You need the Nettla mobile app (or your club's own app) to book courts, matches, activities, coaching, memberships, club wallets and leagues. The player website is only for a few things, such as paying from a link.
What you can do on the website
Pay for something marked Unpaid from the Pay button in an email.
Pay from a checkout link, for example one sent by your club's WhatsApp assistant.
Pay your share of a league entry from the email link.
Open invite and share links.
Log in with your email or Google.
What you need the app for
Booking courts and matches, activities and private coaching.
Buying memberships and club wallets, and joining leagues.
Your profile, settings, friends, messages and notifications.
Cancelling bookings and reporting scores.
If you open one of these pages on the website, you see a link to download the app.
Good to know
The Nettla app is free on the App Store and Google Play. If your club has its own app, use that one instead.