I found there are a few type of people willing to buy apps in google play in my circle of friends.
First of all, they are local australian , not Hong Kong people. They are happy to spend some money in good app. Most of Hong Kong people are still thinking android apps have to be free. Well ,there is no free lunch in the world.
Second type is ex iphone user. They get used to buy apps in appstore. Paid app is nothing strange to them.
Third one is business users. If they will buy any app which can increase their productive or earn money, they are very willing to buy those apps.
If you want to build some paid, you can target those kind of people
Recently, Whatsapp need to charge some of their android clients. As an Android developer, that is not a bad things. Most of android client ever bought anythings from Google Play. I believe there will be a number of users need to enter their payment details. After that, if they want to buy other paid app, they just need to click and their password again. That is easier. Moreover, after their first times to buy a paid app, they may think that is not too bad to spend one or two dollars for buying an app. That is good for us.
I used a lot of opensource grid control, such as PagedList.Mvc. They are great! But I found they are not working with Ajax very easily! But I found MVC3 has a default Grid control calls, WebGrid. It work perfectly with Ajax. You just need to say the gird name in "ajaxUpdateContainerId".
In the area you need to display the gird
That is easy!!!
If you are using MVC3, you can save your time to look for third party control.
If you are in the field of photo editing, then you should know what is HDR Effect. In a simple term, this is a photo editing effect to make the photo more artistic! Sometimes, I use the copies of same photo to build a HDR photo in GIMP. Nowadays, there is a quicker way. There are some app make to do this job, such as an app calls HDRCamera in Android Market. You just need to open this app and then press a button to take photos. Just like your default android camera. Then it will do the job for you.
That is a quite good!