20 Seven Fitness is an internal app used by gym employees to manage scheduling, customer subscriptions, training sessions, and more. The app has two user profiles: Admin and Trainer, with features such as adding/updating customer info, checking daily schedules, and searching for customers. Developer Hussain Masarra chose Bubble as the platform due to its ease of use, affordable price, speed, and availability of database and workflow functionalities. With over 11 years of experience in .Net and PL/SQL development, Hussain built the app quickly and at a low cost, with plans to create it as a template and sell it on the Bubble marketplace.