how to keep all devices loged on, espically the phone app

I have to logon on my phone every time I want to use Ventusky. There is no place during the logon to ask to stay connected!

aiink
The app should stay signed in. However, please keep in mind that with Premium, you can be signed in on up to 4 devices at the same time. If you need more, you’ll need Premium+, which supports up to 25 signed-in devices.