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New look, same offline toolkit: • Bolder design with Liquid Glass navigation • Refreshed Home, Search and Settings • Improved accessibility and contrast • Performance improvements and fixes
40+ electronics calculators, 39 pin‑outs & references — all offline ⭐
Voltary is a fast, offline electronics toolkit for engineers, students, makers, and hobbyists. Open the app and get answers instantly — no internet, no account, no sign-up required. Whether you're designing a circuit, debugging hardware on the bench, wiring a connector, or studying for an exam, Voltary brings the calculators, pin-outs, and references you reach for every day into one clean, fast app. ⚡ 40+ CALCULATORS & CONVERTERS Solve it in seconds with live, formula-backed tools: • Ohm's Law, power & power factor • Voltage divider and LED series resistor • Resistor colour code (3/4/5/6-band) + SMD codes • Capacitor charge/discharge, RC/RL/LC filters • Reactance, impedance & resonance • 555 timer (astable / monostable) • Op-amp and voltage regulators (linear & adjustable) • Inductor design, Y-Δ transform, RTD/PT100, decibels, number bases, and more Every calculator shows the formula and updates as you type. 🔌 39 CONNECTOR PIN-OUTS Real, accurate connector diagrams you can tap to zoom and pan, with pin names, numbers and functions: USB-A/B/C, HDMI, DisplayPort, VGA, DVI, DB9, RJ-45 / PoE, Raspberry Pi GPIO (40-pin), Arduino, SATA, microSD / SIM, XLR, MIDI / DIN, TRS, RCA, OBD-II, JTAG, GPIB / IEEE-488, PCI / PCIe, BeagleBone, and many more. 📚 REFERENCE LIBRARY The tables you always end up searching for — bundled offline: • Resistor & capacitor standard values (E-series) • AWG wire gauge & current ratings • Logic level thresholds (TTL / CMOS) • Decibel (dB) reference, IP code, ASCII • SMD package sizes, fuse types, battery chemistries, and more ✏️ SCHEMATIC SKETCHPAD Sketch quick circuit ideas right on your phone — drop components, wires and notes for a fast hand-drawn schematic. WHY VOLTARY • Works 100% offline — no connection needed • No account or sign-up • Fast, lightweight, clean dark interface • Available in 14 languages • Built for real bench work, classrooms and field repairs From your first breadboard to professional EE work, Voltary keeps the whole electronics bench in your pocket — online or off.