* Remove apps that you no longer use to free up space on your Apple iPhone 6s.
* Go to the Start screen.
* Choose *Settings*.
* Scroll down.
* Choose *General*.
* Choose *iPhone Storage*.
* Choose an application, in this case, *WhatsApp*.
* The application has been removed.
* Return to the Start screen.
* Keep all your apps up-to-date. Learn how to check for app updates.