Also, do you have any recommendations on whether I should have a end target to build mobile apps or web apps? I know the mobile app industry is growing,but I'm

Also, do you have any recommendations on whether I should have a end target to build mobile apps or web apps? I know the mobile app industry is growing,but I'm not sure which path to take. Is there a specific language targeted towards mobile app vs. web development? or is it the same background?