Do this by swiping up from the bottom edge of the screen and releasing quickly. If you're using a non-full screen model, hold your finger against the home button, which will bring you to the main menu of your phone.
Find the app on your phone that you want to delete.
I have everything organized on my phone under menus which helps me maintain peace of mind when I'm actually on my phone.
Once you have your app in sight, hold your finger against the screen for exactly one second. This will activate the 3D touch menu which gives quick access for app options.
Different apps have different menus depending on the app type, but they'll all have the same basic layout.
The option to Delete App will be at the bottom of every menu, regardless of app type. It will also be written in red.
Select this option by pressing it, which will prompt a pop-up screen that gives you the option to either delete the app or cancel.
What's next? You guessed it! Select delete by tapping the Delete button which removes the app from your phone's immediate memory.
This action will not affect deleting data in your iCloud, which means any data that you've allowed your iCloud to backup will be preserved there.
And voila! You can enjoy your phone with one less app cluttering your memory or home screen space.