HeatherP

AshleyDillo has it exactly correct. You will dock at Crown Bay and want to jump on one “taxis” to Charlotte Amalie. It’s less than $10pp each way. There are not traditional taxis on St Thomas, they use these open air jungle bus/troop carrier vehicles. 
 
Charlotte is where all the action is. If there were a world record for nearly identical jewelry shops that sell glittery silver, Charlotte Amalie is the undisputed heavyweight champion. But people have their favorite stores, or more correctly stated; favorite family clan they enjoy buying from; myself included.
 
For something off the beaten path and kinda a ‘those who know, know’ place, try the Taphus Beer House in the back of the Caribbean Surf Co. It’s like a speakeasy and they don’t make any effort to tell you that it is there. For the total lack of marketing dollars, all that money went into the decor and……it’s kinda air conditioned! It’s a very hip, cool place and they have tasty craft beers.
 

Wonder will dock at Crown Bay. There is some shopping right at the pier, depending on what you are seeking but there isn't a lot of variety immediately there. You can get a taxi to Charlotte Amalie or Havensight and there will be more shopping in those areas.

We did this excursion in January.  It was perfectly fine for a bus tour, but we would not do it again.  We were really late departing at the beginning of the tour, so we had a reduced amount of time at each stop and felt quite rushed.  We were only able to have about 15 minutes at the beach, so that was disappointing.  The other stops were a little longer, but still quite quick.  The longest stop was for shopping, which we were not really excited about.  But, the driver and tour guide were both nice.  Next time we visit St. Maarten, we will definitely skip the bus tour and take a cab to the destinations we are most interested in.  As far as value goes, not really worth the price we paid.  

When will the packages open for booking?

I find it easier to use the cruise planner on my computer because I hate having to fiddle with the tiny screen and keyboard on my phone, especially when I have to check in all of my technologically-challenged family. 

I think the app is easier, if for no other reason than it can scan your passport saving time.
Pre-covid, check-in via the app was the only way to get the super fast embarkation option, but that isn't a thing that Royal Caribbean has brought back yet.

Can someone please explain how this works?  Can I schedule lunches on sea days?  Dinners get scheduled ahead of time?  Can I eat at multiple locations in a night?  Johnny Rockets included?