On-device AI shot tracer verifies $9,557 monthly revenue

US founder Emmett Deen runs a bootstrapped golf-video app alone. AI is applied to one concrete outcome: a golfer uploads a phone video and the app adds a broadcast-style ball-flight tracer in seconds for training and shareable match clips. TrustMRR verifies $9,557 in last-30-day revenue, $6,319 MRR and 1,149 active subscriptions through RevenueCat, tracked since December 2025. The Flutter app says processing is 100% on-device, which can improve privacy, latency and inference cost. Monetization is mobile subscription revenue rather than downloads being treated as income. The profile does not disclose the product name, price, retention, app-store fees or acquisition channels. Accuracy and reliability across different filming conditions also lack independent testing.