# Sparky Toolbox — A Calculation App > Electrical contractor's mobile app for quick, on-the-job calculations. (iPhone/iPad app by TrinFJHTechSolutions LLC.) - Source: https://appshunter.io/ios/app/sparky-toolbox/id6782320797 (this page in markdown: same URL + `.md`) - Developer: [TrinFJHTechSolutions LLC](https://appshunter.io/developer/6782320799) - Category: Utilities, Productivity - Price: $19.99 - Rating: 5.00/5 from 4 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 13.0 · 23 MB - Languages: American English - Released: 2026-06-27 - Data updated: 2026-10-24 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/sparky-toolbox/id6782320797/reviews.md ## What is Sparky Toolbox? Stop wasting time with manual paperwork or complex formulas. Built specifically for electrical contractors and field electricians, this app delivers fast, on-the-job preliminary calculations right from your phone. Whether you are estimating a project, bidding a job, or verifying field measurements, these 9 powerful calculators streamline your workflow and save you time. 9 Essential Calculators in One App Ohms Law: Instantly solve for voltage, current, and power. Motor OCPD & Wire Sizing: Determine Overcurrent Protection Devices and wire sizes for motors. Transformer OCPD & Wire Sizing: Get breaker and conductor sizing for transformer loads. Wire Selection & Sizing: Select wire size and matching OCPD for any specific application. Conduit Fill: Check total wire capacity limits for your conduit runs. Voltage Drop: Estimate voltage loss over long distances to keep your systems efficient. Standard Dwelling Load: Simplify residential service calculations in seconds. Transformer Sizing: Determine the kVA rating needed for your specific load requirements. Solar Panel Calculator: Input energy targets to find how many PV panels you will need. Why Electricians Love This App Built for the Field: Clean, high-contrast interface designed for easy use on busy job sites. Fast Estimates: Generate quick preliminary calculations to speed up project bidding. Lightweight & Fast: Opens instantly without lagging, saving you time when every minute counts. Download now and put a full suite of electrical tools right in your pocket! ## Key features - 9 essential electrical calculators - Ohms Law calculations - Motor and Transformer OCPD & Wire Sizing - Conduit Fill and Voltage Drop calculators - Standard Dwelling Load and Transformer Sizing - Solar Panel calculator - Designed for field use with a clean interface ## Is Sparky Toolbox safe? Not enough ratings yet to assess Sparky Toolbox. ## Is Sparky Toolbox legit? Sparky Toolbox has limited verification signals. The AppsHunter Legitimacy Score for Sparky Toolbox is 48 out of 100 points across 7 verification signals from App Store and developer data. ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/sparky-toolbox/id6782320797/reviews.md ### 5/5 — Very happy *2026-07-10* This app has completely changed the way I work. It's made me faster, more accurate, and has saved me both time and money on every job. Having all the essential calculators in one place means I no longer waste time searching through code books or using multiple apps. It's simple, reliable, and built for real-world work. Without a doubt, it's one of the best purchases I've ever made. ### 5/5 — Great app *2026-07-03* I’ve been using this app recently and it’s quickly become one of my go-to tools on the job site. The calculations are straightforward, the interface is clean, and it helps me double-check my work so I feel more confident in my numbers. It’s especially useful when I need quick answers while talking with customers. Overall, it’s a solid, practical app for anyone in the electrical field. ## Frequently asked questions about Sparky Toolbox ### What is Sparky Toolbox? Sparky Toolbox is a paid utility app designed for electrical contractors and field electricians. It offers 9 essential calculation tools to streamline on-the-job tasks like estimating and bidding. ### How much does Sparky Toolbox cost? Sparky Toolbox is a paid application, priced at $19.99. This one-time purchase grants access to all 9 built-in electrical calculators. ### Does Sparky Toolbox have ads? No, Sparky Toolbox does not contain advertisements. As a paid application, it provides an ad-free experience for users. ### What devices support Sparky Toolbox? Sparky Toolbox is currently supported on iPhone and iPod devices. It is designed for iOS users. ### How often is Sparky Toolbox updated? The latest version of Sparky Toolbox is 1.1.5, last updated on July 7, 2026. Updates are released periodically to improve functionality and reliability. ### What are the main calculation tools in Sparky Toolbox? Key tools include Ohms Law, Motor and Transformer OCPD & Wire Sizing, Conduit Fill, Voltage Drop, Standard Dwelling Load, Transformer Sizing, and a Solar Panel calculator. ### Is Sparky Toolbox suitable for beginners? While designed for professionals, the app's straightforward interface and instant calculations can assist electricians of all experience levels in performing essential tasks quickly. ### What is the age rating for Sparky Toolbox? Sparky Toolbox has an age rating of 4+. This indicates it is suitable for a wide range of users, with no mature content. ## Version history (last 3 releases) ### 1.1.5 — 2026-07-07 Bug fixes, UI improvements, and performance enhancements. ### 1.1.4 — 2026-07-01 No visual changes. Fixed wire size calculator logic. ### 1.0 — 2026-06-28 No release notes. ## Apps similar to Sparky Toolbox | App | Rating | Price | Category | | --- | --- | --- | --- | | [Future Value Calculator - Calc](https://appshunter.io/ios/app/future-value-calculator-calc/id1524889662) | 4.2 (72) | Free | Utilities | | [Checkparty Split the Bill Tool](https://appshunter.io/ios/app/checkparty-split-the-bill-tool/id905723797) | 4.8 (46) | Free | Utilities | | [Smart Oil Gauge](https://appshunter.io/ios/app/smart-oil-gauge/id1218366918) | 3.5 (83) | Free | Utilities | | [splitty: Split Bills & Tip](https://appshunter.io/ios/app/splitty-split-bills-and-tip/id1499263885) | 4.6 (83) | Free | Utilities | | [Construction Calculator Master](https://appshunter.io/ios/app/construction-calculator-master/id1623283646) | 4.3 (436) | Free | Utilities | | [EG4 Monitor](https://appshunter.io/ios/app/eg4-monitor/id6448103545) | 3.3 (79) | Free | Utilities | --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-24.*