PROTO - circuit simulator v1.45.0
PROTOAbout this app
Developer Description
Build, simulate and learn about electronic circuits with PROTO circuit simulator
During simulation you can check voltages, currents and many other variables. Check signals on multichannel oscilioscope and tune your circuit in real time! Our app can greatly help with your Raspberry Pi, Arduino or ESP32 project. You can also use PROTO as logic circuit simulator and perform digital electronic analysis!
ℹ️ You can report an issue or make component request at Github
👉 Features:
✅ Animations of voltage values and current flows
✅ Adjusts circuit parameters (like voltage, current and other)
✅ Four-channel oscilloscope
✅ Single play/pause button to control simulation
✅ Copy electronic components
✅ Learn about electronic circuits by examples in app
✅ Share circuit with friends
✅ Themes (Dark, Light, Ocean, Solarized)
✅ PNG, JPG, PDF circuit export
✅ Export workspace
✅ Video tutorials about electronics
🔥 Arduino support in future
👉 Components:
+ DC, AC, Square, Trinagle, Sawtooth, Pulse, Noise voltage source
+ Current source
+ Resistor
+ Potentiometer
+ Capacitor
+ Polarized capacitor
+ Inductor
+ Transformer
+ Diode (rectifying diode, LED, Zener, Schottky)
+ Transistor (NPN, PNP, N and P channel Mosfet)
+ Switches (SPST, Relay)
+ Bulb
+ Operational amplifier
+ Timer 555 (NE555)
+ Digital Gates (AND, NAND, OR, XOR, NOR, NXOR, Inverter)
+ Voltmeter
+ Ammeter
+ Fuse
+ Photoresistor (uses phone light sensor)
+ Analog-to-digital converter (ADC)
+ Accelerometer (uses phone accelerometer sensor)
+ FM source
+ Logic Input
+ Memristor
+ Logic output
+ Probe
+ Voltage rail
👉 Analog Pack:
+ Tunnel diode
+ Varactor
+ NTC Thermistor
+ Center tapped transformer
+ Schmitt trigger
+ Schmitt trigger (inverting)
+ Solar cell
+ TRIAC
+ DIAC
+ Thyristor
+ Triode
+ Darlington NPN
+ Darlington PNP
+ Analog SPST
+ Analog SPDT
Digital Pack:
+ Adder
+ Counter
+ Latch
+ PISO Register
+ SIPO Register
+ Seven segment decoder
+ Sequence generator
+ D Flip-flop
+ T Flip-flop
+ JK Flip-flop
+ Multiplexer
+ Demultiplexer
+ Voltage controlled current source (VCCS)
+ Voltage controlled voltage source (VCVS)
+ Current controlled current source (CCCS)
+ Current controlled voltage source (CCVS)
+ Optocoupler
👉 Misc Pack:
+ Wobbulator
+ AM Source
+ SPDT Switch
+ Digital to analog converter (DAC)
+ Antenna
+ Spark gap
+ LED Bar
+ 7 segment LED
+ RGB LED
+ Ohmmeter
+ Audio input
+ Microphone
+ Device battery
+ DC Motor
+ 14 segment LED
+ Diode bridge
+ Crystal
+ Voltage regulators (78xx family)
+ TL431
+ Buzzer
+ Frequency meter
👉 JavaScrip Pack:
+ Write code
+ JavaScript interpreter (ES2020 class)
+ Access to IC inputs in code
+ Access to IC outputs in code
+ Four custom ICs
👉 7400 TTL Pack:
+ 7404 - hex inverter
+ 7410 - triple 3-input NAND Gate
+ 7414 - hex Schmitt-trigger inverter
+ 7432 - quadruple 2-input OR gate
+ 7440 - dual 4-input NAND buffer
+ 7485 - 4-bit magnitude comparator
+ 7493 - binary counter
+ 744075 - triple 3-input OR gate
+ 741G32 - single 2-input OR gate
+ 741G86 - single 2-input XOR gate
👉 4000 CMOS Pack:
+ 4000 - dual 3-input NOR gate and inverter.
+ 4001 - quad 2-input NOR gate.
+ 4002 - dual 4-input NOR gate.
+ 4011 - quad 2-input NAND gate.
+ 4016 - quad bilateral switch.
+ 4017 - 5-stage Johnson decade counter.
+ 4023 - triple 3-input NAND gate.
+ 4025 - triple 3-input NOR gate.
+ 4081 - quad 2-input AND gate.
+ 4511 - BCD to 7-segment decoder.
👉 Sensors pack:
+ Pressure
+ Gyroscope
+ Light
+ Magnetic field
+ Proximity
+ Temperature
+ Humidity
What's New
> Fix top bar UI issue on Android 16 - https://github.com/Proto-App/Proto-Android/issues/437
In-app purchases
$2.99 - $19.00 per item
Version Information
- Version
- 1.45.0
- Downloads
- 1M+
- Updated on
- Dec 18, 2025
- Released
- Oct 25, 2021
- Requires
- Android 6.0
Statistics
Google Play Rating History
Rating Distribution
Downloads Over Time
PROTO - circuit simulator has been downloaded times. Over the past 30 days, it averaged downloads per day.
Shaded area shows 30-day prediction based on historical trends
Historical data collection started recently. More data points will be available over time.
PROTO - circuit simulator users say on Google Play
I use it almost every day. Works great. I paid for the full app and don't regret it. Word to the wise- dont obsess over circuits. There is more to life than electronics! lol Suggestions for the devs: I would like to see my saved circuits appear across all my devices and would love a feature that would let me capture or scan an image of a schematic and copy it into Proto. More parameters for discrete components would be useful as well. thanks to the devs. keep up the good work.
The user interface feels a little clunky to use. long holding something should allow you to drag it. It's great for learning electronics, but the lack of frequency control for AC supplies and lack of AC components other than inductors and non polarized capacitors really has me wanting more. When i train guys in the workplace i really rely on visual aids to show people what's happening inside wires when data or power is being sent somewhere. It just lacks important components to be of use.
Would give it a 5, but there is minimal support and a community page with shared circuits would be a great addition to the app for users who have bought some add-ons. And for some or other reason when I select to change a parameter of a component, it zooms quite deep into the circuit, which annoys me because when I zoom out again I move the selected component. It would be fine if it does not do the zooming at all
A bit more stable than EveryCircuit, but not by much. Uninstalling because after a circuit reported "unable to solve", no matter what I did I could never revert back to when it worked. A lot of time wasted. Also, the lack of wire autorouting and the precision with which you need to select wires and components is extremely frustrating. Also, why can't I connect a wire to another one, unless there is already a junction?!
Bro i need help so bad, please respond to me as soon as possible, i made a 4 bit cpu, when i tested, it worked fine, and then i saved and left and joined back again, when suddenly, i saw everything is just 0 OFF or brown. I couldn't do anything to save it, it was so hard to make it, please fix it, everything is brown even wires, not green,, 0 not 1, i used digital logic components
Similar Apps
Logic Circuit Simulator Pro
Free
phyphox
Free
GeoGebra Geometry
Free
Building Tools
Free
Tooly All Tools In One Toolbox
Free
Pydroid 3 - IDE for Python 3
Free
Periodic Table 2026: Chemistry
Free
AR Plan 3D Tape Measure, Ruler
Free
Mimo: Learn Coding/Programming
Free
Floor Plan Creator
Free
Ref Tools
Free
Learn Python
Free
AutoCAD - DWG Viewer & Editor
Free
TrebEdit - Mobile HTML Editor
Free
Programming Hub: Learn to code
Free
3D Modeling App: Sculpt & Draw
Free