我的离子项目最好的数据库

I’m looking for the best database to use for my ionic project. I want the user to store the database locally with the option of synchronizing that information a remote database as a payment option. Their data will be from any device by login to their user account. I have been looking at firebase Couchdb, and Parse but don’t know what I should go with. I have to keep in mind scaling my app. What are the best options out there? I’m looking for the best database to use for my