Overhead Install Guide vs Kopperfield
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Overhead Install Guide
This utility app offers Southwire's official recommendations for installing overhead transmission electrical conductors. It provides essential field information and includes a calculator for determining bullwheel and block diameters.
- Overhead conductor installation recommendations
- Information from Overhead Conductor Manual
- Industry standard IEEE 524 data
- Bullwheel and block diameter calculator
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This app provides Southwire’s recommendations for the installation of overhead transmission electrical conductors. It is a convenient way to have the information you need for a successful installation with you in the field. Features: Recommendations for the installation of overhead transmission electrical conductors. Information from our Overhead Conductor Manual and the industry accepted standard IEEE 524. Calculator to determine the minimum diameter of the bullwheel and blocks needed for installation.
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
Screenshots
Verdict
The clearest difference is rating: Overhead Install Guide at 4.6 against Kopperfield's 3.9. Overhead Install Guide also leads on monetization model (free vs ad-supported). Kopperfield's advantage is update cadence (every 3 weeks vs every 9 months) and device support (3 vs 1). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Overhead Install Guide holds the better App Store score, 4.6 against 3.9. Both are backed by a comparable volume of ratings — 5 and 9 respectively.
Overhead Install Guide ships an update every 9 months, Kopperfield every 3 weeks. The most recent releases landed on July 31, 2026 and August 21, 2026 respectively.
| Parameter | Overhead Install Guide | Kopperfield |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (5 ratings) — better | 3.9 (9 ratings) |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | 5 | 9 — better |
| Update frequency | Every 9 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 21 MB | 45 MB |
| Age rating | 4+ | 4+ |
| Developer | Southwire Company | Kopperfield, Inc. |
Customer experience
Overhead Install Guide
Kopperfield
In-app purchases
Overhead Install Guide
No in-app purchases
Kopperfield
No in-app purchases
Questions
Is Overhead Install Guide free?
Is Kopperfield free?
Which has better reviews, Overhead Install Guide or Kopperfield?
Do Overhead Install Guide or Kopperfield have ads?
Which is updated more often, Overhead Install Guide or Kopperfield?
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