations.

URD jump-starts underground apprentices. From explaining the basics of underground loops, to normally open and normally closed switch positions, to hi-potting and isolating faulted cable sections, Lineman's Reference - URD takes potentially-confusing concepts and procedures and turns them into clear, digestible labs that a first-day hand can complete.

Thousands of Apprentices use these apps to study and practice before stepping up to energized situations. Thousands of Linemen use them as quick field references when they hit a situation they haven't seen in a while. Apprenticeship programs and power companies use these apps to train their employees and often install them on company-provided phones and tablets.

These aren't calculator/diagram apps — they're fully interactive apps that require you to manually wire banks, pull elbows, check voltage, open/close/blow fuses, and restore power to customers. A calculator gives you a number. These apps teach you how and why.