Kopperfield vs Electrician's assistant
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Load calculator with NEC standards
- Single line diagram tool
- Panel schedule creation
- NEC chatbot
- Instant PDF report generation
- AI panel photo processing
- Team dashboard
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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
Electrician's assistant
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Electrical Calculations and Guides This application is a comprehensive tool for electrical calculations, guides, and creating work orders and quotations. With its user-friendly interface, you can perform quick and accurate calculations and customize your documents. Calculations The app includes various electrical calculations: • Voltage Calculation – Determines voltage based on different parameters. • Current Calculation – Calculates current using Ohm’s law and other formulas. • Power and Resistance Calculations – Computes electrical power and resistance based on voltage, current, and other factors. • Cable Sizing – Determines the appropriate cable cross-section based on load and other parameters. • Energy Calculation – Calculates daily, monthly, and yearly energy consumption and costs. • Loop Resistance and Short-Circuit Current Calculation – Determines the total fault loop resistance and the possible short-circuit current. • Resonant Circuit Impedance Calculation – Calculates impedance considering inductance, capacitance, and resistance. • Fault Loop Impedance Calculation – Determines the required impedance for proper tripping of the protective device. Guides The app includes useful guides and theoretical explanations related to electrical systems: • Ohm’s Law – The fundamental relationship between voltage, current, and resistance. • Kirchhoff’s Law – Describes the distribution of current and voltage in circuits. • Touch Protection – Covers the basics of electrical safety and protection against electric shock. • Residual Current Device (RCD) – Explains protection mechanisms against overcurrent or electric shock. • Circuit Breakers – Provides details on the use and operation of low-voltage circuit breakers. Work Order and Quotation Creation The app allows you to create and edit work orders and quotations: • Fully Customizable Documents – Add and edit notes and items. • PDF Generation – The completed work order is automatically saved to the downloads folder. • Quick Access – Tap the cell to instantly open the PDF preview. • Sending and Importing Documents • Documents can now be sent via email as a JSON file to another device running the same app. On the receiving device, the JSON file can be imported into the app, automatically inserting the received document so it becomes available for editing. Settings The app offers customization options and purchasing features: • Print Field Configuration – Customize fields displayed in the PDF document. • Enter Your Own Details – Set up issuer information for generated documents. • Ad Removal – Remove ads with a one-time purchase. • Backup and Restore • The Settings menu now includes a backup and restore option. This allows you to export all saved documents and settings into a single file and later restore them from that file. This is useful when switching to a new device or recovering lost data. • These features ensure secure document management and seamless data transfer between devices. With this app, you can quickly and easily perform electrical calculations, manage documents, and access essential reference materials.
Screenshots
Verdict
The clearest difference is in-app purchases: Kopperfield at none against Electrician's assistant's 1. Kopperfield also leads on ads (none vs shown). On price, update cadence, 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
Both are free to download. Electrician's assistant sells 1 one-off in-app purchase. Kopperfield asks for nothing beyond the download.
Kopperfield ships an update every 3 weeks, Electrician's assistant every 2 weeks. The most recent releases landed on August 21, 2026 and September 17, 2026 respectively.
| Parameter | Kopperfield | Electrician's assistant |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (9 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 9 — better | — |
| Update frequency | Every 3 weeks | Every 2 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 — better | 15.6 |
| Further details — not scored | ||
| Size | 45 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | Kopperfield, Inc. | Albert Parti |
In-app purchases
Kopperfield
No in-app purchases
Electrician's assistant
- Remove Advertising-Electrician$0.99
Questions
Is Kopperfield free?
Is Electrician's assistant free?
Do Kopperfield or Electrician's assistant have ads?
Which is updated more often, Kopperfield or Electrician's assistant?
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