Circuit simulator for AndroidVoltz

Voltz is a touch-first electronic circuit simulator for Android. You design circuits on a grid, run a real-time simulation with animated current and voltage colouring, measure any part, and learn with example circuits and short lessons.

Yes. Voltz is free to download and use with all basic parts, up to 5 saved circuits, 2 oscilloscope channels and the free lessons. There are no ads. Free users see a Voltz Pro offer when the app opens, and you can close it and keep using the free version.

Voltz Pro costs $3.99 per month or $19.99 per year, and the yearly plan starts with a 7-day free trial. Pro unlocks the advanced parts (function generator, current source, potentiometer, fuse, SPDT switch, Zener diode, MOSFETs, 555 timer, NAND, NOR and XOR gates, clock and D flip-flop), unlimited saved circuits, 4 oscilloscope channels, all lessons and asking the AI about your circuit. Google Play shows the price in your local currency before you subscribe.

Subscriptions are billed and managed by Google Play. You can cancel at any time in the Play Store under Payments and subscriptions. If you cancel during the free trial before it ends, you are not charged.

Voltz has more than 35 parts: DC and AC sources, battery, function generator, current source, resistor, potentiometer, capacitor, inductor, lamp, fuse, SPST and SPDT switches, push button, diode, LED, Zener diode, NPN and PNP transistors, N and P channel MOSFETs, op-amp, 555 timer, logic input and output, clock, AND, OR, NOT, NAND, NOR and XOR gates, D flip-flop, voltmeter and ammeter.

Yes. Building and simulating circuits runs entirely on your device, so no connection is needed. Only the Community and asking the AI about your circuit need internet.

Yes, with Voltz Pro (free users can try it a few times). In the editor, choose Ask about this circuit and the AI explains the circuit you built, such as why an LED is not lighting or what a resistor is doing. It only answers questions about your open circuit; there is no general chat. To answer, your question and a text description of the open circuit are sent to our server and an AI provider. AI answers can contain mistakes, so treat them as a study aid.

Voltz runs a transient simulation that models how voltages and currents change over time, which makes it well suited to learning and trying out ideas. Like every simulator it uses simplified models of real parts, so check component ratings and datasheets before you build a circuit for real.

Circuits are saved on your device. You can share any circuit as a .volt file, import .volt files from others, and export a PNG image of your design.

No. Voltz creates an anonymous account for you automatically, so there is nothing to sign up for. Your circuits stay on your device.

Not yet. Voltz is available on Android today, and an iOS version is planned.

The Community is a gallery of circuits shared by Voltz users. You can share a circuit from the editor menu under an anonymous name, like circuits from others and open any of them in your editor. You can report a circuit or block its author at any time, and circuits reported by several people are hidden until we review them.