If loyalty of brand A is "80%" and the number of customers is "100 people", Next time 80 people will use Brand A again, and 20 people will use Brand B. Calculation is repeated in this condition, and you can observe change in the market share between the two brand. ■Main function of App 1. Show simulation by circle size. 2. Show simulation by line graph. 3. Output CSV file 4. Output graph image