Reliability Growth Analysis plays a crucial role in engineering and product development by helping to improve system reliability throughout development and testing phases. ReliaGrowR is open-source software specifically developed to support the analysis of reliability growth data. The package offers a set of simple yet effective functions for analyzing failure data, estimating reliability parameters, and visualizing reliability trends over time. Built on the R programming language, which is widely used in statistical computing and data analysis, ReliaGrowR provides intuitive functionality suitable for both novice and experienced users. The package is lightweight and extendable, allowing for customization and enhancement, making it a versatile tool for both researchers and practitioners in the field of reliability engineering.