Frequently Asked Questions

Performance issues in React Native apps are almost always caused by how the app is built, not by the framework itself.

Common causes include unnecessary re-renders, inefficient list handling, or too much work happening on the JavaScript thread.

These issues can usually be identified and resolved through profiling and a structured analysis of the codebase. In many cases, even a short review is enough to uncover the main bottlenecks.

Improving performance starts with identifying bottlenecks using profiling tools and a structured review of the app.

Most issues come from inefficient data flow, unnecessary work, or work happening at the wrong time. Based on this analysis, the app can be optimized step by step.

Typical improvements include reducing re-renders, improving list performance, and adjusting parts of the architecture for better long-term results. A focused assessment is often enough to define the most impactful next steps.

This depends on both the current state of the app and the plans for its future.

If the core architecture is still solid, a focused refactor can often resolve performance and maintainability issues. If there are deeper structural problems or a major redesign or product shift is planned, a rebuild can be the more sustainable option.

In practice, many rebuilds reuse parts of the existing codebase and are closer to a structured core refactor than a full restart. A short technical assessment usually helps to make that decision.

Yes, working with existing codebases is a common part of our work.

We usually start with a structured review to understand the current state, identify risks, and define next steps. From there, the application can be stabilized, improved, or evolved depending on the goals.

We integrate into existing teams rather than working in isolation.

This includes aligning on processes, contributing to the codebase, and sharing knowledge where needed. The goal is to support the team and improve the product together.

bitglow focuses specifically on React Native and Expo, with a strong emphasis on performance, maintainability, and long-term product success.

A large part of the work involves improving and scaling existing applications, not just building new ones. The goal is to be a reliable technical partner over time rather than a short-term delivery provider.

The cost of a React Native app depends on factors such as scope, complexity, performance requirements, and the current state of the project.

Instead of fixed pricing, it is usually more effective to start with a short discovery phase to define requirements and priorities. This allows for a more realistic estimate based on the actual needs of the product.

Yes, we build both mobile and web applications.

While mobile is our primary focus, web development is a natural part of many of our projects. We regularly work on both sides and make sure that mobile and web fit together as a cohesive product, rather than treating them as separate initiatives.

We also support teams on web-only projects, especially when there is a strong focus on product quality, performance, or long-term maintainability.

React Native allows you to build iOS and Android apps with a shared codebase, which reduces development time and ongoing maintenance effort.

At the same time, it enables high-quality user experiences when implemented correctly. For the vast majority of applications, it offers a strong balance between speed, cost, and performance.

There are edge cases with very specific requirements where fully native development can make sense. However, most products can be built very effectively with React Native.

Yes, Expo is widely used in production and has matured significantly over the past years.

It simplifies many aspects of development, such as builds, updates, and integrations. This helps teams move faster while reducing overall complexity.

For most applications, Expo is a solid choice. If needed, it can be extended with native code for more specialized requirements.

Yes, React Native can scale to large and complex applications when the architecture is set up properly.

Its component-based structure can make it easier to manage and evolve large codebases over time. Many of the challenges teams encounter are not specific to React Native, but relate to growing complexity, unclear data flow, or architectural issues.

With a solid foundation, React Native works well for long-term, evolving products.