How to reserve sites with Copenhagen Card

We used a Copenhagen Card a few weeks ago. We didn't go to the Rosenborg Castle so can't speak to that exact experience. We did use it for Vor Frelsers Kirke (Church of Our Savior); for that one we booked a time slot online, indicated copenhagen card, and then showed the app when we arrived. We booked slots the same day and lucked out because we got two of the last time slots. (True confessions: we only got 1 reservation approved, but the obviously-harried ticket window person let us both go up.) So my suggestion is that if you really want to go to Rosenborg, and have some flexibility, plan your day around that. For everything else, we didn't have any problems using the card and nothing seemed overly crowded. We were there the last week of May.

(Also, in 2024 we went to the Hans Christian Andersen museum which requires a timed entry ticket - which we booked about an hour before we entered. We were the day after Ascension Day, which is a national holiday, and it was not overly crowded. So depending on when you travel, your 'hope for the best' might not be risky.)

I guess they have a few tickets reserved for same day purchases on-site. So if it's fully booked online it might be still possible to use CPH card if you arrive some time before they open. This way both the castle and Copenhagen card avoid bad reputation. But it's only a guess.

When are you going, mikedunn1? I'm going in September and planning to buy the Copenhagen Card, so thanks for bringing this to attention. I probably would've wrongly assumed you could select "Copenhagen Card" when booking a timeslot online.

I found this thread from last year https://community.ricksteves.com/travel-forum/denmark/timed-entry-into-rosenborg-palace

If you go before I do, can you please report back?

Thank you Tricia, Anders and Mary. That older post you found, Mary, has the answer!

We will be there starting Monday June 23 through July 2. I will come back and let you know how it goes!

Thanks again.

Thanks, and have a great time!

Mary, it worked out fine for us. We visited late morning on Thursday, June 26 and there was no line for tickets; we walked right up and showed them our Copenhagen Cards. We then received timed tickets for approximately 45 minutes later. If the wait had been significant, we would have gone elsewhere and come back. Instead, we put our bags in a locker, used the restrooms, hung out in the courtyard, then got in line 5 minutes before the ticketed time. It was very easy and pleasant, despite not having reserved a day/time.

As we left two hours later, I noticed there was a short line for tickets, but not huge.

By the way, here's what we used the Copenhagen Card for over five days:
Tivoli
Stromma Canal Tour
Rosenborg Castle
Glyptotek Museum
Christianborg Palace
Fredericksborg Castle
And is Roskilde, the Viking Museum and Roskilde Museum

Factoring in transit, it was well worth it for cost and convenience.

Good luck and enjoy!

Thank you so much for the follow up, mikedunn1! This is so helpful and reassuring.