Ohmly vs Chargemetrix
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
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 organizedβwithout ads. 26 PRO TOOLS β’ Ohm's law, resistor color code, SMD resistor code β’ Series/parallel resistance, voltage divider, LED resistor β’ Reactance, resonance, AC impedance, power factor β’ RC/RL/LC filters, decibels, op-amp gain, 555 timer β’ Voltage drop, wire gauge/AWG, three-phase power β’ Motor FLA, conduit fill, short-circuit current β’ Transformer ratio, LM317 regulator β’ Capacitor code, inductor color code, PCB trace width β’ Heat sink thermal resistance and battery life WHY OHMLY β’ Clean light and dark modes with no ads β’ Shared display metrics across every tool β’ Save, label, and search calculations β’ Export multi-calculation PDF reports β’ Home Screen, Lock Screen, and StandBy widgets β’ 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/
Chargemetrix
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Chargemetrix is the go to application for monitoring your batteries anywhere in the world! Using our chargemetrix hardware to send monitoring data via 4G, it allows you to set notifications and track the status of all systems.
Screenshots
Verdict
The clearest difference is update cadence: Chargemetrix at every 5 days against Ohmly's every 3 weeks. Chargemetrix also leads on iOS requirement (15 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· 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, Chargemetrix every 5 days. The most recent releases landed on October 27, 2026 and September 20, 2026 respectively.
| Parameter | Ohmly | Chargemetrix |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks | Every 5 days β better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, Apple Watch β better | iPhone, iPod |
| Requires iOS | 26.0 | 15 β better |
| Further details β not scored | ||
| Size | 7 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Adam Wilkie | Metrix Advanced Technologies |
In-app purchases
Ohmly
No in-app purchases
Chargemetrix
No in-app purchases









