Here are three apps that have the minimal design concept nailed down. I use these apps often and like how the controls kind of get out of the way and you get to interact with the app directly.
Google Maps
I loved the Google Maps app the moment I downloaded it. The app uses a minimal number of colours. Different shades of grey is used to make elements stand out or blend in to the background as needed.
The concept of navigation and tab bars are totally missing in the app. Making it look unique.
Flipboard is the best use case when talking about minimalism. The content is front and centre. The only distractions on the screen is the white navigation bar that takes you back to the main screen.
I like this app because the design is so dependent on the content but still manages to present itself gorgeously each time. This is hard to manage especially when you are dealing with feeds from bloggers who sometimes are design-challenged 
Rise
It is hard to get a good screenshot that describes Rise because every screen shows the minimum amount of information possible.
But that is the beauty of it. You are only shown the most important information at any point in time. An alarm clock is simple, show me the time and how long I have to sleep. That is all.
Well done.
The First Really Minimal Vault Template
This month, I have been so inspired by the minimal design concept that I decided to release a design template that embodies minimalism on the Vault. Hopefully this will help you make your own stunning looking apps, apps that will rock your next update and get good reviews from your users.
Take a look at Metropolitan here
We decided to take a shopping app as a basic concept. The design is dependent on the content (products, bags, shoes) just like the Flipboard app but then we use a small number of colours (blue and shades of grey) to make things stand out.
This is live now and you can buy it at a discount now. Go here to find out more and get your copy of Metropolitan
