PEGASO comprises seven different apps. The objective of the PEGASO Companion app is to encompass the other six apps and provide a seamless and unique experience to the participant. Companion App. The aim of the Companion App is to make active life more attractive, helps participants to eat more healthily and connects participants with their peers. Developed as native Android application (client + server), the Companion is a Personal Digital "Friend" acting as a daily-life guide for coaching, caring for, and empowering the participants in their activities toward healthy habits. The Companion App will allow the user to have dynamic stream of information (about their achievements and the achievements of the other users that chose to connect with the user within the PEGASO system) and to access all other applications. Data acquired via sensors (embedded in the Smartphone or garments) will be presented to the user via a specific interface developed inside the Health Companion App. The Companion App also includes a rewarding system and the gamification module will allow the system to: achieve One time rewards, achieve Cyclic events and achieve Rewards (e.g., fit coins, badges, experience points) for the selected target behavior (diet or physical activity). Challenges app. The Companion app includes a "challenge" component which participants can use for creating and accepting different type of challenges. This application allows users to challenge themselves and other users in a competitive or collaborative way. eDiary app. The eDiary is an application that allows the participant to enter some information about their diet and provides feedback about the healthy eating habit. This app will also provide suggestions (e.g., food groups and recipes) to the user to improve the dietary habits. The eDiary app is gamified in order to improve the participants' experience and to introduce an element of fun that can sustain engagement with the app and eating habits. PEGASO City app. The PEGASO City is a bridge between the digital world of the PEGASO system with the physical world. The app has a twofold role inside the PEGASO Health Companion: firstly, PEGASO City helps teenagers to find places that are part of the PEGASO Stakeholder Ecosystem, and that provide them opportunities to act healthy and progress towards the reach of their target behavior. Secondly, through the empowerment provided by the integration of some of the HealthSquare functionalities, the application provides the teenagers a set of possible interactions and actions that contribute to the gamification process and the rewarding system. Dashboard app. The Dashboard is an application that allows to see all the data acquired by the PEGASO system. The app shows all the activities data such as steps and minutes of activities, sleep time, type of activities made during the course of the day; in addition, it reports if the user reaches the target behavior and awards him/her with badges and trophies. Thanks to the Dashboard the participants are able to check their behavior and perform reflection and self-monitoring by extracting suggestions from the apps. Users can also control the battery and memory status of each PEGASO device. Smart Garments and bracelets sensors. Smart garments consist of a t-shirt/crop top with embedded textile electrodes. The t-shirt/crop top comes with a data logger (monitoring/recording system) which snaps on the front side of the t-shirt by using standard snap buttons. The smart garments measure heart rate (ECG) and physical activities (accelerometer) whereas the bracelet monitors physical activities and sleep. Data collected through garments and bracelets are transferred to a smart phone and linked to the Health Companion app as well as the serious game. Participants will be provided with a User Manual in local languages. Serious game. The game serves a central role as the motivational component of PEGASO. As such, it needs to entertain and engage the player, whilst utilizing the PEGASO ecosystem to capture information about lifestyles and encourage positive health behavior changes. There are two central behavioral mechanisms within the game: a) an "energy bar", used up by the player's actions in the game, and replenished by them achieving their behavioral goals such as increased physical activity or improved diet, and b) the game implements "research" mechanics that require the player to apply and develop their nutritional knowledge of various food sources. The current game format is an infinite game which, through the energy mechanic, promotes regular use and goal-achievement within the PEGASO ecosystem, as well as being conducive to short, frequent play rather than long single sessions. PEGASO Web Portal. The PEGASO Web Portal allows participants to socially interact and learn via training module; two (technological): aggregate data and services across the whole PEGASO platform (images, video, blog materials, activities data, no. of steps, no. of km). Potentially users of the PEGASO Portal are teenagers, parents and experts. The Web portal is accessible from both mobile devices and computers. Report App. The connection between the PEGASO ecosystem and the personal health folder is established through the BRIDGE system and will be deployed and tested in two pilot sites only: namely Lombardy region and Catalonia. The BRIDGE allows extracting health data collected and elaborated into the PEGASO ecosystem and to create a report to be shared with physicians into the personal health folder (PHF).