The Bolus Calculator is one of the Pro features of the mySugr app. You can find further information about Pro and Basic features here.
For pricing information at your location, please check the App Store or Play Store.
But we have good news! If you connect any of these Accu-Chek devices you can activate mySugr PRO for free. Sync your blood glucose values once a month and get access to all mySugr Pro features.