Shopperbird, an app focused on sustainable fashion through upcycling, has received mixed reviews. Users appreciate its unique mission and the ability to connect with designers for custom clothing. However, many have noted issues with the app's user interface, slow loading times, and unclear communication of its core concept. Some users have also reported concerns about the app's use in job application processes, suggesting it may be a tactic to gather reviews. Overall, while the concept is praised, the app requires improvements in usability and transparency.