RE: Deffo here :))2 May 2019 11:29
I sent a note to Oculus to ask if the MelodyVR app will be available on the Quest at launch, here is their response:
"Thanks for reaching out to Oculus Support! I understand you're wanting to know if MelodyVR is going to be pre-loaded on the Quest and I'm happy to help.
The Quest will come pre-loaded with 5 demos of different games: Beat Saber, Creed, Journey of the Gods, Space Pirate Trainer and Sports Scramble. You can reference this list by checking out the Blog article we posted yesterday by clicking here.
Additionally, there will be 50 titles available for the Quest at launch, however there's no word on if MelodyVR will be one of them. I suggest reaching out to the developer of the app and seeing if they have any details on this. You can reach their website through the provided link on the Experiences Page!"
So it would appear that @Restless is right in his opinion to be cautious. I'm not sure that MelodyVR would even acknowledge an email asking them the same question.