This piece was written for enterprise technology leaders and originally published on the Wednesday Solutions mobile development blog . Wednesday is a mobile development staffing agency that helps US mid-market enterprises ship reliable iOS, Android, and cross-platform apps — with AI-augmented workflows built in. Why attorney-client privilege prohibits sending client communications to third-party AI systems, and how on-device AI enables document summarization, contract review, and voice transcription while keeping privileged data on-device. Sixty-eight percent of Am Law 100 firms had issued internal restrictions on using cloud AI APIs for client-specific work as of late 2025. The reason is not unfamiliarity with AI. It is attorney-client privilege. The moment a lawyer feeds privileged communications into a third-party AI system, they have shared those communications with an entity outside the privileged relationship. That disclosure is what puts privilege at risk. On-device AI solves this.…