Ohmulator vs Ohmly
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ohmulator
This electric circuit calculator simplifies Ohm's Law calculations. It allows users to input two known variables (current, resistance, voltage, or power) and automatically computes the unknown values. The app also supports on-the-fly unit adjustments, eliminating the need for manual conversions.
- Ohm's Law calculations
- Calculate unknown variables
- Adjustable unit types
- Total resistance calculator
- Supports Voltage, Current, Resistance, Power
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Makes Ohm's Law simple! Ohmulator is a simple, yet robust, electric circuit calculator that enables you to quickly find the unknown variables of a circuit. Ohmulator allows you to easily adjust unit types on the fly (eg. milli Amps, Amps, kilo Amps), which means no prior conversion! Enter two known variables (from: I = Current, R = Resistance, V = Voltage, P = Power), set preferred units, then Ohmulator will calculate and return the previously unknown values. Also an effective (total) resistance calculator. What two App Store reviewers had to say about Ohmulator: "Great. Does what it says. Very good app. Stylish design." 5 Stars - Jamie1990jamie "Awesome app. It simply works. A must have for the radioamateur or electronic nerd. Nice to have the watt law as well." 5 Stars - Per67 Also available for macOS on the Mac App Store.
Ohmly
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Your electrical toolkit, redesigned for speed. 26 pro tools, one clean app. Ohmly is the modern electrical calculator for electricians, students, and engineers. Solve VIRP calculations, decode resistor and SMD codes, check voltage drop, size conductors, design circuits, and keep your work organized—without ads. 26 PRO TOOLS • Ohm's law, resistor color code, SMD resistor code • Series/parallel resistance, voltage divider, LED resistor • Reactance, resonance, AC impedance, power factor • RC/RL/LC filters, decibels, op-amp gain, 555 timer • Voltage drop, wire gauge/AWG, three-phase power • Motor FLA, conduit fill, short-circuit current • Transformer ratio, LM317 regulator • Capacitor code, inductor color code, PCB trace width • Heat sink thermal resistance and battery life WHY OHMLY • Clean light and dark modes with no ads • Shared display metrics across every tool • Save, label, and search calculations • Export multi-calculation PDF reports • Home Screen, Lock Screen, and StandBy widgets • Full Apple Watch companion Unlock Pro with a lifetime purchase or a low monthly plan. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is price: Ohmly at Free against Ohmulator's $0.99. Ohmly also leads on update cadence (every 3 weeks vs every 2 months). Ohmulator's advantage is iOS requirement (10.0 vs 26.0). On ads, 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
Ohmly is free to download; Ohmulator costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Ohmulator ships an update every 2 months, Ohmly every 3 weeks. The most recent releases landed on October 9, 2026 and October 2, 2026 respectively.
| Parameter | Ohmulator | Ohmly |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.7 (79 ratings) — better | — |
| Positive reviews | 81.1% of reviews | — |
| Number of ratings | 79 — better | — |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 10.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 5 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Armchair Engineering | Adam Wilkie |
In-app purchases
Ohmulator
No in-app purchases
Ohmly
No in-app purchases
Questions
Is Ohmulator free?
Is Ohmly free?
Do Ohmulator or Ohmly have ads?
Which is updated more often, Ohmulator or Ohmly?
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