Your PDFs Never Leave Your Pocket: Building a 100% Offline RAG App with Gemma 4 + LiteRT-LM 🔒📱

"We'd love to use AI on our internal documents… but legal said no."

If you've ever worked with a German Mittelstand company — or honestly, any healthcare provider, law firm, or financial services team anywhere in the EU — you've heard a version of this sentence. And legal isn't being paranoid. They're being correct.

The moment an employee pastes a contract, a payslip, or a patient record into ChatGPT, that document becomes someone else's processing activity. Under GDPR Article 28 , the cloud AI provider becomes a data processor. You stay the controller. If those servers sit in the US, you've also tripped Chapter V transfer rules and the ghost of Schrems II .…