Ohm's Law & Power Law Calculator

Ohm's Law & Power Law Calculator

By Cressall Resistors

Ohm's Law & Power Law Calculator is a specialized utility for electrical engineering students and technicians to perform Ohm's Law and Power Law calculations on iOS.

The App DNA

What makes this app unique?

The tool removes the cognitive friction of manual calculation by allowing users to lock specific electrical parameters and perform rapid "what-if" recalculations.

For Electrical engineering students, technicians, and hobbyists requiring quick Ohm's law and power law calculations.

What does it look like?

Key features

Parameter Lockingedge

Fixes one electrical parameter to enable rapid recalculation of remaining variables.

Freeze Functionedge

Long-press action locks a parameter in a distinct color state to prevent accidental changes.

Multi-language Supportstandard

Interface localization across ten languages including German, Russian, and Chinese.

How much does it cost?

freeFree utility with no in-app purchases

The app operates as a free utility with no monetization mechanisms identified.

Velocity

Dormant developmentplatform expansionUX improvementsShow more...

The app has reached a zombie state, with no updates or feature releases in over nine years. The latest release, which focused on platform compatibility and minor interface adjustments, dates back to June 2017. There is no evidence of ongoing development or maintenance activity.

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Who built it?

Cressall Resistors

1 app tracked · Utilities

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User Sentiment

What do users think recently?

Fresh user feedback skews mixed. Users appreciate simple and straightforward interface allows students to perform quick calculations without unnecessary bells or whistles and ad-free experience provides a clean environment for users who need to focus on technical calculations.

How are ratings & reviews evolving?

App Store
4.44 · 27

What users say, by theme

What Users Love
  • Simple and straightforward interface allows students to perform quick calculations without unnecessary bells or whistles
  • Ad-free experience provides a clean environment for users who need to focus on technical calculations
What Frustrates Users
  • Data entry errors occur when the app fails to lock values, causing previous inputs to disappear
+ 1 more theme

17 of 17 recent reviews analyzed · moderate confidence · Mixed overall

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Unlock 1 more frustration theme, each backed by review evidence.

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Competition

Competitive landscape for Ohm's Law & Power Law Calculator

How's the Utilities market?

Ohm's Law & Power Law Calculator maintains a 4.44-star rating across 27 total ratings, though the lack of updates since 2017 suggests a stagnant market position.

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The rivals identified

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The Analyst's Read

Key takeaways for Ohm's Law & Power Law Calculator

Where is it heading?

The market for engineering utilities is consolidating around apps with frequent update cadences and high-precision calculation support. Ohm's Law & Power Law Calculator remains exposed due to its stagnant development, and the lack of response to user-reported data-entry bugs will likely accelerate churn as the user base migrates to more reliable, modern alternatives.

  • The nine-year development gap (no updates since 2017) signals the product is in maintenance mode, which prevents it from addressing modern precision requirements.
  • Persistent data-entry errors in the locking mechanism erode user trust, which compounds the churn risk as students seek more reliable, updated alternatives.

The SWOT

Core Strengths
  • Parameter-locking mechanism enables rapid "what-if" recalculation
  • Ad-free utility provides a clean environment for technical focus
  • Multi-language support facilitates international accessibility
Critical Frictions 3 weaknesses inside
Growth Levers
  • Implement high-precision floating-point math for low-power circuit design
  • Introduce unit-conversion toggle for international engineering standards
Market Threats 2 threats identified

Next best moves

1 Maintain

Audit data-locking logic because users report input overwrites → reduce negative sentiment

The counter-intuitive read

The lack of updates is a feature, not a bug…

Read the full take

Since the last report: The product's market outlook has shifted from mixed to declining due to stagnant development and unaddressed data-entry bugs. While the core feature set remains unchanged, the competitive threat landscape has been updated to reflect the risk of user migration to modern alternatives.

Bottom line

Addressing the data-locking failures would resolve the primary frustration driving negative sentiment, though the nine-year development gap suggests the product is in maintenance mode. Prioritizing stability would help retain the current student base while the lack of active development limits new growth.

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FAQ

Is Ohm's Law & Power Law Calculator suitable for professional engineering work?
While useful for students and quick homework checks, users report the tool struggles with micro-amp precision, making it less effective for professional low-power circuit design tasks.
Does Ohm's Law & Power Law Calculator contain advertisements?
No, the app is currently provided as a free, ad-free utility with no in-app purchases.
What is a reliable alternative for electrical calculations?
Users seeking more frequent updates or higher precision for low-power circuits should consider modern, actively maintained engineering calculator apps available on the App Store.

Sources

  1. [1] App Store

Report last updated

Disclosure: Independent intel to help mobile builders succeed.

AI-powered analysis with automated quality gates, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by Ohm's Law & Power Law Calculator, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

What's new

The product's market outlook has shifted from mixed to declining due to stagnant development and unaddressed data-entry bugs. While the core feature set remains unchanged, the competitive threat landscape has been updated to reflect the risk of user migration to modern alternatives.

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Outlook Trend Downgrade

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Expanded Threat Profile

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New Opportunity Identified

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Contrarian Perspective Pivot

Cite this report

Marlvel.ai. “Ohm's Law & Power Law Calculator Intelligence Report.” Updated Sep 2, 2026. https://marlvel.ai/apps/ohm-s-law-power-law-calculator

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