build ipa file and install to iphone

[You Sour]

hi, i try build ipa and install to iphone , anyone idea ? i need the right way to do it 
here what i did : 
first : i run command flutter build ios --release
then i copy file "Myapp.app" to a new folder and zip it 

after that i change extension from "app" to ''ipa"
for install myapp to iphone i use itool  cydia impactor but it fail ,
i need help , thank you in advance