It seems like you're experiencing difficulties setting up and using the Railmaster Pro app on your iPhone. Here are a few suggestions to help you troubleshoot the issue: Ensure that your iPhone and computer are connected to the same Wi-Fi network. This is crucial for the app to establish a connection with your Railmaster Pro setup. Double-check the IP address mentioned in the app. The IP address should correspond to the computer running Railmaster Pro, not your router. To find the IP address of your Windows computer, you can open the Command Prompt and type "ipconfig" to display the network configuration details. Verify that you have the latest version of the Railmaster Pro app installed on your iPhone. Check the App Store for any available updates and install them if necessary. In the meantime, if you have any unrelated questions or need assistance with other iPhone-related issues, feel free to ask. For example, if you need help with deleting iPhone contacts, you can go to this article https://howly.com/article/tt-how-to-delete-one-several-or-all-iphone-contacts