Built by an electrician. Built for your shift.

Log your hours.
Solve the field math.

Keep your apprenticeship on track and your next calculation close. Free hour tracking, electrical calculators, and a clear path to exam prep.

iPhone app · free web tools44 web calculatorsUnion and non-union

Created by Jeremy Kaigler, IBEW Local 58. Our story

Your workbench
SparkShift app screen for logging OJT hours, with weekly and monthly totals
Actual app screensSee hour tracking
Apple Watch companionJobsite map context inside the appElectrician forumPush-to-talk in field testing

Crew radio is currently being field-tested. Review current device support and availability on the download page.

Start with what you need

Start free. Build toward your license.

Choose hour tracking, field tools, or free practice questions. Start with the tools you need today, then explore paid study options when you want more focused exam preparation.

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Free Apprentice

Build the record you will need later.

Log OJT hours, prepare on-the-job reviews (OJRs), follow apprenticeship progress, and keep the trade tools you use every week close by.

  • OJT hour logging and progress
  • On-the-job reviews and supervisor review
  • 44 public web calculators
  • Forum, directory, and field references
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Free Journeyman Tools

Get the field answer without buying another app.

Use the calculators, code references, forum, directory, and free practice questions as a practical journeyman toolkit.

  • 44 public web calculators
  • Code references and worked examples
  • Forum and contractor/local directory
  • Free journeyman practice test
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Test Prep

Study for the license you are actually chasing.

Start with free practice, then explore Journeyman or Master prep for your licensing jurisdiction when you want deeper sessions and progress tracking.

  • Free practice before checkout
  • Journeyman and Master study paths
  • Prep for your licensing jurisdiction
  • Graded sessions and progress tracking

Free electrical calculators

A field answer.
With the working behind it.

Size a conductor. Check a box. Review the drop on a long run. Start with 44 free web calculators, then use the references and worked examples to understand the result.

  1. 1Enter the actual circuit and installation conditions.
  2. 2Review the result, assumptions and code references.
  3. 3Check the adopted edition and project requirements.
Explore all 44 calculators

Box Fill

Illustrative example
Illustrative junction box with conductor paths and a device yoke4-inch square box · marked 21 in³

Required volume

16 in³

Box volume21 in³
Remaining5 in³
ReferenceNEC 314.16

14 AWG · 4 conductors · 2 grounds
1 internal clamp · 1 device yoke

Example only. Enter your actual conditions and verify the adopted code edition and box markings.

Reference tools for checking field math. Final installation decisions depend on adopted codes, local amendments and site conditions.

See the App Before You Commit

Review the real screens, compare the worker workflows, and check the download details before deciding if SparkShift fits how you actually work.

SparkShift hours-log screen with hour-total cards and add-work-log controls
Apprentices

Hour Logs You Do Not Have to Rebuild Later

Track daily entries and shift history with exportable records you can review before submitting them to your program, employer, or licensing authority.

See OJT Tracking
SparkShift forum screen showing crew questions, trade posts, and electrician discussion
Forum & Crew Context

Trade Questions and Crew Context in One Place

Browse electrician discussions and see how forum threads, jobsite map context, and crew workflows fit together. Crew-radio features remain in field testing.

Browse the Forum
Check Before You Download

See the Store Details Before You Download

Review the live App Store listing, supported devices, Apple Watch support, Android availability, and the free tools already available on the public site before you decide where to start.

  • Current screenshots and release details
  • App Store rating: 5.0/5 from 3 current ratings
  • Platform-specific pricing and trial terms
  • Apple Watch companion details and current Android availability
  • Direct App Store access plus free web calculators you can use right now
  • Fast access to calculators, guides, and resource pages from the web
Review Download Options
Rendered preview of equipment from SparkShift’s electrical training workshop
Rendered equipment previewExplore the room in 3D

Free 3D workshop

Find the tool.
Learn the next move.

Search the gangbox and work through a walkable electrical room. Identify materials, choose tools, plan cable supports and inspect mistakes, with feedback and room to retry.

beginner labs
6
short rounds
15
equipment stations
4

Explore transformer connections, crimping, motor controls and power systems. Or take on the conduit wall job: mark, drill, fit and inspect.

Desktop or laptop with a keyboard and mouse. Touch play isn’t available yet.

Free independent practice. Technical lesson review pending; no training credit or certification.

Why SparkShift Feels Different

Built from field problems, not office guesses.

SparkShift earns trust by showing where it came from: field-tested workflows, offline-friendly behavior where supported, and a social layer electricians can shape while the archive is still young.

Founder-Led

Jeremy Kaigler built SparkShift out of IBEW Local 58.

SparkShift started with a working electrician trying to keep hours, forms, and jobsite details from slipping through the cracks. The public guides still carry that same trade-first voice.

  • 5th Year Apprentice perspective baked into the workflow choices
  • Trade-experienced contributors and editors review the public content for clarity
Read the founder story

Jobsite Reliability

Offline-friendly on the jobsite.

Weak basements, dead zones, and half-finished service installs are normal. SparkShift is designed to keep key calculators, logs, and saved references available where supported, then sync when service comes back.

  • Open calculators and code references without hunting for service
  • Keep logging hours and field notes, then sync later
Review app and device options

Worker Data Boundary

Your trade records do not become someone else's database.

SparkShift is worker-first. Contractors, training programs, union halls, schools, associations, and other organizations do not receive raw worker data merely because a worker appears on a jobsite, selects a program, joins a channel, or is listed in a directory. Organization access is limited to relationship-scoped records, role permissions, worker privacy settings, explicit consent where required, and the feature being used. SparkShift does not sell raw worker, union, location, message, voice, or jobsite records, and it is not designed for hidden individual employment scoring.

