--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Ohm's Law & Power Law Calculator" developer_entity: "Cressall Resistors Ltd" bundle_id: "com.cressall.PowerCalc" app_store_id: "592763080" category: "Utilities" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2017-06-12" report_date: "2026-09-02" last_verified: "2026-09-02T00:00:00.000Z" report_version: "1.7" total_reviews: 27 overall_rating: 4.4 sentiment: "Mixed" sentiment_score: 45 confidence: "low" confidence_score: 0.35 top_praise_theme: "Simple and straightforward interface allows students to perform quick calculations without unnecessary bells or whistles" top_complaint_theme: "Data entry errors occur when the app fails to lock values, causing previous inputs to disappear" review_sample_size: 17 total_review_count: 17 analyzed_review_count: 17 data_age_days: 73 momentum_velocity: "zombie" intelligence_version: 3 tags: ["utilities", "free", "mixed sentiment", "mobile app", "app review", "app analysis", "electrical", "engineering", "students,"] canonical_url: "https://marlvel.ai/apps/ohm-s-law-power-law-calculator" license: "CC-BY-NC 4.0" content_version: "v2" --- # Ohm's Law & Power Law Calculator Intelligence Report ## TL;DR {#tldr} - **Category**: Utilities · Free - **Signal**: Rating 4.44 · Sentiment Mixed - **Recent focus**: Data entry errors occur when the app fails to lock values, causing previous inputs to disappear (top complaint) · Simple and straightforward interface allows students to perform quick calculations without unnecessary bells or whistles (top praise) > **TL;DR:** Ohm's Law & Power Law Calculator is a utilities app by Cressall Resistors Ltd, rated 4.44/5 by 27 users, with Mixed user sentiment (45/100), available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Ohm's Law & Power Law Calculator shows Mixed sentiment (4.44/5 from 27 reviews) - users praise simple and straightforward interface allows students to perform quick calculations without unnecessary bells or whistles but report issues with data entry errors occur when the app fails to lock values, causing previous inputs to disappear. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.44/5 (27 reviews) | | **User Mood** | Mixed | | **Category** | Utilities | | **Developer** | Cressall Resistors Ltd | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.35/1.0) | | **Data Age** | 73d | ## Metadata & Market Performance - **Publisher:** Cressall Resistors Ltd - **Category:** Utilities - **Target Audience:** Electrical engineering students, technicians, and hobbyists requiring quick Ohm's law and power law calculations. - **Platforms:** iOS - **Version Reviewed:** 1.7 - **Report Date:** 2026-09-02 - **Signal Count:** 17 reviews analyzed - **Confidence:** Low (0.35/1.0) - **App Store ID (iOS):** 592763080 - **Bundle ID:** com.cressall.PowerCalc - **Performance Trend:** Declining - **Data Window:** Analysis based on signals collected up to 2026-09-02 ## Executive Snapshot **What it is:** 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. **Why users hire it:** The tool removes the cognitive friction of manual calculation by allowing users to lock specific electrical parameters and perform rapid "what-if" recalculations. ## App DNA (Features & Intent) - **[Differentiator] Parameter Locking:** Fixes one electrical parameter to enable rapid recalculation of remaining variables. * *User Intent:* Users expect intelligent, adaptive experiences that learn from their behavior. - **[Differentiator] Freeze Function:** Long-press action locks a parameter in a distinct color state to prevent accidental changes. - **[Standard] Multi-language Support:** Interface localization across ten languages including German, Russian, and Chinese. ## Market Position {#market-position} 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. ## Monetization Strategy - **Model:** Free - **Tiers:** Free utility with no in-app purchases - **Analysis:** The app operates as a free utility with no monetization mechanisms identified. ## 🟡 User Sentiment (Low Confidence: 17 of 17 reviews analyzed) {#user-sentiment} - **Overall Rating:** 4.44/5 - **Platform Split:** iOS 4.4/5 (27 ratings) - **Overall Sentiment:** Mixed ### Top Praises - **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** ### Top Complaints (Impact Areas) - **Data entry errors occur when the app fails to lock values, causing previous inputs to disappear** ## SWOT Analysis {#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 **Growth Levers:** - Implement high-precision floating-point math for low-power circuit design - Introduce unit-conversion toggle for international engineering standards ## Recent Changes (v2 → v3) {#recent-changes} 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. **Overall trend**: Declining **Compared at**: 2026-09-02 ### High-impact changes - **[Shifted] Outlook Trend Downgrade** (positioning) ### Medium-impact changes - **[Added] Expanded Threat Profile** (swot) - **[Added] New