The aim of the study is to assess the possibility of using remote monitoring of urination.

Inclusion Criteria:

1. Men over 18 years old.
2. The patient has performed uroflowmetry according to indications in the hospital no later than 7 days before the planned inclusion in the trial.
3. Qmax = or <15 ml / sec.
4. The patient has a smartphone (with Android 4.0 and higher, iOS 10.0 and higher) with Internet access

Exclusion Criteria:

1. A patient with emergency conditions requiring surgical treatment
2. Intellectual and cognitive abilities of the patient that do not allow him to follow the doctor's instructions and make it difficult to use the smartphone.