URGENT PROJECT - Flutter edit

Hello,

I have a complete application in Flutter and i need some edits.

1) Add a subtitle in article page
2) Insert Quantcast for CMP (https://help.quantcast.com/hc/en-us/articles/1500000435481-Quantcast-Choice-Mobile-iOS-Implementation-Guide
https://help.quantcast.com/hc/en-us/articles/1500000450042-Quantcast-Choice-Mobile-Android-Implementation-Guide)
3) Change image in splash page
4) insert tracking link from Freeapp analytics