Comparison

Electrical Calculations vs SKM Mobile

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Electrical Calculations

This app provides a comprehensive suite of electrical calculations for professionals. It supports various international standards and offers detailed reports in PDF format. The tool covers wiring, power, motor, and electronic calculations, along with extensive conversion tables and resources.

Highlights
  • Wire size and voltage drop calculations
  • Power, current, and resistance calculations
  • Motor performance and connection diagrams
  • Electronic component calculations
  • Extensive unit conversions
  • PDF report generation
  • Support for IEC, CEI, NEC, CEC standards
Features
Read full description

Electrical Calculations is the PROFESSIONAL app for those who work with electrical systems every day: design, size and verify in just seconds, from the job site or the office. Over 200 calculations, diagrams, formulas and tables in a single app, with clear, printable PDF reports to attach to your documents. Designed for electricians, installers, designers and surveyors, it saves you time and helps you avoid mistakes: from cable sizing to short circuit. COMPLIANT WITH STANDARDS Reliable results aligned with the main standards: IEC (International Electrotechnical Commission), CEI (Italian Electrotechnical Committee), NEC (National Electrical Code), CEC (Canadian Electrical Code). WHY CHOOSE IT SAVE TIME: the calculations you'd do by hand, instantly available here. AVOID ERRORS: verified formulas and up-to-date regulatory parameters. PROFESSIONAL REPORTS: PDF reports ready for printing and archiving. ALWAYS WITH YOU: over 200 tools including calculations, converters, tables and pinouts. THE MOST USED CALCULATIONS Cable sizing and coordination with the protective device, voltage drop, operating current, current intensity, voltage and power (active, reactive, apparent). Power factor and power factor correction. Current capacity of conductors and busbars, sizing of conduits and trunking, maximum cable length. SHORT CIRCUIT AND PROTECTION Short-circuit current at a point on the line, earthing system and coordination with the residual current device, cable protection against short circuit (K²S²), power loss, cable temperature, neutral current. ELECTRIC MOTOR Motor current, power, voltage, efficiency and power factor, slip, speed, maximum torque and full-load current. Three-phase motor connection diagrams, terminal markings. Three-phase to single-phase. ELECTRONICS Color and alphanumeric codes for resistors, capacitors and inductors, SMD code, LED resistor, voltage and current divider, Zener diode, battery life, resonant frequency, fuses and transformers. CONVERSIONS Delta-star, AWG, SWG, cross-section, length, energy, temperature, pressure, Ah/kWh, var/µF, Gauss/Tesla, RPM and many more. RESOURCES AND TABLES Tripping curves, cable reactance and resistivity, cable dimensions and weight, distribution systems (TT, TN, IT), IP/IK/NEMA protection ratings, ATEX marking, insulation classes, electrical symbols, ANSI device codes, plugs and sockets, IEC 60309, NEMA and EV charging connectors, SI prefixes and units of measurement, thermistors and thermocouples. PINOUTS Ethernet RJ-45, Ethernet with PoE, USB, HDMI, VGA, DVI, RS-232, FireWire, SATA, DisplayPort, Apple Lightning, Raspberry Pi, OBD II, XLR audio/DMX, MIDI, Jack, RCA, Thunderbolt, SD Card, SIM Card and LED. Stop searching everywhere for formulas and tables: PUT YOUR ENTIRE ELECTRICAL LAB IN YOUR SMARTPHONE. Download Electrical Calculations and work faster, with standards-compliant results. Terms of service (EULA): https://www.egalnetsoftwares.com/terms_of_service_app/

About

SKM Mobile

Capture field data, view study results, and manage equipment settings on your mobile device. Seamlessly import information to your desktop program and enhance your workflow with on-the-go access to essential project details.

Highlights
  • Field data collection
  • View study results
  • Import data to desktop
  • Capture photos and videos
  • Scan QR codes
  • Scribble notes
Features
Read full description

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

Screenshots

Electrical Calculations4 screens
SKM Mobile4 screens

Verdict

The call

The clearest difference is rating: Electrical Calculations at 4.6 against SKM Mobile's 3.0. Electrical Calculations also leads on monetization model (free with in-app purchases vs subscription) and update cadence (every 3 weeks vs every 7 months). SKM Mobile's advantage is ads (none vs shown) and iOS requirement (12.2 vs 15.0). On price, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Electrical Calculations sells 3 in-app purchases, starting at $3.99 per 3 months and SKM Mobile sells 1 in-app purchase, starting at $299.99 per year. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Electrical Calculations holds the better App Store score, 4.6 against 3.0. That said, the two scores are not equally well evidenced: Electrical Calculations has 128 ratings behind it against 3, so its average is the more settled of the two.

UpkeepUpdate frequency

Electrical Calculations ships an update every 3 weeks, SKM Mobile every 7 months. The most recent releases landed on October 20, 2026 and October 16, 2026 respectively.

Scorecard6 real differences · 4 level
Electrical Calculations versus SKM Mobile: the parameters behind the verdict, then further details
ParameterElectrical CalculationsSKM Mobile
PriceFreeFree
Rating4.6 (128 ratings) — better3.0 (3 ratings)
Positive reviews86.7% of reviews—
Number of ratings128 — better3
Update frequencyEvery 3 weeks — betterEvery 7 months
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases — betterSubscription
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.012.2 — better
Further details — not scored
Size56 MB132 MB
Age rating4+4+
DeveloperEgal Net di Ettore GallinaS.K.M. SYSTEMS ANALYSIS, INC.

Customer experience

Electrical Calculations

All ratings128 ratings
Positive92.2%
Neutral1.6%
Negative6.3%
Written reviews309 reviews
Positive86.7%
Neutral2.3%
Negative11.0%

SKM Mobile

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

3 purchases

Electrical Calculations

Subscriptions2
  • PRO Version (3 months)$3.993 Months
  • PRO Version (1 year)7 Days trial$7.491 Year
One-time1
  • PRO Version (Lifetime)$89.99
1 purchases

SKM Mobile

Subscriptions1
  • SKM Mobile Subscription$299.991 Year

Questions

Is Electrical Calculations free?
Electrical Calculations is free to download, with in-app purchases available.
Is SKM Mobile free?
SKM Mobile is free to download, with in-app purchases available.
Which has better reviews, Electrical Calculations or SKM Mobile?
Electrical Calculations is rated higher. Electrical Calculations averages 4.6 out of 5 from 128 ratings, while SKM Mobile averages 3.0 from 3 ratings.
Do Electrical Calculations or SKM Mobile have ads?
Electrical Calculations shows ads; SKM Mobile does not.
Which is updated more often, Electrical Calculations or SKM Mobile?
Electrical Calculations ships an update every 3 weeks, and SKM Mobile every 7 months. Most recently, Electrical Calculations was updated on October 20, 2026 and SKM Mobile on October 16, 2026.

Other comparisons