What is the first recommended step to take for a third-party app that is not responding immediately after it starts?

When addressing a third-party app that is not responding immediately after it starts, the recommended first step is to restart the app. This action effectively refreshes the app's current session and can resolve temporary glitches that may have caused the app to freeze or hang during its launch. Restarting the app clears its memory and all current processes, often allowing it to function normally upon relaunch.

This step is crucial because many minor issues with apps can be resolved simply by closing and reopening them. If the issue persists, then further steps like updating the app or reinstalling it may become necessary. However, restarting the app is the quickest way to address many common issues. Restarting the device might also resolve certain underlying issues, but it is generally more time-consuming and is best reserved for cases where app-specific troubleshooting does not succeed.