This is Santosh Chaturvedi from India. I am a full stack web developer having 5 years+ experience in this field.
I checked your requirement for " UPDATING YOUR EXISTING APPLICATION " carefully and found Thêm
I will Update your current application which uses geo location to keep track on the users.
Please share application link with me and let me know what updation you need in it?
Below is my mobile app work.
Hope you will be fine.
I am an expert iOS dev with 3 years of experience and I can design and built your application. I know the versioning tool GIT.
I have done the live tracking thing in iOS app name Carpoolyn.