Can I use a subscription on more than one device?

Yes, make sure that the latest version is installed on both devices for the transfer of the subscription. If you have already entered your e-mail-address in the app on which the subscription was purchased or activated, you can now log in on the second device using this e-mail-address. After entering the one-time-password that you receive by e-mail, you should now be able to use all content on the second advice. (If the e-mail with the one-time-password does not arrive, also check the spam and advertising folders if the e-mail was stored there.) Done.