SKM Mobile vs AMPFieldKit

This SKM Mobile app requires a $299 USD/year subscription to use. Take SKM on the go! The SKM Mobile app provides an intuitive experience that lets you quickly and easily collect data from the field and seamlessly import it to your PTW desktop program! You can also view study results on your phone or tablet - such as what arc flash PPE to wear or to verify equipment settings! View onlines, take pictures, videos, scan QR codes, scribble notes, and more! Your subscription will be charged to your iTunes account at confirmation of purchase and will automatically renew (at the duration selected) unless auto-renew is turned off at least 24 hours before the end of the current period. The current subscription may not be canceled during the active subscription period; however, you can manage your subscription and/or turn off auto-renewal by visiting your iTunes Account Settings after purchase. Terms of use: https://skm.com/terms-of-use.html Privacy policy: https://www.skm.com/privacy.html

AMPFieldKit is a professional electrical calculator and field reference tool based on NEC guidelines and formulas, designed for electricians, technicians, engineers, and students. Built for real-world use, it delivers fast, accurate calculations and essential reference data in a clean, mobile-optimized interface — no internet connection, ads, or subscriptions required. Electrical Calculators: Power Calculator (DC, Single Phase, Three Phase) Voltage Drop Calculator Ampacity Calculator Power Factor Correction Motor Full Load Current (FLC) Transformer Calculators — Fault Current, Turns Ratio, Sizing, Buck/Boost Resistance Network Calculator (Series / Parallel / Mixed) Reactance Calculator (Capacitance / Inductance) Box Fill Calculator Conductors in Conduit Calculator Reference Tools: Interactive Ohm's Law Chart Weights & Measures Quick Reference Unit Conversions Thread & Tap Drill Tables (UNC / UNF / Metric) Material Properties Table Built for the Field Designed for one-handed use in demanding environments. Every calculation runs instantly and entirely on-device — no login, no tracking, no data collection of any kind. Privacy AMP Field Reference collects no personal data. No accounts. No analytics. Nothing leaves your device.