With this service, I will create an android mobile application that contains all the features you need ranging from location tracking to notifications. I have wide experience in android development having started from 2018. My first published app is still in the Play Store and was made using Ionic. Here is the link if you'd like to check it out: https://play.google.com/store/apps/details?id=com.missolova.spiq&hl=en_US&gl=US.
I can also develop cross-platform apps using Flutter if required.