Hello sir. I can add the timer functionality and make it synced/shared in between multiple components by maintaining all react native standards and best practices. The code quality and the performance will be top notch.
As I am not aware of the project properly, I kept a random budget and time. This will be revised accordingly
I am having 4+ years of experience in development with javascript and libraries such as react, angular, jquery etc.
I have started my freelacing journey in the freelancer platform 2 months ago and in the small span I have earned 12 "5 stars" (all) and great reviews.
Looking forward to work with you :)