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. An enterprise app with 100K daily users running 5 AI queries per user per day costs $36K to $360K per year in cloud AI fees versus $0 on-device. Here is how to decide which is right for your use case. An enterprise app with 100,000 daily active users running 5 AI queries per user per day costs $36,000 to $360,000 per year in cloud AI API fees. The same workload on-device costs $0 in ongoing fees after the engineering investment to build it. That gap makes the on-device vs cloud API decision one of the most consequential architecture choices in an enterprise mobile project.…