Besides a general lack of responsiveness, the observed problems range from malfunctioning download links and authentication mechanisms over confusing data labels and le structures to impoliteness, incomprehensible language, and even serious cases of carelessness and data leakage. It is evident from our results that there are no well-established and standardized processes for subject access requests in the mobile app industry. Moreover, we found that many vendors lack the motivation to respond adequately. Many of the responses we received were not only completely insucient, but also deceptive or misleading. Equally worrisome are cases of unsolicited dissolution of personal data, for instance, due to the