Or take a look at the tutorials on the website which I will record my process to build an 8-bit computer. Enjoy building the circuit with your fingertip. I'm happy to hear how this app has been used in your case to continue to improve the app and add more features. About price: I will continue maintenance and update this app and may raise the price to support updates if a major new feature version is released. The paid users will get all updates and thanks for your support of this app at an earlier stage.