When you are going to build a mobile application for your business or organization, choosing a right database for your application that can be appropriately align and work with your mobile apps is the most important part of any project. Data synchronization and Offline capabilities are primary concerns that need to be well planned and structured before you going to build your mobile applications.
Now days, responsive HTML5 web based applications are more popular that work on all aspects of platforms like web/desktop and different mobile operating systems. Also various enterprises, ecommerce and social apps provide web/mobile access to their users. Those applications need real time data synchronization and offline capabilities as well. Several database and cloud service providers offering data synchronization and offline capabilities. So when you are going to build your application, make sure you are selecting right database for your application. It does not matter to your current requirement but for future aspect we need to take into the consideration to saves time and money when you need future expansion.
Here are the names of providers that you can trust and consider your reliable database. Amazon Cognito, Google Firebase, Microsoft Azure Mobile Services and Couchbase Mobile are those providers offer all necessary sync that enable both offline and online working of your application.