The IQOE Task Team for the Development of a Low-cost Hydrophone and Underwater Acoustic Recorder collected the opinions of 135 hydrophone end-users. This survey aimed to understand the current usage of underwater acoustic recorders/hydrophones and the specific need for a low-cost device. It also represented an opportunity to make sure that the designed device meets as many requirements and challenges faced by end-users as possible. The Task Team thanks all the respondents of the survey for their participation and presents the main findings in these linked infographics.