Opportunity Identified** (swot) - **[Shifted] Contrarian Perspective Pivot** (positioning) ## What's New - **Latest (v1.7, 9 years ago):** Technical update for watchOS 27 compatibility and 64-bit iOS support with minor UI refinements. ## App Momentum (Zombie) {#momentum} - No feature updates in nine years. - Maintains stable, ad-free utility status. > **Cadence:** 1 total versions · 0 majors in last 6 months · 3369 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Ohm's Law & Power Law Calculator is an utilities app that is completely free. With a 4.44/5 rating from 27 reviews, it shows mixed user reception. > **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. **Best for:** Electrical engineering students, technicians, and hobbyists requiring quick Ohm's law and power law calculations. ### PM Action Plan (Next Best Moves) - [ ] [MAINTAIN] Audit data-locking logic because users report input overwrites → reduce negative sentiment ### Outlook: Declining 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. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.44/5 | | Total Reviews | 27 | | Sentiment | Mixed (45/100) | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Trend | Declining | | Outlook | Declining | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Ohm's Law & Power Law Calculator** (this app) | 4.44/5 | Mixed | Cressall Resistors Ltd | | [Sota Connect: Secure Network](https://marlvel.ai/apps/fi-catconnect-sota) | 4.8/5 | N/A | Cat Connect | | [V2Box - V2ray Client](https://marlvel.ai/apps/v2box-v2ray-client) | 4.6/5 | n/a | techlaim | | [avoVPN Desktop](https://marlvel.ai/apps/avovpn-desktop) | N/A/5 | N/A | Avocado VPN Technologies | | [Free VPN by Free VPN .org™](https://marlvel.ai/apps/free-vpn-by-free-vpn-org) | 4.5/5 | Mixed | Free VPN LLC | | [Fusvob VPN : Super VPN 2026](https://marlvel.ai/apps/com-toplinkc-foxexcellent) | 4.5/5 | Mixed | Fuxin Technology | ## Company Profile - **Developer:** Cressall Resistors Ltd ## Data Sources & Links - **App Store ID:** 592763080 - **Sources:** App store metadata, User reviews. ## Related Intel Reports - [*Sota Connect: Secure Network*](https://marlvel.ai/apps/fi-catconnect-sota) (Cat Connect) · 4.8/5 Rating - [*V2Box - V2ray Client*](https://marlvel.ai/apps/v2box-v2ray-client) (techlaim) · 4.6/5 Rating - [*avoVPN Desktop*](https://marlvel.ai/apps/avovpn-desktop) (Avocado VPN Technologies) · N/A Rating - [*Free VPN by Free VPN .org™*](https://marlvel.ai/apps/free-vpn-by-free-vpn-org) (Free VPN LLC) · 4.5/5 Rating - [*Fusvob VPN : Super VPN 2026*](https://marlvel.ai/apps/com-toplinkc-foxexcellent) (Fuxin Technology) · 4.5/5 Rating - [*Potatso*](https://marlvel.ai/apps/potatso) (Potatso Lab LTD) · 4.4/5 Rating - [*Quantumult X*](https://marlvel.ai/apps/quantumult-x) (Cross Utility Ltd) · 3.8/5 Rating - [*카톡 분석 - 오픈채팅, 카톡 채팅 분석, 통계, 검색*](https://marlvel.ai/apps/com-liger-katalkanalysispaid) (Park Sung Cheol) · N/A Rating - [*로또 황금번호 생성기*](https://marlvel.ai/apps/lotto-lottogold) (jaehwan lee) · N/A Rating - [*도사폰 (만세력 역학도구)*](https://marlvel.ai/apps/app--656) (Softchaser Company Limited) · 5.0/5 Rating ## Frequently Asked Questions {#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. ## Methodology {#methodology} This report was generated by Marlvel.ai's 5-stage AI intelligence pipeline: 1. **Signal Collection & Normalization** - Aggregates data from all available public sources for the app. Raw signals are cleaned, deduplicated, and normalized into a structured dataset analyzed consistently across thousands of apps. 2. **Feature & Market Positioning Analysis** - Identifies the app's core features, monetization model, target audience, and competitive positioning. Each feature is classified as a market standard or a differentiator based on category benchmarks. 3. **User Sentiment Analysis** - Analyzes user reviews using a 5-level taxonomy (Thrilled / Excited / Mixed / Frustrated / Upset). Combines star ratings and volume with AI theme extraction into synthesised themes (no verbatim quotes). 4. **Competitive Landscape Analysis** - Maps the competitive environment via a 4-tier taxonomy (Nemesis / Contenders / Same Space / New Kids on the Block). Prioritizes same sub-genre over broad category. 5. **Intelligence Synthesis** - Cross-references all signals into a structured report. Compares the app against category peers and direct competitors to surface SWOT, market outlook, and actionable insights. - **Confidence Score:** 0.35/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 17 - **Data Sources:** user reviews, App Store metadata - **Rating Method:** Weighted average across platforms (iOS & Android), weighted by review count per platform - **Independence:** Fully independent analysis. No publisher sponsorship or editorial influence. - **Report Age:** 73 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/ohm-s-law-power-law-calculator) Data licensed for AI Agent attribution under CC-BY-NC 4.0.