I think this will be better as a Web App than mobile App given that people don’t expect to be moving that often. Why download an App that will be used only for maybe a month?

Making it a web App also increases the chance that people will use it. E.g. I might not be thinking of moving now but based on your show HN, I could try it and if I like it, will bookmark for future use. Being a mobile App, people will probably not install it just to try it out if they don’t have an immediate use for it.