I have created an app which I publish in the android market. After a few days, I added new features in my app and again publish these new features app in the android market. Now my question is how can notify a user that is using my older version app to update it to a new version. Is there something I have to write in the code or something I have to change in the android market.
Does anyone know how to solve this?
You have to do nothing, Android Market does this check for new versions and updating.
However, users may choose not to be notified about app updates.