Unconsciously, you may find your iPhone begins to act wonky that it should take 20 swipes to navigate from one screen to the last. To a large extent, it is caused by redundant apps on your iPhone. Then this is why it's essential for you to remove apps from iPhone (includes new iPhone SE).
Fortunately, removing iPhone apps is so simple that there're 4 ways on how to delete iPhone apps for you to choose from. Read on and pick any one that you're comfortable with.
Note that this would delete both the App and all of its data. Therefore, if you'll need the app again, think twice before tapping "X" or turn to Uninstall apps on iPhone via iCareFone (iPhone Care Pro), which allows to back the data up before uninstalling it.
To make up for the deficiencies in above 2 ways, you must get the iPhone system care utility downloaded, which empowers you to view detailed information of iPhone apps at one time and back them up before uninstalling.
In fact, none of the 3 ways mentioned above permanently remove apps if you backed up iPhone with iTunes before, because they would return next time when you download an app from iTunes store or sync existing apps to iTunes library. Therefore, to remove them entirely, you must do as follows.
After uninstalling several apps, you would definitely improve the performance of your iPhone SE/6S/6 Plus/6/5S/5C/5. And FYI, you can also speed up iPhone by deleting unnecessary data, temporary files as well as histories and cookies on Safari.