Sparky's CircKit
CEC Reference & Trade Tools
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
The code book in your pocket.
The essential electrical app for professionals. From motor sizing to voltage drop calculations, get instant results with tools designed for electricians, contractors, and engineers. Solve complex electrical problems quickly and stay compliant with the Canadian Electrical Code.
AI-POWERED ASSISTANCE
• Ask Sparky, your new AI electrical assistant, for help with electrical questions
• Access Sparky through Siri on Apple Intelligence-compatible devices
• Get quick answers even when you're outside the app
ADVANCED CALCULATIONS
• Motor sizing and protection calculators
• Transformer sizing with protection specifications
• Voltage drop calculations with wire derating
• Conduit and box fill calculators
• Arc flash incident energy calculator
• PVC conduit expansion calculator
• Redesigned and simplified Ohm's Law calculator
• Installation assistant for project guidance
• Recessed-light spacing for optimal layouts
PROFESSIONAL REFERENCE LIBRARY
• Expanded Canadian Electrical Code reference library with 75 new code entries
• Wire and conduit trade-size tables with drill sizes and metric equivalents
• NEMA plug and receptacle configurations and enclosure ratings
• Data pinout references and phase colour codes
• Bonding sizes, burial depths, and strap spacing
• Torque specifications and wire reel estimator
BUILT-IN PRODUCTIVITY TOOLS
• Integrated notes accessible anywhere in the app
• Completely rebuilt fraction calculator with a new tutorial
• Unit converter spanning 14 categories
• Code of the Day with optional daily notifications
• Find tools from your Home Screen or Lock Screen with Spotlight
• Share results without first saving them as notes
• Navigate to jobs using Apple Maps, Google Maps, or Waze
DESIGNED FOR PROFESSIONALS
Enjoy a clean, intuitive interface that now supports landscape mode and resizable windows. Sparky's CircKit delivers organized tools electrical professionals can rely on for accurate, code-compliant results.
Whether you're running conduit, sizing equipment, or planning an installation, Sparky's CircKit provides the calculations and reference data you need to work efficiently and safely.
FREE TRIAL, THEN YOUR CHOICE
Start with a 14-day free trial that unlocks every tool. The trial is free, never renews and is never charged. When it ends, choose the plan that suits you:
• Monthly — $1.99 per month
• Yearly — $14.99 per year
• Lifetime — $39.99, a one-time purchase with no subscription
Prices are in Canadian dollars and shown in your local currency elsewhere. Yearly subscribers can upgrade to lifetime access at a reduced price.
ALREADY OWN SPARKY'S CIRCKIT?
Nothing changes. If you bought the app before it became free to download, every tool stays unlocked for life. There is nothing to subscribe to and nothing to buy.
SUBSCRIPTION TERMS
Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless auto-renewal is turned off at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours before the end of the current period. You can manage your subscription and turn off auto-renewal in your Apple Account settings after purchase.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://www.thesparky.work/privacy/
more - Tool Guides: 18 tools now have a how-to guide. It shows the first time you open a tool and comes back with the ? button.
- Capacitor Sizing: the new trade calculator. You enter voltage and kvar, and it sizes the breaker, conductors, bond and raceway.
- DIP Switch Address: the new Quick Reference tool, with the Simplex, Notifier/Potter, Hochiki, Silent Knight and Edwards presets.
- Smarter Search: home search now finds trade calculators and Quick Reference tools, and matches trade terms like "kvar", "trench" or "RJ45".
- Fixes: voltage drop now suggests 1/0 or larger for parallel runs, and Box Fill warns when fixture studs, wire nuts or devices are added before any conductors.
- Performance and stability improvements
5.2.1 5d ago
- Tool Guides: 18 tools now have a how-to guide. It shows the first time you open a tool and comes back with the ? button.
- Capacitor Sizing: the new trade calculator. You enter voltage and kvar, and it sizes the breaker, conductors, bond and raceway.
- DIP Switch Address: the new Quick Reference tool, with the Simplex, Notifier/Potter, Hochiki, Silent Knight and Edwards presets.
- Smarter Search: home search now finds trade calculators and Quick Reference tools, and matches trade terms like "kvar", "trench" or "RJ45".
- Fixes: voltage drop now suggests 1/0 or larger for parallel runs, and Box Fill warns when fixture studs, wire nuts or devices are added before any conductors.
- Performance and stability improvements
5.2 Oct 4
This update contains bug fixes and performance improvements.
5.1.1 Sep 27
Sparky's CircKit is now free to download, with a 14-day free trial. After the trial you can keep going with a monthly or yearly subscription, or continue to buy it once and own it for life.
