is there a way to add monthly subscription with stripe?

All plans are annual.

https://nicepage.com/premium

...................................................
Sincerely,
Alan R.
Nicepage Support Team

Please subscribe to our YouTube channel: http://youtube.com/nicepage?sub_confirmation=1
Follow us on Facebook: http://facebook.com/nicepageapp

That's not what they asked - they want to add a subscription to their website not yours!

Hello,

Please check our latest released notes, there you will find more information regarding payment and product options with Nicepage.
https://nicepage.com/doc/433236/payments-with-stripe-order-notification-and-maintenance
https://nicepage.com/doc/429121/build-e-commerce-websites-in-nicepage
...................................................
Sincerely,
Anna.
Nicepage Support Team

Please subscribe to our YouTube channel: http://youtube.com/nicepage?sub_confirmation=1
Follow us on Facebook: http://facebook.com/nicepageapp

the answer to my question isn't there, they don't talk about monthly subscription at all

Hello,

We are sorry, but the listed above payment methods and product options that's what Nicepage lately released.
For now, we don't have the possibility of adding monthly subscriptions, but we added your proposition to our wishlist.

...................................................
Sincerely,
Negat Veri
Nicepage Support Team

Please subscribe to our YouTube channel: http://youtube.com/nicepage?sub_confirmation=1
Follow us on Facebook: http://facebook.com/nicepageapp