Yes, you can. You have to do this:
No, there is no need to write long bio's anymore. During the application process, you will be asked to write a (short) motivation why you think you are the best candidate for the job - that's all!
The app will wait for a while. The main reason: it costs a lot (a lot!) to develop really good apps. We think we can spend that money better in a good web application that works on almost every mobile device. Also because we are still launching new features. In the meantime, you can just pretend to have an app. This is what you can do:
For iOS and MacOS devices
For Android devices
For Windows devices