Ohms Law
Ohms Law is a utility app for calculating electrical power, current, resistance, and voltage on iOS and Android.
The App DNA
What makes this app unique?
The app removes the friction of manual electrical math for field technicians, serving as a gateway to the developer's paid certification services.
For UK-based electricians and car audio enthusiasts requiring quick, on-site electrical reference tools.
What does it look like?
Key features
Calculates voltage, current, resistance, and power by requiring only two input values.
Access to technical charts and reference data for electrical calculations.
How much does it cost?
The app operates as a free, ad-supported utility designed to funnel users toward the developer's paid certification software.
Velocity
Maintenance developmentperformanceUX improvementsShow more...
The app has shipped only two releases in the last 10 months, resulting in a maintenance-level cadence of approximately 0.05 releases per week. Development is currently focused on minor technical updates, including platform-specific compatibility for Android 35 and general performance optimizations. There is no evidence of new feature development or live operations. The release history indicates a stable but minimal maintenance cycle.
Who built it?
Pro Certs Software
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Cable CalculatorUser Sentiment
What do users think recently?
Recent user voice shows an excited sentiment. Users appreciate the calculator provides a simple and convenient way to perform essential car audio math calculations and users appreciate the utility of the app for specific technical tasks within the car audio hobby.
How are ratings & reviews evolving?
What users say, by theme
- The calculator provides a simple and convenient way to perform essential car audio math calculations
- Users appreciate the utility of the app for specific technical tasks within the car audio hobby
- Intrusive advertisement placement interrupts the typing experience and clutters the user interface during calculations
34 of 34 recent reviews analyzed · high confidence · Excited overall
Read the full review analysisUnlock 2 more frustration themes and 2 user requests, each backed by review evidence.
Access the full report for freeCompetition
Competitive landscape for Ohms Law
How's the Utilities market?
Ohms Law maintains a stable utility presence with a 4.28 rating across 120 total ratings. The lack of major updates over the last 10 months signals a maintenance-mode position that limits its ability to compete with high-cadence rivals.
The rivals identified
By xNeat.com
This app captures the same professional electrician demographic by solving complex field math problems that often accompany basic Ohm's Law calculations.
- 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.
kVA (Single and Three Phase)Contender
WAGOContender
Mike Holt's Electrical ToolboxContender
Electrical Engineering ToolkitContenderUnlock 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 Ohms Law
Where is it heading?
The market for field-utility calculators is consolidating around apps that offer regulatory compliance and broader project-workflow support. Ohms Law remains exposed to churn as its maintenance-mode cadence prevents it from answering the feature-rich toolkits currently capturing the professional electrician demographic.
- The 10-month gap since the last major release signals a maintenance-only posture that leaves the app vulnerable to feature-rich competitors.
- Intrusive ad placement interrupts the typing experience, which compounds the frustration already visible in the mixed sentiment score.
The SWOT
- Lightweight interface reduces cognitive load for quick math
- Cross-platform availability increases user reach
- Introduce paid ad-free tier to improve usability
- Integrate regulatory reference data to increase professional utility
Next best moves
Ship ad-free paid tier because ad placement is the top-cited user complaint → improve retention
+ 1 more prioritized moveThe counter-intuitive read
The app's maintenance-mode status is actually a strength for its target demographic…
Read the full takeFeature gaps
Regulatory reference data (available in Conduit Bending but missing here) +1
Since the last report: User feedback now highlights specific workflow friction caused by aggressive ad placement and interface limitations, while the app's strategic role has been clarified as a lead-generation funnel for the developer's paid certification services.
Bottom line
Ohms Law's utility as a quick-calc tool is undermined by aggressive ad placement that disrupts the professional workflow. Introducing an ad-free tier would unlock revenue from the existing user base while mitigating the primary driver of negative sentiment.
Unlock 3 critical frictions, 2 market threats, 1 more prioritized move and the analyst’s take.
Access the full report for freeFAQ
Is Ohms Law suitable for professional electricians?
Does Ohms Law have intrusive advertisements?
What is a good alternative to Ohms Law?
Sources
- [1] Play Store listing
Report last updated