Comparison

Electrical Calc Pro vs Building Wire Selector

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

Building Wire Selector

This tool helps determine the correct conductor size and wire type for electrical installations. It adheres to the National Electrical Code® wiring methods, ensuring compliance and safety.

Highlights
  • Conductor size determination
  • Wire and cable type selection
  • National Electrical Code compliance
  • Electrical installation guidance
Features
Read full description

Southwire's Building Wire Selector determines the minimum conductor size and the best wire and cable type for a particular installation, following the National Electrical Code® wiring methods.

Screenshots

Electrical Calc Pro4 screens
Building Wire Selector2 screens

Verdict

The call

The clearest difference is price: Building Wire Selector at Free against Electrical Calc Pro's $19.99. Building Wire Selector also leads on review sentiment (100% vs 60%). Electrical Calc Pro's advantage is update cadence (every 5 weeks vs every 5 months) and iOS requirement (8.0 vs 16.6). On rating, ratings volume, ads and in-app purchases 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

Building Wire Selector is free to download; Electrical Calc Pro costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Electrical Calc Pro against 5.0 for Building Wire Selector. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews are what separate them: 60% of Electrical Calc Pro's written reviews are positive against 100% of Building Wire Selector's.

UpkeepUpdate frequency

Electrical Calc Pro ships an update every 5 weeks, Building Wire Selector every 5 months. The most recent releases landed on October 5, 2026 and September 29, 2026 respectively.

Scorecard5 real differences · 5 level
Electrical Calc Pro versus Building Wire Selector: the parameters behind the verdict, then further details
ParameterElectrical Calc ProBuilding Wire Selector
Price$19.99Free — better
Rating5.0 (1 ratings)5.0 (2 ratings)
Positive reviews60.0% of reviews100.0% of reviews — better
Number of ratings12 — better
Update frequencyEvery 5 weeks — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS8.0 — better16.6
Further details — not scored
Size22 MB6 MB
Age rating4+4+
DeveloperSnappy Appz Inc.Southwire Company

Customer experience

Electrical Calc Pro

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

Building Wire Selector

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Electrical Calc Pro

No in-app purchases

None

Building Wire Selector

No in-app purchases

Questions

Is Electrical Calc Pro free?
Electrical Calc Pro costs $19.99, with no in-app purchases.
Is Building Wire Selector free?
Building Wire Selector is free to download, with no in-app purchases.
Which has better reviews, Electrical Calc Pro or Building Wire Selector?
Electrical Calc Pro and Building Wire Selector are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.
Do Electrical Calc Pro or Building Wire Selector have ads?
Neither Electrical Calc Pro nor Building Wire Selector shows ads.
Which is updated more often, Electrical Calc Pro or Building Wire Selector?
Electrical Calc Pro ships an update every 5 weeks, and Building Wire Selector every 5 months. Most recently, Electrical Calc Pro was updated on October 5, 2026 and Building Wire Selector on September 29, 2026.

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