Ohmetra: Electronics Tools

From a quick resistor calculation to a documented electronics build, Ohmetra keeps your tools and project records together. Built for makers, students, technicians and embedded developers, it combines electronics calculators, board references and an offline project notebook. START FREE • Use 10 essential tools: Ohm's law, resistor colour codes, LED resistors, voltage dividers, battery runtime, unit conversion, and series/parallel resistors and capacitors. • Keep two editable projects with notes, saved calculations, component lists and pin plans. • Explore board profiles for Arduino UNO R3, ESP32-DevKitC V4 and Raspberry Pi 4 Model B. • Import reference PDFs and export project JSON, CSV data and PDF reports. UNLOCK OHMETRA PRO An optional monthly or yearly subscription adds: • All 52 tools, including RC/RL timing, LC resonance, wire resistance, voltage drop, op-amp gain, 555 timers, digital utilities and linear DC resistor networks. • More editable projects. • Parameter sweeps, sensitivity analysis, tolerance corners and Monte Carlo estimates for supported calculations. • Saved revisions, design comparisons and physical-build records. • Manual test procedures, entered readings and recorded outcomes. • Component inventory editing, stock reservations and consumption records. If Pro expires, your saved projects remain readable and exportable, and the first two remain editable. YOUR WORK, ON YOUR DEVICE No app account is required. Calculations and saved project records work locally. Export backups yourself; project cloud storage is not included. Optional usage analytics and error reporting are separately off by default. Purchases, restoration, subscription status updates and external reference links require an internet connection. CALCULATIONS AND SAFE USE Ohmetra provides calculations and estimates, not electrical measurements. Test readings are entered manually. Calculations and formulas may contain errors. Verify results independently and check assumptions, component documentation and ratings before building. Not intended for safety-critical use. Subscriptions renew automatically unless cancelled. Prices and billing periods are shown before purchase. Manage or cancel your subscription in your Apple account settings. Privacy Policy: https://lxappfactory.pt/privacy-policy.html Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/