Making simple applications for devices

Smartphones have been in use for almost every other person. This makes your targeted audience larger. But that also emphasizes on the fact that your application needs to be simple and to the point. Only then will you be able to highlight your significance as a mobile app developers and help your application cater to all of your targeted users. This will influence them to come back to your application to receive solutions and functions that are not provided anywhere else. How effective do you personally think it is to create simple applications?