List of the Top 5 Embedded Database Apps for iPad in 2025

RaimaDB is an embedded time series database designed specifically for Edge and IoT devices, capable of operating entirely in-memory. This powerful and lightweight relational database management system (RDBMS) is not only secure but has also been validated by over 20,000 developers globally, with deployments exceeding 25 million instances. It excels in high-performance environments and is tailored for critical applications across various sectors, particularly in edge computing and IoT. Its efficient architecture makes it particularly suitable for systems with limited resources, offering both in-memory and persistent storage capabilities. RaimaDB supports versatile data modeling, accommodating traditional relational approaches alongside direct relationships via network model sets. The database guarantees data integrity with ACID-compliant transactions and employs a variety of advanced indexing techniques, including B+Tree, Hash Table, R-Tree, and AVL-Tree, to enhance data accessibility and reliability. Furthermore, it is designed to handle real-time processing demands, featuring multi-version concurrency control (MVCC) and snapshot isolation, which collectively position it as a dependable choice for applications where both speed and stability are essential. This combination of features makes RaimaDB an invaluable asset for developers looking to optimize performance in their applications.

What contributes to the platform independence of eXtremeDB? It features a hybrid data storage approach, allowing for configurations that are entirely in-memory or fully persistent, as well as combinations of both, unlike many other IMDS databases. Additionally, eXtremeDB incorporates its proprietary Active Replication Fabric™, enabling not only bidirectional replication but also multi-tier replication, which can optimize data transfer across various network conditions through built-in compression techniques. Furthermore, it offers flexibility in structuring time series data by supporting both row-based and column-based formats, enhancing CPU cache efficiency. eXtremeDB can operate as either a client/server architecture or as an embedded system, providing adaptable and speedy data management solutions. With its design tailored for resource-limited, mission-critical embedded applications, eXtremeDB is utilized in over 30 million deployments globally, ranging from routers and satellites to trains and stock market operations, showcasing its versatility across diverse industries.

VelocityDB distinguishes itself as an exceptional database engine, celebrated for its capacity to store data with unparalleled speed and efficiency compared to rival solutions, all while maintaining a remarkably low cost. In contrast to conventional databases that depend on structured mappings to tables, JSON, or XML formats, it preserves .NET objects in their original state. Additionally, VelocityGraph, an open-source property graph database, works in perfect harmony with the VelocityDB object database. As a C# .NET noSQL object database, VelocityDB, when paired with VelocityGraph, emerges as one of the fastest, most scalable, and versatile database alternatives available today. The development team's commitment to addressing bugs is evident, as issues reported with reproducible test cases are generally resolved within a week, highlighting their dedication to quality. A key benefit of utilizing this database system is its outstanding adaptability, allowing developers to customize their applications to fulfill even the most particular specifications. With VelocityDB, users can choose the most appropriate data structures for their requirements, providing them with control over data's persistent placement, indexing, and access methods. This remarkable degree of customization not only enhances the user experience but also firmly establishes VelocityDB as a leader in the field of database technology, making it an attractive option for developers seeking efficiency and flexibility.

Actian Zen is a high-performance database management system designed for embedded applications, particularly those functioning at the edge, along with mobile and IoT platforms. It effectively combines SQL and NoSQL data models, providing developers with the versatility needed to manage a diverse range of structured and unstructured data. Known for its compact design, scalability, and outstanding reliability, Actian Zen is ideal for resource-constrained environments where steady performance and low maintenance are essential. Moreover, it features advanced security measures and a self-optimizing architecture that supports real-time data analytics and processing without the need for constant management. This system is widely adopted across various sectors, including healthcare, retail, and manufacturing, as it is crucial for handling distributed data environments that support their critical operations. Its distinct attributes make it an attractive option for organizations eager to embrace the benefits of edge computing technologies, fostering innovation and efficiency in their processes. Ultimately, Actian Zen stands out as a robust solution for modern data management challenges.

LevelDB, a high-performance key-value storage library created by Google, is engineered to maintain an ordered association between string keys and string values. It treats both keys and values as arbitrary byte arrays, with the data organized in a sorted manner according to the keys. Users can implement a custom comparison function to alter the default sorting dynamics if desired. The library supports batching of multiple changes into a single atomic operation, which helps preserve data integrity during updates. Moreover, it enables the creation of temporary snapshots, allowing users to capture a consistent view of the data at any point in time. Users can also iterate through the stored data in both forward and backward directions, which enhances the flexibility of data access. To improve storage efficiency, data is automatically compressed using the Snappy compression algorithm. Furthermore, the library interacts with the operating system through a virtual interface, giving users the option to customize interactions with external environments, including file system operations. In practical usage, for instance, a database may contain one million entries, each entry comprising a 16-byte key paired with a 100-byte value. Interestingly, during benchmarking, the values compress to about half their original size, resulting in considerable space savings. We provide thorough performance metrics for sequential reads in both directions and evaluate the effectiveness of random lookups to highlight the library's capabilities. This extensive performance evaluation assists developers in identifying ways to optimize their utilization of LevelDB in diverse applications, ensuring they can maximize the benefits offered by this powerful library. Additionally, understanding these metrics can lead to improved design choices in database implementation and usage.