Comparison

Electrical Calc Pro vs Transformer Calculator.

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

Head to head
About

Electrical Calc Pro

This professional electrical application calculates common electrical problems, including wire sizing, conduit sizing, and fusing based on the Canadian Electric Code. It offers advanced features for motor loads, transformers, feeders, and voltage drop calculations, making it an essential tool for electricians and engineers.

Highlights
  • Wire and conduit sizing
  • Motor and transformer load calculations
  • Voltage drop calculations
  • Panel legend creation and export
  • Allowable ampacity and derating
  • Box fill calculations
Features
Read full description

E-Calc Pro is a professional electrical application for calculating many common electrical problems. This app is an essential tool for all electricians and electrical engineers. Unlike other similar apps E-Calc not only calculates simple formulas but returns code results including wire sizing, conduit sizing, fusing, overload size, ground and bond size and much more based on the Canadian Electric Code. The features of this app are too long to list but here are a few of the key ones; - Basic construction calculator allows you to easily divide rooms for lighting in imperial or metric measurements. - Calculate any single motor or multiple motor load and get maximum overcurrent, maximum overload, minimum wire, minimum pipe, and minimum bond wire size. Store a schedule of motors for easy retrieval. - Calculate any transformer size and get KVA, FLA, pipe size, fuse and breaker size, bond size and ground size, on both primary and secondary. Easily choke down the transformer and get appropriate results for the modified demand load. - Calculate feeders for wire size, conduit size and voltage drop simultaneously. - Create panel legends of any size and easily export or print them right from your device. - Calculate the allowable ampacity of any wire type and deration situation. - Calculate maximum number of similar sized wires in a given pipe size. - Calculate pipe size required for a list of any number, size, and type of wire. - Calculate required ground and bonding sizes. - Easily calculate complicated voltage drop calculations. Get results for percentage voltage drop as well as maximum lengths of runs and wire size. Derating is also supported. - Calculate minimum burial depths for any situation including special situations including mechanical protection, under slab, and rock encased. - Calculate any box fill situation in mL and cubic inch. - Calculate recommeneded torque settings for all varieties of lugs and terminations. - Convert many common units. - Find NEMA codes and specs of receptacles. - Calculate residential single dwelling service sizes. - Easily access in app support with quick links to your tablet's email.

About

Transformer Calculator.

This app simplifies transformer calculations for engineers and students. It accurately computes primary and secondary currents, turns ratios, and secondary voltages based on user inputs for transformer ratings and winding turns.

Highlights
  • Primary and secondary current calculations
  • Turns ratio determination
  • Transformer type identification
  • Secondary voltage calculation
  • Supports 1Φ and 3Φ phases
  • User-friendly interface
Features
Read full description

Transformer Calculator: A user-friendly app for Current and Voltage Calculations. Current Calculations • Calculate primary and secondary full-load currents. • Determine the turns ratio and transformer type. How it works: 1. Select the phase type (1Φ or 3Φ). 2. Input transformer ratings (VA/kVA) and primary/secondary voltages. Outputs: • Primary full-load current • Secondary full-load current • Turns Ratio: N1 / N2 = V1 / V2 = I2/ I1 Voltage Calculations How it works: 1. Enter Number of turns in the primary and secondary windings 2. Input Primary voltage Outputs: • Secondary voltage • Turns Ratio: N1 / N2 = V1 / V2 = I2/ I1 Effortless and Accurate: Perfect for engineers and students to compute transformer parameters precisely.

Screenshots

Electrical Calc Pro4 screens
Transformer Calculator.4 screens

Verdict

The call

The clearest difference is price: Transformer Calculator. at Free against Electrical Calc Pro's $19.99. Transformer Calculator. also leads on ratings volume (49 vs 1). Electrical Calc Pro's advantage is in-app purchases (none vs 1) and ads (none vs shown). On 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

Transformer Calculator. is free to download; Electrical Calc Pro costs $19.99 up front. Transformer Calculator. sells 1 one-off in-app purchase. Electrical Calc Pro asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Electrical Calc Pro holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Transformer Calculator. has 49 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Electrical Calc Pro ships an update every 5 weeks, Transformer Calculator. every 4 months. The most recent releases landed on November 1, 2026 and October 27, 2026 respectively.

Scorecard8 real differences · 2 level
Electrical Calc Pro versus Transformer Calculator.: the parameters behind the verdict, then further details
ParameterElectrical Calc ProTransformer Calculator.
Price$19.99Free — better
Rating5.0 (1 ratings) — better4.8 (49 ratings)
Positive reviews60.0% of reviews—
Number of ratings149 — better
Update frequencyEvery 5 weeks — betterEvery 4 months
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS8.0 — better17.6
Further details — not scored
Size22 MB41 MB
Age rating4+4+
DeveloperSnappy Appz Inc.V PUGAZHENTHI

Customer experience

Electrical Calc Pro

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive60.0%
Neutral20.0%
Negative20.0%

Transformer Calculator.

All ratings48 ratings
Positive97.9%
Neutral0.0%
Negative2.1%

In-app purchases

None

Electrical Calc Pro

No in-app purchases

1 purchases

Transformer Calculator.

One-time1
  • Go Pro$3.99

Questions

Is Electrical Calc Pro free?
Electrical Calc Pro costs $19.99, with no in-app purchases.
Is Transformer Calculator. free?
Transformer Calculator. is free to download, with in-app purchases available.
Which has better reviews, Electrical Calc Pro or Transformer Calculator.?
Electrical Calc Pro is rated higher. Electrical Calc Pro averages 5.0 out of 5 from 1 ratings, while Transformer Calculator. averages 4.8 from 49 ratings.
Do Electrical Calc Pro or Transformer Calculator. have ads?
Transformer Calculator. shows ads; Electrical Calc Pro does not.
Which is updated more often, Electrical Calc Pro or Transformer Calculator.?
Electrical Calc Pro ships an update every 5 weeks, and Transformer Calculator. every 4 months. Most recently, Electrical Calc Pro was updated on November 1, 2026 and Transformer Calculator. on October 27, 2026.

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