Developers dedicate a significant portion of their time, over 30%, to creating internal applications, with figures reaching 45% in companies with more than 5,000 employees. This trend is driven by the need to enhance productivity across various business teams, as evidenced by a survey of 650 developers and technical leaders. Internal tools, essential for efficient operations, became even more crucial during the COVID-19 pandemic, with 87% of developers increasing or maintaining their focus on these applications. Companies, especially in the financial sector, prefer tailor-made internal apps for better control over data and workflows, leading to a high demand for custom-built solutions, although low-code and no-code platforms are gaining popularity due to their efficiency and developer satisfaction. These internal tools are deeply integrated with various data sources, supporting a range of functions from customer support to engineering, and are pivotal in improving employee productivity, reducing costs, and enhancing satisfaction. Despite the challenges developers face, such as time constraints and the need for significant impact, the integration and flexibility of internal apps continue to play a vital role in modern business operations.