The Net Promoter Score (NPS) survey is a simple two-step survey that takes just a few seconds to complete, used to test app user loyalty. The survey consists of one numerical question and an open-ended text response, with the score calculated by subtracting the percentage of detractors from the percentage of promoters. A higher score indicates better customer satisfaction and loyalty. NPS is considered more valuable than customer satisfaction surveys as it measures loyalty rather than just satisfaction. Industry benchmarks can be useful for comparisons, but should be taken with a grain of salt due to contextual variables. Analyzing verbatim responses and paying attention to common themes can provide actionable insights. Targeting the survey audience and choosing custom conditions for when users see the survey can increase response rates. Closing the loop by sending thank you messages and follow-up actions can make users feel heard and valued.