frida-kill
This is a command-line tool for killing processes.
You can acquire PIDs from frida-ps tool.
$ frida-kill -D <DEVICE-ID> <PID>
# List active applications
$ frida-ps -D 1d07b5f6a7a72552aca8ab0e6b706f3f3958f63e -a
PID Name Identifier
---- ------------------ -----------------------------------------------------
4433 Camera com.apple.camera
4001 Cydia com.saurik.Cydia
4997 Filza com.tigisoftware.Filza
4130 IPA Installer com.slugrail.ipainstaller
3992 Mail com.apple.mobilemail
4888 Maps com.apple.Maps
6494 Messages com.apple.MobileSMS
5029 Safari com.apple.mobilesafari
4121 Settings com.apple.Preferences
# Connect Frida to the device and kill running process
$ frida-kill -D 1d07b5f6a7a72552aca8ab0e6b706f3f3958f63e 5029
# Check if process has been killed
$ frida-ps -D 1d07b5f6a7a72552aca8ab0e6b706f3f3958f63e -a
PID Name Identifier
---- ------------------ -----------------------------------------------------
4433 Camera com.apple.camera
4001 Cydia com.saurik.Cydia
4997 Filza com.tigisoftware.Filza
4130 IPA Installer com.slugrail.ipainstaller
3992 Mail com.apple.mobilemail
4888 Maps com.apple.Maps
6494 Messages com.apple.MobileSMS
4121 Settings com.apple.Preferences