Innovative therapy with the use of CAR-T cells for the treatment of cancer has shown surprising results, being considered one of the greatest advances against some types of hematologic malignancies. However, despite impressive results, treatment with CAR-T cells can result in important adverse effects, such as cytokine release syndrome and possible central nervous system toxicity. This application aims to assist the physician in grading complications related to CAR-T cells and in the proper management, quickly and easily. In addition, it will be possible to identify the cell therapy products available in Brazil.The Cartlog application is a tool intended exclusively for healthcare professionals, providing information and resources to assist in understanding and managing graduations associated with CAR-T cells.Cartlog is a complement to medical knowledge and skill, not a substitute. It serves to help medical professionals better understand and navigate the complexities of CAR-T cell therapies. However, final decisions about diagnoses, treatments and other clinical aspects must always be based on the professional judgment of the physician, considering the specific case of each patient.When in doubt, always consult a doctor.