Don't be an app hoarder! Look through your apps and ask yourself "do I use it?", "do I need it?".
Every app is a potential security risk just waiting to bite you. The bad guys are always looking for vulnerable apps and new flaws in apps are discovered every day. DON'T BE A VICTIM!
Here are some useful links for uninstalling apps:
Windows 10
https://support.microsoft.com/en-us/help/4028003/windows-10-uninstall-apps-and-programs
Windows 7
https://support.microsoft.com/en-us/help/2601726
MacOS
https://support.apple.com/kb/PH25083?viewlocale=en_LB&locale=en_LB
iOS
https://support.apple.com/en-us/HT207618
Android
https://support.google.com/googleplay/answer/2521768?hl=en