tinted windows does not gurantee that the infra red rays of the sun will be filtered out. go for window films that cut out infra red and uv rays.
In my experience, no matter what top grade window film, they are pretty useless when u parked out in the open for more than half an hour.
buy a fine water mist spray to cool ur car interior instantly before u get in, but make sure the bottle is insulated so the water is not hot.