Comparison

Electrical Calculations vs THERble

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

THERble

Features
Read full description

オフィス執務者の快適性や、工場の作業者や屋外環境での人の温熱感を評価する温熱指標を、測定機器や気象データなどの物性値から計算し、評価することができます。また、計算結果を、アプリ内のボタンより、画像として保存することができます。 アプリの使い方でわからないことがあった際には、アプリ内コンテンツのHelpページを参照してください。

Screenshots

Electrical Calculations4 screens
THERble4 screens

Verdict

The call

The clearest difference is in-app purchases: THERble at none against Electrical Calculations's 3. THERble also leads on ads (none vs shown) and iOS requirement (12.0 vs 15.0). Electrical Calculations's advantage is update cadence (every 3 weeks vs every 16 months). On price 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. THERble asks for nothing beyond the download.

UpkeepUpdate frequency

Electrical Calculations ships an update every 3 weeks, THERble every 16 months. The most recent releases landed on September 22, 2026 and December 12, 2025 respectively.

Scorecard4 real differences · 6 level
Electrical Calculations versus THERble: the parameters behind the verdict, then further details
ParameterElectrical CalculationsTHERble
PriceFreeFree
Rating4.6 (126 ratings) — better—
Positive reviews86.7% of reviews—
Number of ratings126 — better—
Update frequencyEvery 3 weeks — betterEvery 16 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.012.0 — better
Further details — not scored
Size56 MB46 MB
Age rating4+17+
DeveloperEgal Net di Ettore GallinaSHIN NIPPON AIR TECHNOLOGIES CO.,LTD.

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
None

THERble

No in-app purchases

Questions

Is Electrical Calculations free?
Electrical Calculations is free to download, with in-app purchases available.
Is THERble free?
THERble is free to download, with no in-app purchases.
Do Electrical Calculations or THERble have ads?
Electrical Calculations shows ads; THERble does not.
Which is updated more often, Electrical Calculations or THERble?
Electrical Calculations ships an update every 3 weeks, and THERble every 16 months. Most recently, Electrical Calculations was updated on September 22, 2026 and THERble on December 12, 2025.

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