What is the typical ratio of downloads to sign ups for B2C product apps eg A typical fitness/health app?

I have a health app where the user sign up is quite straightforward(at least in my eyes). It goes as follows -

  1. Screen 1 - enter email id, password
  2. Screen 2 - enter verification code sent on email
  3. Screen 3 - enter Name, gender

Currently the average ratio of downloads to sign ups has been around 65% only. So around 35% of the people who download don't go through sign up process at all. Is this normal for a typical b2c app like ours? What can I do to improve this?