Your Simpl bill is generated twice a month.
All your transactions between 1st and 15th are added into one bill, which is generated on the 15th.
All transactions made between 16th and 30th/31st are added into one bill, which is generated on, you guessed it, 30th/31st.
Of course, you can choose to pay for your transactions even before your bill is generated. You can do so by logging into your account via our website or app.