Subscription needed for beta

Do I Need a subscrition for using the Android beta app? On the screen I see the Information, that I have 7 days for free.
Do I get all the feature until this 7 days?

Weird, I am looking on here an it says nothing about Android:

I am not 100% sure so I am going to refer this to @Vincent for clarification.

Been using for several months and works well on s9. Been without subscription but today states have to wait 17 days to use again, now charging for beta app?

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