Hematologist calculator app is a helpful tool in everyday medical practice in the care of patients with proliferative cancer. Tool to assess creatinine clearance, which is most easily obtained parameter estimating glomerular filtration rate (GFR). This will allow the classification of multiple myeloma by. International System of gradation (ISS - International Staging System). This will help assess the prognostic factors for clinical course of lymphoma, according to the International Prognostic I