The concept of making an assumption about date of death is good, but the input info is not detailed enough for any believable accuracy. For instance: diet is not considered, diabetes, sleep disorders, certain medications, and many other life shortening diseases and conditions are not asked. Yes, I know most Americans have a very short attention span. Build a more scientific and transparent app for those of us with a brain. I would pay for an app that used more subjective criteria to arrive at a believable outcome.