Hello
I have read your requirements I will help you with the development of Phone finder application with the features as per your need. i have develop 500+ applications with this experience I feel fit for your project.
I have 5+ years of experience in both Website and app development(Android ,iOS )and I have developed the taxi booking app, E-commerce apps ,chatting and dating app, development etc.
Do you already have UI design screens?
Please share your project details to start working together,
Looking forward response,
Thanks.