With the use of latest design frameworks like Bootstrap and zurb foundation, we are able to create a pixel perfect responsive, cross-browser web pages and UIs. There is rapid growth in the technology and there is no stop to introduction to newer devices with different resolutions and screen sizes. It's important that your web application is compatible with all these devices as the users are growing day by day. The solution is responsive web design.
Developing a mobile version or a device specific application for every device can be an ongoing task demanding high investment.