Connecting app with online database

Hello,
I have a problem and I'm hoping that you can help me solving it. I want to connect an online database with my windows phone app. The database would have some data which I want to display in the app, users will be able to rate stuff that are in the
database and add some stuff in it. So my problem is that I don't know which database is the best for me to use, a free and a simple one would be great.
Thank you in advance
Otavio

Hi Otavio,
According to your description, you want to public your database content, share and collect content from client apps. You will need to build a virtual machine on
cloud service, install database instance on it, and use
RESTful service to public
CRUD operations. Unfortunately, there is no free version of cloud service. You can use your favor search engine to find more cloud service if you want.
Another option is to use local database, such as
sqlite. It’s free but you will need to do more work on data synchronization.
Regards,
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