Report updated May 26, 2026
Ohms Law
For professional electricians and electrical contractors requiring on-site calculation and regulatory reference tools.
Ohms Law is an established utilities app that is completely free. With a 4.2/5 rating from 120 reviews, it shows polarized user reception.
What is Ohms Law?
Ohms Law is a utility calculator for power, current, resistance, and voltage on iOS and Android.
Users hire this app for quick, on-site electrical calculations, but the lack of regulatory data forces professionals to switch to more comprehensive toolkits for final project verification.
Current Momentum
v1.3 · 10mo ago
Maintenance- Ships cross-platform utility suite updates.
- Maintains stable rating across 120 reviews.
Active Nemesis
Conduit Bending
By xNeat.com
Other Rivals
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What makes this app unique?
What Does It Look Like?
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What Are The Key Features?
Calculates Voltage, Current, Resistance, and Power by requiring input of any two variables
Collection of electrical tools and reference apps available on iOS, Android, Windows, and Mac
Links to professional certification software based on BS 7671, BS 7909, BS 5839, and BS 5266
How much does it cost?
- Free app with ad support
Ad-supported model monetizes high-frequency utility usage among free-tier electricians.
Who Built It?
Enrichment in progress
Publisher profile available very soon
What other apps does Pro Certs Software make?
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What do users think recently?
Analysis in progress, available soon
View the full user-sentiment analysis
Mood gauge, ratings & review-volume history, every praise / complaint / request, and sentiment over time.
What is the competitive landscape for Ohms Law?
Where is it available?
Localized markets (1)
How's The Utilities Market?
Market outlook for this category
Available very soon
The rivals identified
Nemeses(1)
This app captures the same professional electrician demographic by solving complex field math problems that often accompany basic Ohm's Law calculations.
Differentiators
- Integrates NEC reference data, providing regulatory compliance that simple calculators cannot offer to professional contractors.
- Features a specialized conduit calculation engine that addresses specific physical installation challenges beyond basic electrical theory.
- Maintains a high release cadence, signaling a robust development cycle that keeps the tool relevant for professionals.
Head to head
The target app should pivot toward a 'quick-calc' utility niche or integrate broader electrical reference data to prevent user churn to more feature-rich toolkits.
Contenders(4)
It competes directly by offering specialized electrical power conversions that extend the utility of basic Ohm's Law calculations.
Differentiators
- Provides specific support for three-phase power calculations, a critical gap in basic Ohm's Law calculators.
- Boasts a significantly larger user base and review volume, establishing higher social proof within the category.
WAGO leverages its industry-standard hardware reputation to provide a utility app that bridges the gap between calculation and component selection.
Differentiators
- Connects users directly to a dealer search and product catalog, creating a tangible path to monetization.
- Offers offline planning tools that ensure utility for electricians working in remote or signal-deprived job sites.
This app is a direct competitor for the professional electrician's attention, bundling Ohm's Law with broader electrical sizing and code-based tools.
Differentiators
- Includes equipment-specific sizing features that provide higher value to licensed contractors than generic calculators.
- Backed by a well-known industry educator, providing a level of trust and authority that independent apps lack.
It targets the broader electronics engineering market, offering a massive suite of tools that dwarfs the target app's single-function focus.
Differentiators
- Includes advanced PCB and signal integrity tools, catering to hardware engineers rather than just field electricians.
- Provides a comprehensive RF and analog essentials suite, making it a one-stop shop for electronics hobbyists.
Same space(3)
While in a different technical domain, it shares the 'single-purpose utility' category and competes for the same limited mobile screen real estate.
Differentiators
- Features terrain-specific optimization logic that provides specialized value for heavy machinery and agricultural equipment operators.
- Utilizes a dual-mode interface to accommodate both quick-check users and those requiring advanced technical adjustments.
It occupies the same 'niche utility' space, serving professionals who need specific calculations to ensure safety and operational efficiency.
Differentiators
- Focuses heavily on safety and efficiency optimization, aligning the tool with corporate liability and maintenance standards.
- Maintains a long-standing presence in the market, providing a stable, albeit dated, utility for agricultural professionals.
It is a specialized calculator for water chemistry, competing for the same 'professional field tool' user base as the target app.
Differentiators
- Integrates an educational academy platform, turning a simple calculator into a recurring engagement and learning hub.
- Includes a rewards program that incentivizes long-term app retention and brand loyalty among pool service professionals.
Compare Ohms Law against every rival
All rivals in one side-by-side table — identity, store metrics, ratings & sentiment, and strategic intel — plus a head-to-head page for each.
The outtake for Ohms Law
Strengths to defend, gaps to attack
Core Strengths
- Cross-platform availability ensures utility across diverse hardware environments
- Integration with professional certification software drives B2B lead generation
Critical Frictions
- Absence of NEC or BS-standard reference data limits professional adoption
- Ad-supported model creates friction for high-frequency users
Growth Levers
- Integration of offline regulatory reference tables would capture professional-grade market share
- Wearable companion apps could provide quick-calc utility on-site
Market Threats
- Competitors with bundled code-compliance tools drain the professional user segment
- High-cadence rivals like Conduit Bending erode the utility-app market share
What are the next best moves?
Integrate offline regulatory reference tables because professional users churn to code-compliant toolkits → increase professional retention
Competitor analysis shows rivals like Conduit Bending capture users through NEC/BS-standard data.
Trade-off: Pause the cross-platform UI refresh — regulatory data has higher impact on professional retention.
Audit ad-frequency because user feedback flags ad-supported models as friction points → improve session length
Ad-supported model is the primary monetization lever but risks churn in a utility category.
Trade-off: Same-quarter capacity available — no major lever displaced.
A counter-intuitive read
The app's simplicity is its primary vulnerability, as the 'quick-calc' utility niche is being rapidly commoditized by professional-grade toolkits that offer code-compliance as a standard feature.
Feature Gaps vs Competitors
- NEC/BS-standard reference data (available in Conduit Bending but absent here)
- Three-phase power calculations (available in kVA but absent here)
Key Takeaways
Ohms Law holds its ground through a simple, focused interface, but the lack of regulatory data forces professional users to switch to more robust toolkits, so revenue growth hinges on integrating code-compliance references to lock in the contractor segment.
Where Is It Heading?
Stable
The utility-app market is consolidating around professional-grade toolkits that provide regulatory compliance, leaving single-function calculators like Ohms Law exposed. Without a pivot to include code-based reference data, the app will likely see continued churn among professional users who require more than basic Ohm's Law math.
Competitors bundling code-compliance tools drain the professional user segment, which forces the subject app into a lower-value hobbyist niche.
Recent updates focused on maintenance rather than feature expansion, signaling a lack of active investment in the core utility.