The link to purchase the app will only show when user have reached the limitation of the Free Edition. (Up to 3 invoices).
![Purchase_3](http://apps.mobilebizco.com/invoiceking/wp-content/uploads/2014/10/Purchase_3-168x300.jpg)
(1) Create at least 3 invoices or estimates.
(2) Then try to create an invoice to trigger the limitation check.
![Purchase_1](http://apps.mobilebizco.com/invoiceking/wp-content/uploads/2014/10/Purchase_1-168x300.jpg)
(3) This will direct you to the purchasing page.
![Purchase_4](http://apps.mobilebizco.com/invoiceking/wp-content/uploads/2014/10/Purchase_4-168x300.jpg)
(4) If you decide not purchase the app and continue to use it, there will be a warning banner that will be displayed that is linked to the purchase.