Mobile in-app surveys are an effective method for collecting user feedback, as they introduce minimal friction to users and align with the expectation of many mobile users for direct feedback solicitation. The effectiveness of these surveys hinges on the quality of the questions posed, necessitating careful consideration of what, how, and when to ask questions. Before crafting survey questions, it is essential to define the survey's goals, identify the target sample, and select an unbiased sampling method. Open-ended questions are suited for qualitative feedback, while close-ended questions provide quantitative insights; both types should be concise, clearly worded, and free from technical jargon or emotional bias. Multiple-choice questions should use scales for nuanced responses and provide exhaustive, mutually exclusive options. Survey design tips include limiting the number of questions, sequencing them strategically, and testing the survey before deployment. Analyzing and acting on survey results is crucial, as is closing the feedback loop by informing respondents of implemented changes, thereby encouraging future participation.