Already own Sparky's CircKit? Nothing changes. Every tool stays unlocked for good — no subscription, nothing to buy and nothing to restore.
5.1 Sep 24
Our biggest update yet! Sparky’s CircKit now supports landscape mode and resizable windows, along with:
• Ask Sparky, your new AI electrical assistant
• Siri integration on Apple Intelligence–compatible devices
• 75 new Canadian Electrical Code references
• New Arc Flash and PVC Expansion calculators
• Redesigned Fraction and Ohm’s Law calculators
• Spotlight support for quickly finding tools
• Easier result sharing
• Google Maps and Waze navigation options for Jobs
• Performance and stability improvements throughout the app
5.0.3 Sep 18
Our biggest update yet! Sparky’s CircKit now supports landscape mode and resizable windows, along with:
• Ask Sparky, your new AI electrical assistant
• Siri integration on Apple Intelligence–compatible devices
• 75 new Canadian Electrical Code references
• New Arc Flash and PVC Expansion calculators
• Redesigned Fraction and Ohm’s Law calculators
• Spotlight support for quickly finding tools
• Easier result sharing
• Google Maps and Waze navigation options for Jobs
• Performance and stability improvements throughout the app
5.0.2 Sep 16
Our biggest update yet! Sparky’s CircKit now supports landscape mode and resizable windows, along with:
• Ask Sparky, your new AI electrical assistant
• Siri integration on Apple Intelligence–compatible devices
• 75 new Canadian Electrical Code references
• New Arc Flash and PVC Expansion calculators
• Redesigned Fraction and Ohm’s Law calculators
• Spotlight support for quickly finding tools
• Easier result sharing
• Google Maps and Waze navigation options for Jobs
• Performance and stability improvements throughout the app
5.0.1 Sep 14
Our biggest update yet! Sparky’s CircKit now supports landscape mode and resizable windows, along with:
• Ask Sparky, your new AI electrical assistant
• Siri integration on Apple Intelligence–compatible devices
• 75 new Canadian Electrical Code references
• New Arc Flash and PVC Expansion calculators
• Redesigned Fraction and Ohm’s Law calculators
• Spotlight support for quickly finding tools
• Easier result sharing
• Google Maps and Waze navigation options for Jobs
• Performance and stability improvements throughout the app
5.0 Sep 12
This update includes:
- performance and stability improvements
- fix for bug that would change the ohms law tabs on input
- updated power requirements and power to amperage calculators
4.4.2 Jun 15
This update includes:
- performance and stability improvements
- fix for bug affecting dynamic type size
- updated ohm's law calculator
4.4.1 Jun 7
Share Material Lists – Quickly email your material lists to suppliers directly from the app.
Weather Integration – View local weather forecasts for your job sites to plan your week more effectively.
Pin Jobs & Notes – Keep your most important tasks and notes at the top for faster access.
Performance & Stability – Under-the-hood improvements to speed up your workflow and prevent crashes.
4.4 Mar 13
4.3.3
New in this update:
- added basic mode in FLA tool based on tables 44+45
- bug fixes and performance improvements
4.3
We added a few quality of life improvements and fixed some bugs.
New in this release:
- added defaults for raceway and insulation
- added a 'Fill Contents' button on the last page of the basic and advanced pipe fill calculators to view all wires included in pipe fill calculation
- added Code of the Day history
4.2
Introducing Saved Calculations, allowing you to pick up a calculation where you left it last. When in a calculator or reference tool, simply tap the 'Save as Note' button, create a new note or select an existing one and click save. Anytime you need to return to your Saved Calculation, just return to the note and tap the card at the bottom.
Also new in this release:
- added custom wire sizes to pipe fill (for BAS wires and multi conductor cables)
- fixed bug that could cause voltage drop results to be off
- changed grid view so cards take up two spaces when there's available space
- new user onboarding flow
4.1
We're excited to introduce code of the day notifications! Choose the days you'd like to receive notifications, the time and keep your code knowledge fresh!
Also new in this update:
- more new codes
- new onboarding flow for new users
- bug fixes and performance improvements
4.3.3 Jan 12
4.3.2
New in this update:
- pin and delete Code entries in Code of the Day history
- added more tips
- bug fixes and performance improvements
4.3
We added a few quality of life improvements and fixed some bugs.
New in this release:
- added defaults for raceway and insulation
- added a 'Fill Contents' button on the last page of the basic and advanced pipe fill calculators to view all wires included in pipe fill calculation
- added Code of the Day history
4.2
Introducing Saved Calculations, allowing you to pick up a calculation where you left it last. When in a calculator or reference tool, simply tap the 'Save as Note' button, create a new note or select an existing one and click save. Anytime you need to return to your Saved Calculation, just return to the note and tap the card at the bottom.
