Questions I have

1. Is walking healthy
2. What is the maximum number of steps that we can walk in a day
3. Ratio of number of steps and distance covered
4. Syncing the data between one-plus band and other health apps which can be accessed from web
5. Are there any apps where I can track the movement within the house
   1. Google location tracking?
6. Keeping yourself hydrated
7. Can walking more affect your knees
8. Is just walking sufficient or should we mix it up with some other exercises too