Pogozo allows you to send invoices to clients in a number of different ways, including the following.
From the menu, select Finances.
Locate the relevant invoice.
Tap the 3 dots.
Tap Email.
Alternate method for sending an invoice to a client:
From the menu, click Clients.
Select relevant client.
Tap Finances.
Find the relevant invoice.
Tap the 3 dots.
Click Email.
An emailed invoice will now be sent to the client.