Trainerize is a free online personal training platform designed for fitness professionals and studios to connect with their clients. This app provides a personalized client-trainer experience, allowing fitness professionals to manage their coaching business from their smartphones and stay connected with their clients anytime, anywhere.

The app's features for fitness professionals include building and delivering customized training plans, tracking progress, managing workout calendars, delivering meal plans, and messaging clients in real-time. With the ability to add-ons and extend their business and services, Trainerize is an all-in-one solution for fitness professionals.

For clients, the app provides access to their training plans, the ability to schedule workouts and track progress, access to meal plans, and messaging with their coach in real-time. Clients can also review past progress stats and graphs, set push notification reminders for scheduled workouts, and connect with Withings devices to sync body stats instantly.

It's essential to note that Trainerize is a companion app for businesses that use Trainerize, and an online account is required to use the app. Clients must ask their trainer for their account details to login to the app. For more information, visit the Trainerize website.