Ohmly vs Resistor color decoder
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ohmly
Read full descriptionHide full description
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/
Resistor color decoder
Read full descriptionHide full description
App that let you calculate theoretical resistance from resistor color code and real tolerance resistance range.
Screenshots
Verdict
The clearest difference is ads: Ohmly at none against Resistor color decoder's shown. Resistor color decoder's advantage is update cadence (every 9 days vs every 3 weeks) and iOS requirement (17.0 vs 26.0). 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.
Ohmly ships an update every 3 weeks, Resistor color decoder every 9 days. The most recent releases landed on July 30, 2026 and September 9, 2026 respectively.
| Parameter | Ohmly | Resistor color decoder |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks | Every 9 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPad |
| Requires iOS | 26.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Adam Wilkie | Michal Pajdak |
In-app purchases
Ohmly
No in-app purchases
Resistor color decoder
No in-app purchases
Questions
Is Ohmly free?
Is Resistor color decoder free?
Do Ohmly or Resistor color decoder have ads?
Which is updated more often, Ohmly or Resistor color decoder?
Other comparisons
