Ohms Law Calc. vs Southwire® Conversion Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ohms Law Calc.
This app provides a comprehensive suite of electrical calculations, including Ohm's Law, voltage drop, wire sizing, and impedance. It also offers numerous converters for various electrical units and parameters, aiding in circuit design and analysis.
- Ohm's Law calculations
- Voltage drop calculator
- Wire size calculator
- Impedance calculations (R, L, C)
- Electrical unit converters
- Power and current conversions
- Circuit design tools
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Ohm's Law Calc. consists of 60 Electrical Calculators with Formulas and Circuits and 16 Electrical Converters. • Voltage Calculator • Current Calculator • Resistance Calculator • Power Calculator • Voltage Drop Calculator • Wire Size Calculator • DC Generator Calculator • Transformer Calculations (Voltage & Current) Impedance Calculators Calculate impedance for combinations of resistors (R), inductors (L), and capacitors (C) in both series and parallel configurations: • R and L in Series / Parallel • R and C in Series / Parallel • L and C in Series / Parallel • R, L and C in Series / Parallel Power and Current Conversions • kVA to Amps (Single Phase & Three Phase) • Amps to kVA (Single Phase & Three Phase) • Single Phase & Three Phase Power Calculators • Horsepower Calculators (DC, Single Phase, Three Phase) Efficiency and Power Factor Tools • Efficiency Calculators (DC, Single Phase, Three Phase) • Power Factor Calculators (Single Phase & Three Phase) Energy Storage Calculators • Energy Cost Calculator • Energy Storage Calculators (Resistance, Inductance, Capacitance) Circuit Design Tools • Star-to-Delta and Delta-to-Star Conversions • Inductive & Capacitive Reactance Calculators • Resonant Frequency Calculator • Inductor and Capacitor Sizing Equations Component Calculations • Series and Parallel Calculators for Resistance, Inductance, and Capacitance • Unknown Resistance and Capacitance Calculators (Series & Parallel) More Calculations • Neutral Current (3-Phase Unbalanced Loads) • Characteristic Impedance (Parallel & Coaxial) • Transformer Calculator • Voltage Divider Calculator Illumination Calculators • Luminous Intensity Calculator • Luminous Flux Calculator • Solid Angle Calculator Electrical Converters • Field Strength Converter • Electrical Potential Converter • Resistance and Resistivity Converters • Conductance and Conductivity Converters • Capacitance and Inductance Converters • Charge Converters: Handles conversions for electrical charge, including: • Linear Charge Density • Surface Charge Density • Volume Charge Density • Linear Current Density • Surface Current Density • Power Converter App works with both iPhones, iPads and Mac Multiple Unit Compatibility: Supports a wide range of units for all electrical parameters, including Ohms, kiloOhms, Farads, Henrys, kVA, Volts, Weber, and more.
Southwire® Conversion Calc
This utility app facilitates conversions between copper and aluminum electrical wiring. It allows users to calculate pricing, unit of measure, conversion factors, and weight based on product length. The app comes preloaded with numerous cable types for easy calculation.
- Copper to aluminum conversion
- Aluminum to copper conversion
- Pricing unit of measure calculation
- Conversion factor calculation
- Weight per product length calculation
- Preloaded cable data
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Southwire's Conversion Calculator helps to convert copper to aluminum or aluminum to copper, pricing unit of measure, conversion factor and weight per product length. Preloaded with many cables for calculation.
Screenshots
Verdict
The clearest difference is review sentiment: Ohms Law Calc. at 50% against Southwire® Conversion Calc's 0%. Ohms Law Calc. also leads on rating (4.7 vs 4.2) and ratings volume (1.3K vs 5). Southwire® Conversion Calc's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Ohms Law Calc. sells 1 one-off in-app purchase. Southwire® Conversion Calc asks for nothing beyond the download.
Ohms Law Calc. holds the better App Store score, 4.7 against 4.2. That said, the two scores are not equally well evidenced: Ohms Law Calc. has 1.3K ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 50% of Ohms Law Calc.'s written reviews are positive against 0% of Southwire® Conversion Calc's.
Ohms Law Calc. ships an update every 2 months, Southwire® Conversion Calc every 4 months. The most recent releases landed on October 24, 2026 and October 2, 2026 respectively.
| Parameter | Ohms Law Calc. | Southwire® Conversion Calc |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (1.3K ratings) — better | 4.2 (5 ratings) |
| Positive reviews | 50.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 1.3K — better | 5 |
| Update frequency | Every 2 months — better | Every 4 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.6 | 16.6 — better |
| Further details — not scored | ||
| Size | 59 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | V PUGAZHENTHI | Southwire Company |
Customer experience
Ohms Law Calc.
Southwire® Conversion Calc
Bugs and requests
Ohms Law Calc.
Reported bugs
3 issues- Paid version not unlocking
- Repeatedly prompting for payment after already paid
- Keyboard overlaying results making it difficult to see
Requested features
3 requests- Add more electrical conversions and calculations
- Add ability to input voltage and resistance to get amps and watts
- Add kVA, rms, and other popular needed conversions
Southwire® Conversion Calc
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Ohms Law Calc.
- Ohms Law Calc.$3.99
Southwire® Conversion Calc
No in-app purchases
Questions
Is Ohms Law Calc. free?
Is Southwire® Conversion Calc free?
Which has better reviews, Ohms Law Calc. or Southwire® Conversion Calc?
Do Ohms Law Calc. or Southwire® Conversion Calc have ads?
Which is updated more often, Ohms Law Calc. or Southwire® Conversion Calc?
Other comparisons
