People tend to have personal-trainers because they want someone who can keep them motivated all the time and push them throughout the process with specific routines and equipment. This is something that people love but on the other side there is a price to pay for it. Personal trainers are really expensive at many major gyms in the U.S., personal trainers can cost $60 or more per hour. With this prices people move to their second option which is mobile app which make their cell phones cluttered. All this app have a lack of motivations and they have a gaming-like that make people to abandon their training after they lose their interest. Serena has been created as a personal-trainer mobile application that will help users develop healthy daily routines and help them track their progress with a voice assistant feature and nutritional tips.