PROTO - circuit simulator
Education In-app purchases
Build and simulate electronic circuits with PROTO application!
- Rating
- 4.5
- 13.8K ratings
- Downloads
- 1M+
- on Google Play
- Price
- Free
- In-app purchases
- Updated
- Sep 11
- 2026 · v1.51.0
Screenshots
About PROTO - circuit simulator
PROTO is an real time electronic circuit simulator which means you are able to setup a circuit with various components and simulate behaviour of the electronic circuit.
During simulation you can check voltages, currents and many other variables. Check signals on multichannel oscilioscope and tune your circuit in real time!
* PLEASE KEEP IN MIND THAT THIS APP IS IN ALPHA STAGE :) *
* You can report an issue or make component request at https://github.com/Proto-App/Proto-Android/issues *
Features:
+ Animations of voltage values and current flows
+ Adjusts circuit parameters
+ Oscilloscope
+ Single play/pause button to control simulation
Components:
+ DC, AC, Square, Trinagle, Sawtooth, Pulse, Noise voltage source
+ Current source
+ Resistors
+ Potentiometer
+ Capacitors
+ Inductors
+ Transformers
+ Diodes (rectifying diode, LED, Zener, Schottky)
+ Transistors (NPN, PNP, N and P channel Mosfet)
+ Switches (SPST, Relay)
+ Bulb
+ Operational amplifier
+ Timer 555 (NE555)
+ Digital (AND, NAND, OR, XOR, NOR, Inverter)
+ Voltmeter
+ Ammeter
+ Fuse
+ Photoresistor (uses phone light sensor)
+ Analog-to-digital converter (ADC)
+ Accelerometer (uses phone accelerometer sensor)
+ FM source
+ Logic Input
During simulation you can check voltages, currents and many other variables. Check signals on multichannel oscilioscope and tune your circuit in real time!
* PLEASE KEEP IN MIND THAT THIS APP IS IN ALPHA STAGE :) *
* You can report an issue or make component request at https://github.com/Proto-App/Proto-Android/issues *
Features:
+ Animations of voltage values and current flows
+ Adjusts circuit parameters
+ Oscilloscope
+ Single play/pause button to control simulation
Components:
+ DC, AC, Square, Trinagle, Sawtooth, Pulse, Noise voltage source
+ Current source
+ Resistors
+ Potentiometer
+ Capacitors
+ Inductors
+ Transformers
+ Diodes (rectifying diode, LED, Zener, Schottky)
+ Transistors (NPN, PNP, N and P channel Mosfet)
+ Switches (SPST, Relay)
+ Bulb
+ Operational amplifier
+ Timer 555 (NE555)
+ Digital (AND, NAND, OR, XOR, NOR, Inverter)
+ Voltmeter
+ Ammeter
+ Fuse
+ Photoresistor (uses phone light sensor)
+ Analog-to-digital converter (ADC)
+ Accelerometer (uses phone accelerometer sensor)
+ FM source
+ Logic Input
What’s new
Version 1.51.0 · Updated September 11, 2026
• New CMOS logic ICs: 4008 adder, 4024 counter, 4027 flip-flop, 4077 XNOR • New in-app datasheets for TTL and CMOS logic ICs • New Screen margin setting for devices with rounded corners • Bug fixes and stability improvements
Frequently asked questions
What is PROTO?
PROTO is a real-time electronic circuit simulator that allows users to set up and simulate the behavior of electronic circuits.
What can I do during simulation in PROTO?
During simulation in PROTO, you can check voltages, currents, and many other variables. You can also check signals on a multichannel oscilloscope and tune your circuit in real time.
Is PROTO still in development?
Yes, PROTO is currently in its alpha stage of development.
How can I report an issue or make a component request for PROTO?
You can report an issue or make a component request for PROTO at https://github.com/Proto-App/Proto-Android/issues.
What are the features of PROTO?
The features of PROTO include animations of voltage values and current flows, the ability to adjust circuit parameters, an oscilloscope, and a single play/pause button to control the simulation.
What components are available in PROTO?
PROTO offers a wide range of components, including voltage sources such as DC, AC, Square, Triangle, Sawtooth, Pulse, and Noise sources. It also includes current sources, resistors, potentiometers, capacitors, inductors, transformers, diodes (rectifying diode, LED, Zener, Schottky), transistors (NPN, PNP, N and P channel Mosfet), switches (SPST, Relay), bulb, operational amplifier, timer 555 (NE555), digital components (AND, NAND, OR, XOR, NOR, Inverter), voltmeter, ammeter, fuse, photoresistor (uses phone light sensor), analog-to-digital converter (ADC), accelerometer (uses phone accelerometer sensor), FM source, and logic input.
Alternatives to PROTO - circuit simulator
Looking for apps like PROTO - circuit simulator? Here are 6 similar Android apps on Google Play. The highest rated is VoltLab (4.9/5), and all 6 are free to download.
-
VoltLab 4.9
-
ElectroBox - Electronics 4.8
-
Electronics Lab 4.6
-
EveryCircuit 4.0
-
Circuit Jam 4.3
-
All-In-One Calculator 4.7
| App | Rating | Price | Installs | Last updated | Compare |
|---|---|---|---|---|---|
| PROTO - circuit simulator | 4.5 / 5 | Free | 1,000,000+ | Sep 11, 2026 | |
| VoltLab | 4.9 / 5 | Free | 100,000+ | Sep 19, 2026 | Compare |
| ElectroBox - Electronics | 4.8 / 5 | Free | 100,000+ | Feb 21, 2026 | Compare |
| Electronics Lab | 4.6 / 5 | Free | 10,000+ | Feb 18, 2021 | Compare |
| EveryCircuit | 4.0 / 5 | Free | 5,000,000+ | Jan 25, 2025 | Compare |
| Circuit Jam | 4.3 / 5 | Free | 1,000,000+ | Sep 9, 2023 | Compare |
| All-In-One Calculator | 4.7 / 5 | Free | 10,000,000+ | Aug 11, 2026 | Compare |
Similar apps on Google Play
- VoltLab
- ElectroBox - Electronics
- Electronics Lab
- EveryCircuit
- Circuit Jam
- All-In-One Calculator
- BEAKER - Mix Chemicals
- Formulia
- Chemistry
- Desmos Graphing Calculator
- Trigonometry. Unit circle.
- CalcKit: All-In-One Calculator
- Periodic Table 2022: Chemistry
- Learn Coding/Programming: Mimo
- Onshape 3D CAD
- KingDraw: Chemistry Station
- Learn C++
- GeoGebra Graphing Calculator
- Flightradar24 Flight Tracker
- ReactionFlash