People have always valued privacy. Developments of the past decades — the internet, social networks, targeted advertising — turned data into an asset. The AI wave multiplies what can be inferred from crumbs. Phones and apps are integral to people’s lives. Some users keep everything on their phones; others are more restrictive. It shouldn’t rely only on user awareness: developers should provide the first line of defence and the tools that protect a user’s right to privacy. Even if you already deal with most of these pieces daily, I want to share my mental model — how I frame decisions with checklists and a few concrete examples from practice.