FeastByFist is a food diary application that utilizes cutting-edge AR (Augmented Reality) portion control technology. This innovative app simplifies meal planning by overlaying an AR portion circle on your food, aiding in portion size decisions. By promoting mindful eating and preventing overconsumption, FeastByFist assists users in adhering to various diets like Whole 30, Keto, and South Beach. Additionally, the app encourages sharing progress with friends and family to boost motivation.

FeastByFist's emphasis on portion control aligns with environmental consciousness, aiming to reduce individual consumption for a global impact. Users can snap meal photos with the AR camera technology, set personal goals, track progress, and access personalized plans. The app offers subscription options of $6.99 per month or $45.99 per year, with a two-week free trial available for new users.