Comparison

E vs Transformer Calc 2

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

Head to head
About

E

This tool helps determine technical characteristics of enamelled copper wire based on industry standards. It offers functions for diameter conversion, resistance calculations, and breakdown voltage.

Highlights
  • Diameter conversion (mm, inch, AWG)
  • Resistance calculation
  • Metal wire diameter calculation
  • Resistance tolerance
  • Enamelled copper quantity and length
  • Breakdown voltage
  • Winding tension calculation
  • Overall diameter tolerance
Features
Read full description

E-Wire Calc is an enamelled copper wire (magnet wire) tool based on the industry standards IEC, NEMA or JIS. It provides several functions for the determination of various technical characteristics of the wire in the range 0,010 - 0,8 mm or AWG 58 - 20 respectively. The function DIAMETER allows the conversion of mm, inch and AWG The function RESISTANCE shows the nominal resistance for the given bare copper wire according to the set standard or calculates the diameter for the given resistance respectively The function METALS allows the calculation of bare wire diameters of different metals for a given resistance. The function RESISTANCE TOLERANCE shows the minimal and maximal permitted resistance for a given nominal copper wire diameter according to the set standard. The function SIZES calculates the quantity of enamelled copper for a selected unit of length, the length for a selected unit of quantity and the cross section for a given bare wire and outer diameter. The function BREAKDOWN VOLTAGE shows the minimum voltage of an enamelled copper wire with a given nominal diameter for different addition / increase classes. The function WINDING TENSION calculates the maximal winding tension in cN recommended by ELEKTRISOLA for a given nominal copper wire diameter. The function OVERALL DIAMETER TOLERANCE shows the minimal and maximal permitted outer diameter for an enamelled wire with a given nominal diameter in different addition / increase classes according to the set standard.

About

Transformer Calc 2

This app provides electricians with instant transformer sizing and advanced construction math, compliant with both US (NEC 2023) and Canadian (CEC 2024) electrical codes. It simplifies complex calculations for wire, conduit, and overcurrent protection, and includes a fractional construction calculator.

Highlights
  • Dual code compliance (NEC 2023, CEC 2024)
  • Instant transformer sizing
  • Wire and conduit sizing
  • Overcurrent protection calculation
  • Fractional construction calculator
  • Unit conversion
  • Dark mode support
Features
Read full description

The essential tool for electricians. Now updated for 2024 CEC and 2023 NEC. Instant transformer sizing and advanced construction math in one app. Description Simplify your electrical calculations with Transformer Calculator 2. Designed for professional electricians, electrical engineers, and apprentices, Transformer Calculator 2 eliminates the guesswork from complex electrical math. Whether you are sizing a new install or verifying an existing setup, this app provides instant, code-compliant results for both US (NEC 2023) and Canadian (CEC 2024) standards. KEY FEATURES: DUAL CODE COMPLIANCE Toggle Instantly: Seamlessly switch between the 2024 CEC (Canada) and 2023 NEC (USA) with a single tap in settings. Localized Standards: The app automatically adjusts wire types, ampacities, and conduit fill rules based on your selected code. COMPREHENSIVE TRANSFORMER SIZING Input Flexibility: Simply enter your KVA, primary and secondary voltages, and configuration (Delta or Wye). Instant Results: Get immediate calculations for Full Load Amps (FLA), Overcurrent Protection (Fuse or Breaker), and Bonding. Wire and Conduit: Automatically sizes your Primary and Secondary wires (minimum size and ampacity) and Conduits (minimum pipe size and fill) based on the latest tables. ADVANCED CONSTRUCTION CALCULATOR Fractional Math: Built-in construction calculator that handles feet, inches, and fractions (1/16, 1/8, etc.) with ease. Unit Conversion: Quickly convert between metric and imperial or different unit scales. Volume and Area: Perform complex dimensional calculations right on the job site. PROFESSIONAL AND CUSTOMIZABLE Detailed References: Extensive database of wire types (THHN, THW, XHHW, etc.) and conduit types (EMT, ENT, Rigid PVC, etc.). Dark Mode: Fully supports system Dark Mode and tinted icons for comfortable viewing in low-light job sites. Custom Settings: Set your default wire types, temperature ratings (60, 75, or 90 degrees C), and precision preferences to match your daily workflow. Stop flipping through code books for every calculation. Download Transformer Calculator 2 today and carry the code in your pocket.

Screenshots

E2 screens
Transformer Calc 24 screens

Verdict

The call

The clearest difference is price: E at Free against Transformer Calc 2's $3.99. E also leads on rating (5.0 vs 1.0) and iOS requirement (13.0 vs 26.0). Transformer Calc 2's advantage is update cadence (every 2 months vs every 18 months). On ratings volume, ads, 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

E is free to download; Transformer Calc 2 costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

E holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

E ships an update every 18 months, Transformer Calc 2 every 2 months. The most recent releases landed on September 12, 2026 and October 5, 2026 respectively.

Scorecard5 real differences · 5 level
E versus Transformer Calc 2: the parameters behind the verdict, then further details
ParameterETransformer Calc 2
PriceFree — better$3.99
Rating5.0 (1 ratings) — better1.0 (1 ratings)
Positive reviews—0.0% of reviews
Number of ratings11
Update frequencyEvery 18 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better26.0
Further details — not scored
Size26 MB16 MB
Age rating4+4+
DeveloperELEKTRISOLASnappy Appz Inc.

Customer experience

E

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Transformer Calc 2

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

E

No in-app purchases

None

Transformer Calc 2

No in-app purchases

Questions

Is E free?
E is free to download, with no in-app purchases.
Is Transformer Calc 2 free?
Transformer Calc 2 costs $3.99, with no in-app purchases.
Which has better reviews, E or Transformer Calc 2?
E is rated higher. E averages 5.0 out of 5 from 1 ratings, while Transformer Calc 2 averages 1.0 from 1 ratings.
Do E or Transformer Calc 2 have ads?
Neither E nor Transformer Calc 2 shows ads.
Which is updated more often, E or Transformer Calc 2?
E ships an update every 18 months, and Transformer Calc 2 every 2 months. Most recently, E was updated on September 12, 2026 and Transformer Calc 2 on October 5, 2026.

Other comparisons