Digital Gate Circuit Simulator

It got frozen when I tried to save the current file. I cannot use apple pencil to draw the wire to connect gates so had to use fingers and due to the terminals are small so it hard to see if the wire get connected or not when the finger covers the terminal.

For some reason Whenever I want to wire a gate it only picks the output, even when I try to choose one of the inputs. It would be helpful if Apple Pencil can be used for wiring.

it does what it needs to in a great way. To build an advanced circuit, an ipad helps with the additional scene space and an apple pencil helps with the tiny buttons it's really good for what it is question for the developer: there is a "share" option. i finished a cool circuit and i wanted to see how to export it, and the app crashes vey time i click the "share" button... what are the designed export options? thanks love the app

This app is fantastic! I use it to demonstrate and “play” with digital logic. Much better than getting out the breadboard an my old TTL chips. Well thought out and friendly interface.

UPDATE 2: The latest update fixes the remaining issues I had with the app 😄. I would definitely recommend this app to anyone needing a logic simulator on their phone, and the developer is very responsive to fixing any problems you find in the app, and adding any useful suggestions 😀. One minor UI tweak that would be nice is if the zoom in/out would be centered between your fingers, like it is on most other iOS apps, rather than being centered on the top left corner as it is now. Alternatively being centered on the center of the screen when zooming would be slightly less ideal, but still better than it is now, and likely easier to implement. It also would help when making complex circuits if when you’re interacting with a particular component, the lines coming out of it were highlighted in a different color, and similarly, when running the circuit, if the lines were highlighted showing if they were on/off, rather than just the dot at either end showing that like it is now. It would also be useful to be able to change the colors of wires after creating them, and easily change the color of all wires going to a particular connection at once. It also could make it easier to deal with circuits if when dragging a wire to an off-screen part it would automatically scroll when pulling it to the edge of the screen, or let you scroll manually with another finger. UPDATED REVIEW: The new update fixes most of the problems I originally noted, making this app much more friendly to use 😃. It’s great that the developer listens to and acts on user feedback. However, on the iPhone X many of the top bar’s buttons are mostly blocked by the phone’s “notch”, resulting in users needing to tap randomly in that area and memorize the position of the different functions. Once this bug is fixed I will definitely use this app often. Overall this is a great update, with just this one pain point for some devices. Another nice-to-have but not essential feature would be the ability to open multiple circuits at once and connect them together/combine them, which would allow modular design that could be connected when complete. A good example of its use is with the multiplexer and demultiplexer example circuits, which could be combined together to better demonstrate their function. ORIGINAL REVIEW: This app works, but is not very user friendly. It would be much more useable if you could zoom in an out, as another review mentioned, you can barely fit any useful logic in a single screen bef