"This post enlists the prominent local databases to watch out for in 2022 if you are planning to develop an app with React Native. "

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Prominent Local Databases used for developing Applications
with React Native!
React Native has become the most talked-about technology in the last couple of years. Its
popularity as a cross-platform framework due to cost efficiency has made React Native
Development the most preferred development technology in the tech world. Due to the ever-
growing demand, developers are expected to build highly performant apps. One of the
challenging decisions while architecting React Native apps is to select the right database for the
project. The good news is, that the React Native framework comes with some really good choices
available for data storage. So, in this blog, we will shed light on top React Native databases for
2022. Let’s explore them in detail. But before that, let’s quickly run through the significant factors
that should be considered while choosing the apt database for React Native projects.
Variables to be considered while choosing the Apt Database for
Your Project
Data and App Complexity: complex data sets in the applications can cause severe app
performance issues. So, databases that can store complex data should be chosen. Apps that have
lower complexity can use simple databases so that such apps can be easily synced with the
server. But complicated apps with multiple-user collaboration requirements require a complex

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database for ensuring seamless syncing.
Memory Handling: Inadequate database memory management can lead to the crashing of apps.
Hence, it should be ensured that memory management is done efficiently through processes like
compaction, garbage collection, etc.
Line of Codes: If a higher number of code lines are used in a project for CRUD-like operations,
then an advanced database should not be the choice as the coding gets more cumbersome. This
code complication deteriorates the performance of the app significantly.
Data Conflicts: the possibility of data conflicts increases when more collaboration-related features
are added to the app and data is being used concurrently. So, it is always good to select a
database that handles data conflicts and concurrency and shares the conflict handling policies on
the website or at least on repository pages.
Top Databases for React Native in 2022!
Realm
Realm is an object-oriented database that enables the creation of real-time and offline
applications that run on both- wearable devices as well as smartphones. It is one of the top React
Native databases amongst all the available ones. This database is highly preferred when the end
goal of the project is building high-performance apps that can deal with a huge data flow. The
database benefits both platforms- iOS and Android. It doesn’t depend on key-value stores as it
has its own database engine. Realm allows the React Native app developers to frequently
undergo tables, mapping classes, fields, foreign keys, etc.

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Key Advantages of Realm:
• Makes use of multiple encryption standards to ensure good security for diverse mobile
platforms
• Realm Synchronization service works locally in the background for recording user
interactions and service requests and sends the data to the server after the device goes
online.
• Redux offline can be used to fulfill offline-first architecture requirements.
Firebase
For React Native development, Firebase supports real-time NoSQL DB. This database is known for
its offline data modifications and data synchronization capabilities. Besides, it can handle M
(model) and C (controller) of the MVC that is needed while building React Native applications.
Key Advantages of Firebase:
• This database allows real-time data syncing for all the clients simultaneously.
• Firebase offers a cross-platform API that can be easily set up with minimum effort.
• Firebase database can be directly accessed with a mobile device and so, the application
servers are not needed.
• Firebase supports the creation of real-time apps with offline persistence capabilities.
SQlite
SQLite is a relational database management system developed for offering local storage to React
Native applications. ‘Lite’ in SQLite depicts the lightweight nature of this database. Also, this
database is very easy to set up. It can be directly integrated with mobile applications for accessing
the database. For data encryption, SQLite can be used with an extension called SQLite Encryption
Extension (SEE).
Key Advantages of SQLite:
• This database can support offline persistence, simply by using a react-native-SQLite-
storage plugin for data management within the mobile app.
• SQLite is ACID-compliant and employs most of the SQL standards with just a few
omissions. It comes with a file-based library architecture and some tools for easily and
efficiently handling all data types.
PouchDB
This is a JavaScript database developed using a storage mechanism and CouchDB protocols. It

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stores the data in JSON format. This open-source database enables the React Native developers
to read, create, delete, update, and query the objects using a singleJS API.
Furthermore, PouchDB is compatible with MongoDB, CouchDB, PostgreSQL, and MySQL.
Key Advantages of PouchDB:
• It allows data syncing using a supported server for running the apps online as well as
offline.
• Ensures speedier execution of queries.
• Also, as PouchDB remains inside a browser, it is not necessary to run queries over the
network resulting in faster execution of queries.
Vasern
This is an open-source, lightweight, and fast database used for React Native-based application
development for both- Android and iOS. It is developed with a robust server-side language-
Golang, created by Google. Vasern’s API can also be utilized for syncing across app clients, local
storage, and for cloud storage.
Key Advantages of Vasern:
• Vasern ensures good performance of apps and speedier operations
• Provides end-to-end database syncing
• Support basic data types like string, double, int, double, reference, DateTime, etc.
• Provides support to languages that use UTF – 8 coding.
Watermelon DB
This database is built on top of SQLite. It can scale a myriad number of records without impacting
the application speed. This database is perfectly optimized for complex apps built with React
Native that ensures real-world performance.
Key Advantages of Watermelon DB:
• It is a fast, multi-threaded, relational, and highly cached database.
• It supports an offline first system for syncing with your own backend.
• It allows static typing with flow
BerkeleyDB
This is a high-performing backend and allows the developers to handle data in several ways. It
comes with an API that is compatible with numerous languages and several platforms like Android

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and iOS.
Key Advantages of BerkeleyDB:
• Simple to use
• Provides support for industrial-strength transactions
• Ensures concurrent access for multiple users
AsyncStorage
This is a local storage database and comes in-built with React Native. It enables developers to
persist data between reboots of the apps. It acts as an outstanding solution for saving the data
that the app required, even when the app is being closed by the users.
Concluding Views:
Apart from the local databases mentioned here, there are several other databases available for
the React Native app developers to utilize in their projects. But, the choice of a database ultimately
depends on the project requirement, its scope, and end goals. For instance, Firebase suits
perfectly when one has to develop real-time apps. Realm is great for almost every possible
requirement, but comparatively, SQLite doesn’t provide the same level of performance,
scalability, and security. Rather SQLite is good to go with when one needs to leverage the abilities
of a relational database. So, the one that suits your requirements is the best choice for you.
Here we come to an end! We hope this write-up was insightful.