Why is the app asking me to choose a subscription?

The app is normally available on a subscription basis, which you can choose to pay either monthly or annually. If you joined Warmshowers more than a month ago, your free trial period for the app has now ended, and to use the app as a cyclist you need to choose a subscription. You can still access Warmshowers for free via the website, or use the app for free in Host Only mode to manage incoming hosting requests. All revenue from the app goes to fund support and further development of both the app and the website.