What are the best ways to give design feedback to mobile app developers?

I'm product designer working remotely with a team of iOS & android app developers on a redesign project of their mobile app. The final designs are done on Adobe XD. The redesigned app looks great however the finer details require some more work and needs to be perfected. I have tried visual feedback tool like trackduck for mobile websites. How do I give my comments visually on the finer details of design to the app development team.

Kindly recommend any tools or process.