Mortgage Insurance is typically required by lenders when homebuyers make a down payment of less than 20% of the purchase price. There are 3 companies in Canada that insure mortgages, Canada Mortgage Housing Corporation (CMHC), Sagen and Canada Guarantee. 
The mentioned companies all insure your loan but charge an additional insurance premium. Insurers require a minimum down payment for homes less than $1 million and an amortization of less than 25 years. 
We automatically calculate the insurance premium and the minimum down. It'll add the premiums to your loan when applicable. When it's not required, the app will just grey it out for you.