- First phase: During the first three months a feasibility study will be conducted evaluating the use, reliability and satisfaction monitoring symptoms (subjective information) using a smart-phone with the SIMPLe 1.0 application installed. The intervention will be consecutively offered to 30 stable adults (>18 years) fulfilling inclusion criteria. The patient will have to read and agree with the terms and sign an informed consent in order to participate. Sociodemographic data and standardized clinical as well as functional assessments will be administered at baseline, at the first, second and third month of the study. The assessments will include present manic symptoms using the Young Mania Rating Scale (YMRS), depressive symptoms using the Hamilton depression Rating Scale (HDRS), biological rhythms using the biological rhythms interview of assessment in neuropsychiatry (BRIAN), quality of life measured by World Health Organization quality of life assessment (WHOQOL-BREF) and treatment adherence using the Morisky Green 8-item test. A smart-phone device with the SIMPLe 1.0 application pre-installed, will be given to the participants for free during the study with the mandatory condition that it has to be their main mobile-phone during the next 3 months. In the case the patient accepts to participate but doesn´t want to switch from his/her current smart-phone, he/she will be offered the possibility to download the SIMPLe 1.0 application from the App Store and a username and password will be given to use it. The SIMPLe 1.0 application will ask the user by customizable automatic reminder notifications to answer daily and weekly questionnaires based on DSM-5 (Diagnostic and Statistical Manual of Mental Disorders, 5th edition) criteria for a manic, hypomanic, mixed or depressive episode. The use frequency will be measured by the daily and weekly questionnaires answered which will be registered online. At the same time they will receive through the application daily customized psychoeducative messages based on the information collected by the application. Feasibility and satisfaction will be assessed with the application usage log data and an electronic survey, while the app reliability to correctly asses the patients mood states will be analyzed comparing the clinical assessments and the information collected by the application.