[hillelcoren]

Many people have asked how this will be sustainable if it's free?

Enabling a ‘Pay Now’ button on an invoice requires configuring a payment provider. PayPal can be good when starting out but as you grow other providers may make more sense.

We will have affiliate links to these providers and will earn a small commission if people sign up.

The most expensive part of this sort of app is the development costs and I work for free. If we were hosting pictures or videos server costs could be an issue but invoice data is just text. I also have an amazing partner who is backing any financial concerns.