LB Trainer is a solution for personal trainers. It simplifies complicated tasks, automates time-consuming jobs, and provides a clear vision in training. This allows trainers to concentrate solely on their gym members during workout sessions with confidence. Evaluating posture through joint movements and angles can be very complicated, but with post-filming and deep learning, it becomes simple. Estimating the portion or nutrition of food can be time-consuming, but now it takes just two seconds. Big data can be used to predict member's body composition, and visualized data can show if they are on track to reach their goals.