If you're creating a completely new mobile app or want to add more functionality to the current app, it can be difficult to determine the suitable database with the many options available today. There are lots of chances that your current database might not be sufficient to handle millions of users and frequent updates. I have compiled a few databases that might come in handy for you.

Databases that you can select from:

1. MySQL: It is very simple to use the SQL database that is open source and multi-threaded.
2. Redis: It is used for data caching in mobile apps. It is also open-source, low maintenance, and key/value store.
3. MongoDB: It is a schemaless, JSON document database, also popularly known for its robustness and flexibility.
4. PostgreSQL: It is a strong, open-source object-based, relational-database that is extremely customizable.
5. Memcached: It is a distributed cache system that is multi-threaded, and is being used majorly for caching objects to accelerate applications by alleviating database load.
6. MariaDB: It is a famous open-source relational database that was developed by the original developers of MySQL.
7. Cassandra: It is an absolutely free and open-source, NoSQL database that is created to manage a huge amount of unstructured data at any scale.
8. SQLite: It is an embedded database properly used to provide local data storage capabilities on smartphones.

How to Select a Database?

Have a look at how you can select an appropriate database for your mobile application:

• Make sure that it supports the right client platforms
• It must secure data at rest and in motion
• It should be a flexible data model. For instance, NoSQL databases offer proper flexibility
• It should be able to resolve data conflicts effectively
• It has to sync at the right times and with the right partitions Understand if you are looking to build sync or just buying.

So, now that you are aware of the little things that are necessary for selecting the correct database, you can go on and get your hands on one.