TrueOhm vs SparkConnect

TrueOhm is a fast, free electrical calculator built for electricians, apprentices, and engineers. Five powerful calculators in one app: • Ohm's Law Wheel — Enter any two of voltage, current, resistance, or power and instantly solve the other two. • AC Power — Calculate real power, apparent power, current, and voltage for single-phase and three-phase systems. • Power Triangle — Solve the relationship between kW, kVAR, kVA, power factor, and phase angle. • Energy Cost — Estimate energy consumption and cost for any load over any run time. • Efficiency — Calculate motor or system efficiency from input and output power. Every calculation shows its work — tap "How this was calculated" to see the exact formulas and substitutions used. Built-in sanity checks warn you about impossible values without blocking your workflow. Designed for the field. No ads. No subscriptions. Just fast, accurate calculations from 509 Electric.

SparkConnect Tools is the field reference app built for electricians, apprentices, helpers, and contractors who need fast code answers and accurate calculations on the job site. SPARK AI — FIELD REFERENCE SUPPORT Ask any electrical code question and get cited answers. Covers box fill, conduit fill, GFCI/AFCI requirements, grounding, voltage drop, motor sizing, subpanel wiring, and more. Free tier includes 3 answers/day. Pro includes 20/day. AI Answer Packs available separately. Always verify Spark AI answers with your locally adopted electrical code, AHJ, manufacturer instructions, plans, specs, and qualified supervision. VISUAL PIPE BENDER 90 degree, 45 degree, offsets, rolling offsets, 3-point saddle, and 4-point saddle bends with live diagrams and gain/deduct values. Enter your conduit size, bender, and measurements. Get your marks instantly. VOLTAGE DROP CALCULATOR Single-phase and three-phase. Enter conductor material, wire size, length, and load. See voltage drop percentage with pass/fail for NEC recommendations. BOX FILL CALCULATOR NEC 314.16-compliant. Add conductors, devices, and clamps. Get total fill in cubic inches with pass/fail and box selection guidance. CONDUIT FILL CALCULATOR EMT, IMC, RMC, and PVC-40. Mix wire sizes and types. See fill percentage against NEC Chapter 9 limits instantly. WIRE COLOR PANEL 120/240V, 208/120V 3-phase, 480/277V 3-phase, 240V Delta, DC Solar/EV systems with high-leg warning and 160-slot panel layout view. MATERIAL & LABOR ESTIMATOR Build a materials list, add labor hours, and generate a cost summary on the spot. Convert to an invoice with one tap. INVOICE GENERATOR Create professional invoices in the field. Export to PDF, share, and save to Job Cam projects. Pro required for PDF export. JOB CAM Organize job site photos by project folder. Add notes. Share to any platform or save to gallery. Free tier includes 1 project; Pro removes the limit. CODE QUESTION OF THE DAY A new electrical code question every day. Study mode and test mode. 171 questions across 12 categories. Track streaks and personal bests. LEARN / CODE PREP Organized study sessions for apprenticeship exams and journeyman prep. Missed question review. Score history. PRO SUBSCRIPTION $7.99/month or $49.99/year (Launch Special). Includes 20 Spark AI answers/day, Box Fill, Conduit Fill, Invoice PDF export, unlimited Job Cam projects, and priority features. LIFETIME TOOLS One-time purchase. Unlocks core static tools permanently. Spark AI answer packs sold separately. AI ANSWER PACKS 15 answers $1.99 - 50 answers $4.99 - 150 answers $9.99. Packs never expire. DISCLAIMER: SparkConnect Tools is for educational, planning, field-reference, and productivity support only. Always verify with your locally adopted electrical code edition, local AHJ, manufacturer instructions, plans, specs, and qualified supervision. Spark AI may be incomplete or incorrect. Not affiliated with NFPA or the National Electrical Code. Subscriptions auto-renew. Cancel anytime in App Store settings. Terms of Use: https://sparkconnect.pro/terms Privacy Policy: https://sparkconnect.pro/privacy