Still using 1password across all my devices. They've made it much easier to do the setup and use it over the years.
For example, there's a scanner pop-up in order to scan the QR code (you just position it over the qr code and release it) for a web page or you can just copy and paste the seed manually.
And the OTP is automatically copied to the clipboard when you fill in a sites login/password info using 1pw.
to answer the question from 5 years ago, the OTP is available on all your devices syncing and using the same vault.
If I wasn't entrenched in 1password, I'd probably use authy because it's able to sync all instances via the cloud.
-David