Ohms Law vs Karpro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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/
Karpro
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Karpro是一款手机控车软件，通过安装我们的Karpro控制主机，您可以通过app和主机通信，实现开锁、关锁、启动、熄火功能。同时也可以通过app查看车辆的实时位置，行车记录。
Screenshots
Verdict
The clearest difference is ads: Karpro at none against Ohms Law's shown. Karpro also leads on update cadence (every 2 months vs every 16 months). On price, in-app purchases, 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. Neither carries in-app purchases, so what you see is what you pay.
Ohms Law ships an update every 16 months, Karpro every 2 months. The most recent releases landed on October 23, 2026 and October 8, 2026 respectively.
| Parameter | Ohms Law | Karpro |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (7 ratings) — better | — |
| Positive reviews | 70.0% of reviews | — |
| Number of ratings | 7 — better | — |
| Update frequency | Every 16 months | Every 2 months — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 12 MB | 79 MB |
| Age rating | 4+ | 4+ |
| Developer | Pro Certs Software Ltd | 深圳市卓联启航科技有限公司 |
In-app purchases
Ohms Law
No in-app purchases
Karpro
No in-app purchases
