I have been designing and architecting business and consumer applications for over 20 years for the Fortune 500 as well as mid-sized companies and startups. I started with mobile development with the first releases of iOS and Android in 2008.
A great app will not only look good, it must also be easy to use, useful, fast and stable. These factors culminate in a wonderful user experience that keeps them coming back for more.
The best mobile strategies enable the company to stay ahead of the curve by incorporating the correct infrastructure, API's, security, development techniques, technologies and practices. Constant innovation (that is practical and cost effective) is critical to an app's successful adoption and longevity. If you're only using the latest technologies, you're already falling behind.