Hello! I am a professional software developer with 20 years of experience in general software development and three years specifically with Android development.
I have developed apps with very similar functionality to your requirements and I am quite confident that I can deliver this app to your satisfaction. I do have some questions for you about your requirements - specifically, what the app should do if the device does not have a data connection when it collects location data.
You do need to know a few things about my situation so that we avoid unrealistic expectations. I am only available part-time, about 10-15 hours per week; I have another full-time job, and I work on freelancer.com projects in my evenings and weekends (I am in the US Eastern time zone, GMT-0400). I am not available to work every night because of other family and work commitments, but I am able to work for some time on most nights.
Although I am not able to work a full-time schedule on this project, I am committed to producing a quality product. I always stand behind my work and communicate as much as I can - the more we both know about what is being done, the better off we are.
This bid represents 20 hours of work at $25/hour, plus the freelancer.com fees. Can we communicate a little more via private message so that I can be sure to understand what you need? If needed, I can then revise this bid to be more accurate.
Thank you for your interest, and I look forward to hearing from you soon.