Also new in this release:
- added custom wire sizes to pipe fill (for BAS wires and multi conductor cables)
- fixed bug that could cause voltage drop results to be off
- changed grid view so cards take up two spaces when there's available space
- new user onboarding flow
4.1
We're excited to introduce code of the day notifications! Choose the days you'd like to receive notifications, the time and keep your code knowledge fresh!
Also new in this update:
- more new codes
- new onboarding flow for new users
- bug fixes and performance improvements
4.3.2 Jan 2
4.3.1
New in this update:
- pin and delete Code entries in Code of the Day history
- added more tips
- bug fixes and performance improvements
4.3
We added a few quality of life improvements and fixed some bugs.
New in this release:
- added defaults for raceway and insulation
- added a 'Fill Contents' button on the last page of the basic and advanced pipe fill calculators to view all wires included in pipe fill calculation
- added Code of the Day history
4.2
Introducing Saved Calculations, allowing you to pick up a calculation where you left it last. When in a calculator or reference tool, simply tap the 'Save as Note' button, create a new note or select an existing one and click save. Anytime you need to return to your Saved Calculation, just return to the note and tap the card at the bottom.
Also new in this release:
- added custom wire sizes to pipe fill (for BAS wires and multi conductor cables)
- fixed bug that could cause voltage drop results to be off
- changed grid view so cards take up two spaces when there's available space
- new user onboarding flow
4.1
We're excited to introduce code of the day notifications! Choose the days you'd like to receive notifications, the time and keep your code knowledge fresh!
Also new in this update:
- more new codes
- new onboarding flow for new users
- bug fixes and performance improvements
4.3.1 12/30/2025
4.3
We added a few quality of life improvements and fixed some bugs.
New in this release:
- added defaults for raceway and insulation
- added a 'Fill Contents' button on the last page of the basic and advanced pipe fill calculators to view all wires included in pipe fill calculation
- added Code of the Day history
4.2
Introducing Saved Calculations, allowing you to pick up a calculation where you left it last. When in a calculator or reference tool, simply tap the 'Save as Note' button, create a new note or select an existing one and click save. Anytime you need to return to your Saved Calculation, just return to the note and tap the card at the bottom.
Also new in this release:
- added custom wire sizes to pipe fill (for BAS wires and multi conductor cables)
- fixed bug that could cause voltage drop results to be off
- changed grid view so cards take up two spaces when there's available space
- new user onboarding flow
4.1
We're excited to introduce code of the day notifications! Choose the days you'd like to receive notifications, the time and keep your code knowledge fresh!
Also new in this update:
- more new codes
- new onboarding flow for new users
- bug fixes and performance improvements
4.3 12/20/2025
4.2.1
This update contains bug fixes and performance improvements.
4.2
Introducing Saved Calculations, allowing you to pick up a calculation where you left it last. When in a calculator or reference tool, simply tap the 'Save as Note' button, create a new note or select an existing one and click save. Anytime you need to return to your Saved Calculation, just return to the note and tap the card at the bottom.
Also new in this release:
- added custom wire sizes to pipe fill (for BAS wires and multi conductor cables)
- fixed bug that could cause voltage drop results to be off
- changed grid view so cards take up two spaces when there's available space
- new user onboarding flow
4.1
We're excited to introduce code of the day notifications! Choose the days you'd like to receive notifications, the time and keep your code knowledge fresh!
Also new in this update:
- more new codes
- new onboarding flow for new users
- bug fixes and performance improvements
4.2.1 11/30/2025
4.2
Introducing Saved Calculations, allowing you to pick up a calculation where you left it last. When in a calculator or reference tool, simply tap the 'Save as Note' button, create a new note or select an existing one and click save. Anytime you need to return to your Saved Calculation, just return to the note and tap the card at the bottom.
Also new in this release:
- added custom wire sizes to pipe fill (for BAS wires and multi conductor cables)
- fixed bug that could cause voltage drop results to be off
- changed grid view so cards take up two spaces when there's available space
- new user onboarding flow
4.1
We're excited to introduce code of the day notifications! Choose the days you'd like to receive notifications, the time and keep your code knowledge fresh!
Also new in this update:
- more new codes
- new onboarding flow for new users
- bug fixes and performance improvements
4.0
Introducing version 4, featuring Apple's all new Liquid Glass design. The entire app has been redesigned with the new Liquid Glass elements in iOS 26. New sliders, toggles and menus dynamically react to the content underneath. Plus a refreshed Liquid Glass app icon.