Illustrative electrician workbench with hand tools, cable and technical drawings

Buy for the work.
Build a kit that lasts.

Illustrative workbench. Guides identify exact models and buying considerations.

Gear & Deals

The right next tool.
A more useful buying guide.

From your first tool bag to the next job, start with what the work calls for. Explore practical kit guides before you buy.

Build your first apprentice kit

Start with the personal hand tools you need, then check your employer or program's tool list before adding more.

Explore the apprentice kit

Choose tools for your trade path

Compare apprentice and journeyman lists, task needs, and exact-model details so the next tool earns its place in your bag.

Find your tool list

Check current Amazon offers

Browse available offer information and verify the final price, availability and exact model on Amazon before buying.

See current offers

As an Amazon Associate I earn from qualifying purchases. Prices and availability can change. Review our affiliate disclosure and buying-guide methodology.

Common Questions

Common Questions About SparkShift

Get quick answers about hour tracking, Apple Watch support, crew radio validation, the forum, maps, calculators, directory, and what to verify before relying on exports or submissions.

What is SparkShift and who is it for?

SparkShift is a worker-first app for apprentices, journeymen, and foremen. Log OJT hours, run electrical calculators, start test prep with a free practice test, and use the electrician forum and the jobsite map inside the iPhone app. Your hours are your own record.

Is SparkShift free for apprentices and journeymen?

Core apprentice hour tracking and the public web calculators are free. Creating an OJR is free; a signed OJR PDF from the web creator costs $1.99. Exam prep and SparkShift Pro are paid, and prices and terms are shown before purchase.

Which electrical calculators can I use?

SparkShift offers 44 free public web calculators, including wire size, voltage drop, conduit fill, box fill, and motor full-load current. Check each tool's supported NEC or CEC edition, assumptions, local amendments, and project conditions before relying on a result.

How does SparkShift help me document OJT hours?

Log each workday in the iPhone app under your program's work categories, with notes, and see weekly and monthly totals. Export your records to fill in the form your program or licensing board asks for; your supervisor still signs that form. For OJRs (on-the-job reviews), the free OJR creator collects your supervisors' signatures by private QR link. Programs and licensing authorities set their own documentation and approval rules, so confirm them before you submit.

Which devices does SparkShift run on?

SparkShift runs on iPhone and iPad with iOS or iPadOS 16.2 or later, according to the App Store listing reviewed on October 12, 2026. The calculators, OJR creator, and practice tests also work in any current browser. An Apple Watch companion is in testing and is not part of the current App Store build.

Is there an Android app?

Not yet. SparkShift is not on Google Play. On an Android phone you can use the free web calculators, the OJR creator, and the free practice test in your browser.

Does my contractor or union see my hours?

Not by default. SparkShift is worker-first. Contractors, training programs, union halls, schools, associations, and other organizations do not receive raw worker data merely because a worker appears on a jobsite, selects a program, joins a channel, or is listed in a directory. Organization access is limited to relationship-scoped records, role permissions, worker privacy settings, explicit consent where required, and the feature being used.
SparkShift feature icon

Need a real answer?

Email a human at admin@sparkshift.app

The app follows the work

Phone, wrist, map, forum—and radio when it is ready.

Watches and crew tools make SparkShift useful between hour logs. Crew radio remains in field testing. Check current availability before using it on a job.

SparkShift — Your job on your wrist. Apple Watch showing a running task timer, crew updates, notifications and quick actions beside a hard hat with the SparkShift sticker.
Apple Watch companion

Your job. On your wrist.

Check your task timer, catch crew updates, and see notifications without pulling out your phone. Your iPhone keeps the companion connected.

Illustrative campaign image. Radio features remain in field testing. Review current device support before downloading.

See iPhone & Watch options
Electrician checking a phone and Apple Watch in an electrical equipment room, wearing a hard hat with the SparkShift sticker
iPhone & Apple Watch

Keep the job close at hand.

Your phone holds the details. Your Watch keeps quick checks within reach between tasks.

Illustrative campaign image.

Crew radio — FIELD TESTING

Help test crew radio on the job.

We are testing private crew channels, phone and Watch controls, and recovery when service drops. Join the field-test list to share feedback before public availability.

Join the PTT field-test list
  • Private crew channels
  • Talking and listening between phones
  • Reconnect after a dropped signal
  • Phone and paired-Watch controls
  • Clear availability and usage terms
Illustrative electrician using an Android phone and round Wear OS watch during crew coordination
Wear OS path · in testing

Wear OS companion support is in testing.

Android and Wear OS support, including Galaxy Watch, is still in testing. Public Android downloads are not available yet.

Illustrative campaign image. Wear OS support remains a preview.

Apprentice? See every free apprentice tool: the hours tracker, the OJR creator, the 8,000-hour guide, a practice test, and calculators.

Facts checked

SparkShift at sparkshift.app is made by SparkShift, LLC for U.S. electricians and is not affiliated with other apps that use a similar name. What is SparkShift?

Prices, devices, platform status and privacy answers above were checked against:

SparkShift feature iconReady to see the worker-first app path?

Keep Hours, Crew Context, and Trade Tools in One Workflow.

SparkShift starts with the electrician workflow: mobile hour logs, Apple Watch companion actions, forum threads, test prep, maps, and free calculators that stay close to the work.Review the live app surface first, then decide whether to download the iPhone app or start with the free web tools.

  • Free calculators and directory before signup
  • Forum and test prep available on the web
  • Apple Watch companion and jobsite maps on iPhone
  • Android public rollout is not live yet