diff --git a/daily.py b/daily.py
new file mode 100755
index 0000000..b391b72
--- /dev/null
+++ b/daily.py
@@ -0,0 +1,71 @@
+#!/usr/bin/env python3
+
+from datetime import datetime
+import matplotlib.pyplot as plt
+import sys
+
+
+def convert_param_to_dates(x):
+    pair = x.split(',')
+    first = datetime.fromtimestamp(int(pair[0].replace('(', '')))
+    try:
+        second = datetime.fromtimestamp(int(pair[1].replace(')', '')))
+    except(ValueError):
+        second = datetime.now()
+    if first.day == second.day:
+        return (first, second)
+    else:
+        midnight = datetime.fromisoformat(second.strftime('%FT') + "00:00:00")
+        return [
+            (first, midnight),
+            (midnight, second)
+        ]
+
+
+def flatten(array):
+    ret_arr = []
+    for i in array:
+        if type(i) == list:
+            ret_arr += flatten(i)
+        else:
+            ret_arr.append(i)
+    return ret_arr
+
+
+def seconds_to_str(s):
+    hours = int(s//3600)
+    minutes = int(s//60 % 60)
+    seconds = int(s % 60)
+    return f"{hours:02}:{minutes:02}:{seconds:02}"
+
+
+filename = sys.argv[1]
+with open(filename) as f:
+    contents = flatten(list(map(convert_param_to_dates, f.readlines())))
+
+dates = []
+times = []
+current_date = contents[0][0]
+time_in_s = 0
+for i in contents:
+    if i[0].strftime("%F") == current_date.strftime("%F"):
+        diff = i[1] - i[0]
+        time_in_s += diff.total_seconds()
+    else:
+        dates.append(current_date)
+        times.append(time_in_s)
+        current_date = i[0]
+        diff = i[1] - i[0]
+        time_in_s = diff.total_seconds()
+
+dates.append(current_date)
+times.append(time_in_s)
+
+for date, s in zip(dates, times):
+    print(date.strftime("%F"), "\t", seconds_to_str(s))
+
+fig, ax = plt.subplots()
+ax.xaxis.set_tick_params(which='major', rotation=90)
+plt.bar(list(map(lambda x: x.strftime('%a %d/%m'), dates)),
+        list(map(lambda x: x/3600, times)))
+plt.show()