This might just be realistic about the median American's tolerance for walking. Most Americans live in suburbs that are not walkable. At least, I know my own tolerance for walking is very abnormal for an American, and it's due to having lived in walking-oriented cities like Berkeley.
Transit App allows you configure both your walking and cycling speeds. Works great (will show you 15-20min walking), generates lots of options on how-to-get-there (e.g. bike-on-bus, Uber to train station), gives more accurate ETAs. Also instead of reducing "public transit" to a binary, it gives you much more granularity in enabling/disabling which bus/tram/light-rail/mass transit/train options, and even which specific bus route numbers to prefer.
> This might just be realistic about the median American's tolerance for walking.
This might be unrealistic about the number and relevance of Median-Americans. Turns out more than a few Americans that are outside of the median own telephones.