Buy/rent calculators are definitely a great tool for homebuying assistance but we need more things like how what area to choose based on preferences (suggest me possible areas based on my preference?), should i really buy even if financially feasible (single vs. married couples etc), what is my possible job outlook or status in next 3-5 years, do i expect to move soon? if an app can take in all these factors along with financials, it could suggest something close enough.