Also new in this release:
- new pipe fill calculator mode that allows you to use multiple insulation types in the same pipe with wire derating built in
- code references make finding where we get our info from in the code book even easier
- localization for French Canadian
- bug fixes and performance improvements
4.2 11/07/2025
4.1.1
Fixed bug where keyboard toolbar would not appear for iOS 18 users.
4.1
We're excited to introduce code of the day notifications! Choose the days you'd like to receive notifications, the time and keep your code knowledge fresh!
Also new in this update:
- more new codes
- new onboarding flow for new users
- bug fixes and performance improvements
4.0
Introducing version 4, featuring Apple's all new Liquid Glass design. The entire app has been redesigned with the new Liquid Glass elements in iOS 26. New sliders, toggles and menus dynamically react to the content underneath. Plus a refreshed Liquid Glass app icon.
Also new in this release:
- new pipe fill calculator mode that allows you to use multiple insulation types in the same pipe with wire derating built in
- code references make finding where we get our info from in the code book even easier
- localization for French Canadian
- bug fixes and performance improvements
4.1.1 10/05/2025
4.1
We're excited to introduce code of the day notifications! Choose the days you'd like to receive notifications, the time and keep your code knowledge fresh!
Also new in this update:
- more new codes
- new onboarding flow for new users
- bug fixes and performance improvements
4.0
Introducing version 4, featuring Apple's all new Liquid Glass design. The entire app has been redesigned with the new Liquid Glass elements in iOS 26. New sliders, toggles and menus dynamically react to the content underneath. Plus a refreshed Liquid Glass app icon.
Also new in this release:
- new pipe fill calculator mode that allows you to use multiple insulation types in the same pipe with wire derating built in
- code references make finding where we get our info from in the code book even easier
- localization for French Canadian
- bug fixes and performance improvements
4.1 09/29/2025
4.0.1
Bug fixes and performance improvements.
4.0
Introducing version 4, featuring Apple's all new Liquid Glass design. The entire app has been redesigned with the new Liquid Glass elements in iOS 26. New sliders, toggles and menus dynamically react to the content underneath. Plus a refreshed Liquid Glass app icon.
Also new in this release:
- new pipe fill calculator mode that allows you to use multiple insulation types in the same pipe with wire derating built in
- code references make finding where we get our info from in the code book even easier
- localization for French Canadian
- bug fixes and performance improvements
4.0.1 09/22/2025
Introducing version 4, featuring Apple's all new Liquid Glass design. The entire app has been redesigned with the new Liquid Glass elements in iOS 26. New sliders, toggles and menus dynamically react to the content underneath. Plus a refreshed Liquid Glass app icon.
Also new in this release:
- new pipe fill calculator mode that allows you to use multiple insulation types in the same pipe with wire derating built in
- code references make finding where we get our info from in the code book even easier
- localization for French Canadian
- bug fixes and performance improvements
4.0 09/15/2025
This is a small release fixing some minor bugs from v3.0.
We're already hard at work on v4.0 featuring Apple's all new Liquid Glass design!
Stay tuned...
3.0.3 07/11/2025
This is a small release fixing some minor bugs from v3.0.
We're already hard at work on v4.0 featuring Apple's all new Liquid Glass design!
Stay tuned...
3.0.2 07/09/2025
This is a small release fixing some minor bugs from v3.0.
We're already hard at work on v4.0 featuring Apple's all new Liquid Glass design!
Stay tuned...
3.0.1 06/14/2025
We've been hard at work to bring you more tools to your CircKit!
This update contains:
- updated code references to CEC 2024 (CSA 22.1:24)
- added Tap Rule Calculator to help size wires feeding smaller disconnects off a service
- added Service Calculator to size services based on building, area and load details
- updated UI to match iOS 26 elements (more on this coming in a future update!)
- updated transformer and motor calculator to use step-by-step UX like Install Assistant
- bug fixes and performance improvements
3.0 06/10/2025
- Tool Guides: 18 tools now have a how-to guide. It shows the first time you open a tool and comes back with the ? button.
- Capacitor Sizing: the new trade calculator. You enter voltage and kvar, and it sizes the breaker, conductors, bond and raceway.
- DIP Switch Address: the new Quick Reference tool, with the Simplex, Notifier/Potter, Hochiki, Silent Knight and Edwards presets.
- Smarter Search: home search now finds trade calculators and Quick Reference tools, and matches trade terms like "kvar", "trench" or "RJ45".
- Fixes: voltage drop now suggests 1/0 or larger for parallel runs, and Box Fill warns when fixture studs, wire nuts or devices are added before any conductors.
- Performance and stability improvements
more Version 5.2.1 5d ago
Data Not Collected The developer does not collect any data from this app.
