The function of doctors in iGP Manager is to help train drivers more efficiently by reducing health lost for each tap of the training button.
5 star doctors are the most efficient, helping drivers minimize health lost by 10%.
For each star less a doctor has, a driver's health lost increases by 1% with each tap of the training button.
Here's a breakdown of health lost during training depending on how many stars a doctor has:
5 stars = 10% health lost
4 stars = 11% health lost
3 stars = 12% health lost
2 stars = 13% health lost
1 star (including empty stars) = 14% health lost
