Transitioning from developing mobile apps to creating an SDK, the author discusses the unique challenges faced in this new role, particularly in their position as Product Owner and iOS team lead at Luciq, which focuses on bug reporting and in-app feedback. Unlike app development, SDK development involves heightened pressure to avoid crashes, as any failure in the SDK could ironically cause the app it's integrated into to crash. Debugging is more complex due to the inability to see the host app's code, and there are stricter constraints, such as minimizing dependencies to keep the SDK lightweight. Integration simplicity is prioritized to facilitate ease of use for developers, and maintaining support for older iOS versions becomes crucial due to the diverse needs of the apps using the SDK. Additionally, the SDK's UI must be customizable to blend seamlessly with various app designs, presenting a creative challenge. Despite these constraints, the author finds the process rewarding, noting the satisfaction of their work running on millions of devices.