To clear soundcloud app cache, follow these steps:
Open the app in your smartphone.
Go to the settings page by clicking the last icon from the bottom row as shown in below image.
On that page, at the top right corner, your profile picture is shown. Click on it.
Click on settings.
In next step, you will see the option of "Basic Settings". Click on it.
After that you will see an option to clear cache of the application. Click on it. It is not harmful to your app and will not remove any history. You are safe to do it.
