Comparison

Kopperfield vs MAYHAW

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

Head to head
About

Kopperfield

Streamline electrical design and permitting with powerful tools for load calculations, panel schedules, and single-line diagrams. Quickly reference the National Electrical Code with an AI-powered chatbot and generate instant PDF reports for inspectors and clients.

Highlights
  • Load calculator with NEC standards
  • Single line diagram tool
  • Panel schedule creation
  • NEC chatbot
  • Instant PDF report generation
  • AI panel photo processing
  • Team dashboard
Features
Read full description

Save time and money. Get ready for permits and projects with faster and easier design tools from Kopperfield, including load calcs, line diagrams, panel schedules, and more. Once logged into your Kopperfield account, you'll enjoy our: * Load calculator: Easy-to-use interface pre-loaded with common appliances and their standard output values from the National Electrical Code. Add information on the property and your calculation will automatically update. Supports both commercial and residential calculations, as well as the Standard (NEC Article 220 Part III), Optional (NEC Article 220 Part IV), and 2026 Standard (NEC Article 120 Part III) methods. * Single line diagram tool: Contains dozens of common templates and electrical symbols to make it easy to generate new diagrams and share them with your team. View diagrams from any device and create new templates on tablet or desktop for your whole team to use. * Panel schedules: Includes tools to complete panel schedules and create labels for electrical panels. Drag-and-drop interface makes it easy to arrange and customize circuits for both split-phase and three-phase projects. * NEC chatbot: Custom chatbot with advanced search capabilities to quickly reference specific sections of the 2017, 2020, or 2023 National Electrical Code. Includes the following features: * Fast PDF outputs: instantly generate a downloadable, one-page PDF report of your load calc, line diagram, or panel schedule to share with inspectors and customers * Smart property data: enter the property address and we’ll pull in the square footage for any customer project or electrical load calculation * AI panel photo processing: upload a photo of an electrical panel to automatically add items to your load calculation or panel schedule * Team dashboard: store your team's projects and documents in one place for easier management, access, and review *Single and three phase options: use a variety of nominal voltages for residential and commercial building types, including: 120/240V, 120/208V, 120/240V, 208Y/120V 3Ø, 240V 3Ø Delta, 240V 3Ø Hi-leg Delta, 347V 3Ø Delta, 480Y/277V 3Ø, 480V 3Ø Delta, 600Y/347Y 3Ø, 600V 3Ø Delta. * Standard scenarios: generate load calcs for scenarios including single family homes (standard and optional methods), multi dwelling units (i.e., duplex, triplex, quad), 120/208v (three-phase power) dwellings, accessory dwelling units and additions, commercial occupancy types, and heat pumps * Common appliance defaults: choose from a pre-loaded list of common appliances and standard output values that you can adjust for every load calculation * EV charger inputs: include EV charger values to any load calculation, essential for modern homes

About

MAYHAW

Read full description

Electrical Field Assistant is designed to help electricians work smarter, solve problems, and build practical field knowledge. Use the app to: • Ask electrical questions and receive clear, field-friendly guidance • Use AI photo assistance to help identify and understand electrical equipment • Perform common electrical calculations • Check conduit fill and circuit wire sizing • Work through pipe-bending calculations, including offsets, 90s, 3-point saddles, and 4-point saddles • Create quick field notes for jobs and service work • Build electrical knowledge with short learning sessions • Access practical tools from one simple, field-friendly interface • Switch between English and Spanish This app is an informational field-assistance tool and does not replace proper training, qualified supervision, safe work practices, or professional judgment. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Kopperfield4 screens
MAYHAW4 screens

Verdict

The call

The clearest difference is in-app purchases: Kopperfield at none against MAYHAW's 1. On price, ads, device support and iOS requirement 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. MAYHAW sells 1 in-app purchase, starting at $14.99 per month. Kopperfield asks for nothing beyond the download.

Scorecard1 real difference · 9 level
Kopperfield versus MAYHAW: the parameters behind the verdict, then further details
ParameterKopperfieldMAYHAW
PriceFreeFree
Rating3.9 (9 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings9 — better—
Update frequencyEvery 3 weeks—
AdsNoNo
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.115.0 — better
Further details — not scored
Size45 MB13 MB
Age rating4+4+
DeveloperKopperfieldLeDoux Construction & Consulting LLC

In-app purchases

None

Kopperfield

No in-app purchases

1 purchases

MAYHAW

Subscriptions1
  • MAYHAW Standard Monthly$14.991 Month

Questions

Is Kopperfield free?
Kopperfield is free to download, with no in-app purchases.
Is MAYHAW free?
MAYHAW is free to download, with in-app purchases available.
Do Kopperfield or MAYHAW have ads?
Neither Kopperfield nor MAYHAW shows ads.

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