Open Settings
Tap Storage
Tap Apps or Other Apps
Select the app
Tap Clear Cache
Repeat for other apps if needed
To clear browser cache, open the browser app
Tap Menu
Tap History or Privacy
Tap Clear browsing data
Select Cached images and files
Tap Clear data
To clear system cache on some phones, turn off the phone
Boot into Recovery Mode
Select Wipe cache partition
Confirm the action
Restart the phone