Ensure the file name indicates and premium or mod . File size should be around 15–25 MB. Do not download any “APK installer” or “helper” apps—only the standalone APK.

While the free version is a great starting point, many advanced users look to to unlock powerful features like advanced timing relays and unrestricted circuit components. Here is everything you need to know about what this app offers and why the premium features are so sought after. What is Simurelay?

a Forward-Reverse Motor Tutorial to see the app in action.

The app only needs basic storage access to save your circuit diagrams; be wary if a 2.4 mod asks for contacts or location.