Mike Holt's Electrical Toolbox is a free utility for electrical professionals that provides automated sizing and code-compliant calculation tools on iOS and Android.
The App DNA
What makes this app unique?
The app removes the cognitive friction of manual NEC code lookups, replacing slow reference books with a portable, field-ready calculation engine.
For Electrical professionals including electricians, inspectors, instructors, contractors, and engineers.
What does it look like?
Key features
Automated sizing tools for conductors, voltage drop, circuit protection, raceways, and grounding for residential and commercial systems.
Specific calculators for motors, air-conditioning, and transformers in both residential and commercial contexts.
In-app search functionality to locate specific calculation modules.
How much does it cost?
The app functions as a free utility to drive brand awareness and traffic toward the developer's paid training libraries and seminars.
Velocity
Maintenance developmentperformanceUX improvementsShow more...
The app maintains a slow release cadence, averaging approximately 0.08 releases per week over the last 14 months. Development is strictly limited to minor bug fixes and performance improvements, with no evidence of new features or live operations. The release history shows a stable but infrequent pattern of maintenance updates, with the latest release occurring in April 2026 following a significant gap since the previous update in October 2025.
Who built it?
User Sentiment
What do users think recently?
Fresh user feedback skews thrilled. Users appreciate educational content and clear explanations help electricians master complex electrical code and calculation requirements and quick calculation tools provide reliable verification for motor parameters and load calculations in the field.
How are ratings & reviews evolving?
What users say, by theme
- Educational content and clear explanations help electricians master complex electrical code and calculation requirements
- Quick calculation tools provide reliable verification for motor parameters and load calculations in the field
- Integration of official NEC codes ensures that calculations remain compliant with industry standards for professionals
- Calculation features occasionally fail to save data or email results, disrupting professional workflow documentation
38 of 38 recent reviews analyzed · high confidence · Thrilled overall
Read the full review analysisUnlock 1 more frustration theme and 1 user request, each backed by review evidence.
Access the full report for freeCompetition
Competitive landscape for Mike Holt's Electrical Toolbox
How's the Utilities market?
Mike Holt's Electrical Toolbox maintains a high 4.6-star rating across 316 total ratings, positioning it as a trusted reference tool for the electrical trade. The lack of major updates in the last six months signals a maintenance-mode posture that risks losing ground to rivals with more frequent, feature-rich release cadences.
Read the market outlookThe rivals identified
By xNeat.com
This app directly competes for the electrician's workflow by focusing on the physical installation and geometry calculations required on the job site.
- Offers specialized conduit calculation engines that go beyond the general sizing tools in our app.
- Provides advanced geometry calculators specifically designed for complex pipe bending tasks on the job site.
- Maintains a significantly higher release cadence, ensuring the tool stays current with modern field requirements.
Unlock the head-to-head verdict: where this rival wins, and where it loses.
Access the full report for freeThe Analyst's Read
Key takeaways for Mike Holt's Electrical Toolbox
Where is it heading?
The electrical utility market is consolidating around tools that offer both code compliance and specialized physical installation geometry. Mike Holt's Electrical Toolbox remains advantaged by its brand authority, but the lack of feature expansion risks ceding the daily-use slot to rivals that ship more frequently.
- Maintenance-only release cadence (no major updates in 6 months) leaves the app vulnerable to rivals with faster, feature-driven development cycles.
- High user satisfaction with core NEC-compliant tools suggests the brand authority remains a strong retention lever for the professional audience.
The SWOT
- Brand authority via Mike Holt Enterprises drives high-intent traffic to training libraries.
- NEC-compliant calculation modules provide a defensible utility barrier for professional users.
- Broad suite of sizing tools covers residential and commercial electrical needs.
- Integrate picture-in-picture video support to capture multitasking professional learners.
- Expand conduit configuration settings to include specific types like EMT to improve field utility.
Next best moves
Ship fix for calculation data persistence because users report failed saves/emails → restore professional workflow reliability
+ 1 more prioritized moveThe counter-intuitive read
The app's maintenance-mode status is a feature, not a bug…
Read the full takeFeature gaps
Advanced conduit geometry calculators (available in Conduit Bending but missing here) +1
Since the last report: Technical reliability issues regarding data persistence and limited conduit configuration options have emerged as primary friction points, forcing a pivot in product priorities toward core workflow stability.
Bottom line
Fixing data persistence bugs would restore the app's reliability as a primary field reference, which is the core value proposition driving its brand authority. Maintaining this utility is essential to prevent professional users from migrating to more frequently updated, niche-specific calculators.
Unlock 3 critical frictions, 1 market threat, 1 more prioritized move and the analyst’s take.
Access the full report for freeFAQ
Is Mike Holt's Electrical Toolbox suitable for professional electrical engineers?
How does this app compare to specialized conduit bending calculators?
Are there any known issues with saving calculations?
What are some alternatives for electrical law calculations?
Sources
- [1] App Store, source
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