Cable Calc+ vs Ohms Law
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Cable Calc+
This tool assists electrical contractors by calculating cable selection and voltage drop for installations up to 25KW and 100A. It supports various cable types and includes reference methods, educational videos, and a guide to electrical test instruments.
- Cable selection calculator
- Voltage drop calculator
- Supports various cable types (SWA, Fire proof, Tri rated, Twin and earth)
- Reference methods
- Electrical test instrument guide
- Educational videos
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For over 100 years, Megger has been the premier provider of electrical test equipment and measuring instruments for power applications. The free iPhone app includes a Cable Calc tool useful to every electrical contractor Features: A comprehensive cable selection & volt drop calculator tool. for installations up 25KW 100A. Cables include: √ SWA 2, 3 and 4 core XLPE √ SWA 2, 3 7 4 core PVC √ Fire proof √ Tri rated √ Twin and earth With a range of reference methods A guide to the use of electrical test instruments Videos Plus more
Ohms Law
This utility app calculates voltage, current, resistance, and power using Ohm's Law. Simply input any two values, and the app will compute the remaining two, providing a comprehensive tool for electrical calculations.
- Calculate Voltage
- Calculate Current
- Calculate Resistance
- Calculate Power
- Input two values to find others
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Ohms Law calculator for calculating power, current, resistance and voltage. Ohms Law Calculator Features: - Calculate Voltage (volts) - Calculate Current (amps) - Calculate Resistance (ohms) - Calculate Power (watts) Input any two values to calculate the other two. Ohms Law Formula: V = Voltage I = Current R = Resistance P = Power V / IxR (or P) An advanced Ohms Law calculator to calculate Voltage, Current, Resistance & Power. How to use: 1) Enter any two values to calculate the other two. 2) Tap calculate. A Voltage Calculator, Current, Resistance, Power calculator all in one app. Check out our collection of electrical apps for iPhone and iPad https://www.procertssoftware.com/apps/
Screenshots
Verdict
The clearest difference is ads: Cable Calc+ at none against Ohms Law's shown. Cable Calc+ also leads on update cadence (every 4 months vs every 16 months) and monetization model (free vs ad-supported). Ohms Law's advantage is review sentiment (70% vs 38%) and rating (4.3 vs 4.0). On price, in-app purchases and device support 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. Neither carries in-app purchases, so what you see is what you pay.
Ohms Law holds the better App Store score, 4.3 against 4.0. Both are backed by a comparable volume of ratings — 2 and 7 respectively. Written reviews point the same way: 38% of Cable Calc+'s written reviews are positive against 70% of Ohms Law's.
Cable Calc+ ships an update every 4 months, Ohms Law every 16 months. The most recent releases landed on September 16, 2026 and September 6, 2026 respectively.
| Parameter | Cable Calc+ | Ohms Law |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (2 ratings) | 4.3 (7 ratings) — better |
| Positive reviews | 37.5% of reviews | 70.0% of reviews — better |
| Number of ratings | 2 | 7 — better |
| Update frequency | Every 4 months — better | Every 16 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 3 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Megger | Pro Certs Software Ltd |
Customer experience
Cable Calc+
Ohms Law
In-app purchases
Cable Calc+
No in-app purchases
Ohms Law
No in-app purchases
Questions
Is Cable Calc+ free?
Is Ohms Law free?
Which has better reviews, Cable Calc+ or Ohms Law?
Do Cable Calc+ or Ohms Law have ads?
Which is updated more often, Cable Calc+ or Ohms Law?
Other comparisons
