Circuit Simulator - VoltSim

Circuit Simulator - VoltSim

Realtime electronics lab

93 ratings
13 reviews
Free
In-App Purchases

Details

Released
April 4, 2025
Updated
October 30, 2026

Features

Circuit Simulator - VoltSim screenshot #1 for iPhone
Circuit Simulator - VoltSim screenshot #2 for iPhone
Circuit Simulator - VoltSim screenshot #3 for iPhone
Circuit Simulator - VoltSim screenshot #4 for iPhone
Circuit Simulator - VoltSim screenshot #5 for iPhone
iphone
ipad
🖼️Get Icon
Icons↘︎

About

Design and simulate electronic and digital circuits in real-time. Visualize voltage and current flow, and analyze signals with oscilloscopes and multimeters. Offers a user-friendly experience for circuit design and digital electronic analysis.

✓Real-time circuit simulation
✓Voltage and current analysis
✓Multichannel oscilloscope
✓Digital circuit simulation
✓User-friendly interface
✓Circuit design tools
Show original description
+1

What's New in Circuit Simulator

1.0.5

October 30, 2026

• Redesigned component toolbar, no more scrolling • Script Chip: 1–16 inputs/outputs and editable parameters • New ICs: 74189 64-bit RAM, 4008 4-bit adder, 4077 XNOR • Manage custom ICs in Settings; find them in component search • Community: search, circuit details and language filter • Signal sources up to 50 MHz • Steadier RMS meter readings • Wire-loop and chip-packaging errors highlight the cause • Fixes for 74xx/40xx chips, wire routing, thermistor, wattmeter, sign-up and stability

More
7

Subscriptions & In-App Purchases

Extensions Subscription

Will enable all offline extensions for month

$0.991 Month
How to cancel Circuit Simulator subscription ⁉️

User reviews

A Great Learning Tool for Electrical Students

I’m currently a student studying industrial maintenance, and VoltSim has been a great addition to my DC Theory class. Instead of only working problems on paper, I can actually build the circuits I’m learning about and see how voltage, current, resistance, and other electrical concepts behave.

What I like most is being able to calculate a circuit myself and then use VoltSim to test my answer. It gives me a more hands-on way to understand concepts like Ohm’s Law, series and parallel circuits, meters, switches, relays, motors, and other components.

I purchased the Core Bundle because I can see myself continuing to use VoltSim beyond DC Theory. As I move further into industrial maintenance, motor controls, PLCs, and troubleshooting, having a simulator where I can experiment without worrying about damaging real equipment is a huge advantage.

For a student who learns better by actually seeing and doing things, VoltSim makes the material feel much more practical. I’m looking forward to seeing how far I can take it as I continue my training.
Show more

Bugs and Advices

I just paid monthly in another account with another currency.
I rated two stars so maybe developers can notice.

1. Sometimes can’t edit pins in existing chips. (Can’t save.)
2. Sometimes the caret doesn’t move when editing project names.
3. Sometimes cannot add new components in a project. (Too many?)
4. I want to remove(hide) pin numbers. (I already have labels!)
5. Custom chips should be drawn one size smaller.
6. I want a “Move” mode to move components without clicking it first.
7. I want to double click in most editing modes to activate drag selection.
8. I want to copy a part of a project to another project. (Instead of copying the whole project and deleting everything else.)
9. When using the “Interact” mode, the “Push” switch should act like a “Push” switch instead of a “Switch” switch.
10. When duplicating a group of components, the new copy should appear in totally empty places. (Otherwise it will sometimes accidentally connect with other things.)
11. Sometimes “Undo” disables itself and it’s scary. I need more stable “Undo” and “Redo”.
12. I need “Rotate”, “Flip”, and “Rotate 180” for groups.
13. “Delete” button should be further away from everything else or ask before deleting.
14. When duplicating some single objects, I want the new copy to be at right below so I can use them together immediately.
15. When adding new components, they should appear near the center of the screen. (The biggest problem for new users to continue using.)
16. I want to use(copy) a group(like bulbs) in another project without it being a chip.
Show more

It’s very very good

Easy to work and good for beginners

Great tool for learning

This app is great for learning about circuits and the behavior of different electrical components. Definitely recommend!

Wow.

This is honestly one of the best apps out there, better than other apps requiring either enormous amounts of ads or a 20 dollar subscription, but you guys only do a dollar a month, really cheap, i will think about getting it some time soon I suppose.

FAQ

What is VoltSim?

VoltSim is a real-time electronic circuit simulator that allows users to design, simulate, and analyze electric and digital circuits. It provides tools to visualize voltage and current flow, and analyze signals using oscilloscopes and multimeters.

What components can I use in VoltSim?

VoltSim supports a variety of components for circuit design, enabling users to create complex electronic and digital circuits. Specific component lists are available within the app's design interface.

Can VoltSim simulate digital circuits?

Yes, VoltSim can be used as a logic circuit simulator, allowing for digital electronic analysis. You can perform digital circuit simulations and analyze their behavior.

How does VoltSim compare to Multisim or LTspice?

VoltSim aims to provide a better user experience for circuit design and simulation, comparable to professional tools like Multisim, SPICE, and LTspice, but optimized for mobile devices.

Is VoltSim suitable for learning electronics?

Yes, VoltSim is an excellent tool for learning electronics. It helps visualize how voltage and current behave in circuits, making complex concepts easier to understand for students and hobbyists.

What devices is VoltSim available on?

VoltSim is available on iPhone, iPad, and iPod devices. It is designed to offer a seamless experience across Apple's mobile platforms.

Does VoltSim have ads?

No, VoltSim does not contain advertisements. The app is free to download and use, with optional in-app purchases for extensions.

What is the price of the Extensions Subscription?

The Extensions Subscription for VoltSim is priced at $0.99 per month. This subscription provides access to additional features and extensions for the simulator.