In reply to.
In fact, what I need from an invoicing app is so simple (manage customers, create/edit invoices, send email) that I’m going to attempt to tackle this myself. Like, I don’t charge VAT—I’m that small a business. I don’t really do anything recurring, either. And mostly hard-coded templates would work just fine. Heck, I used to use Google Sheets before, and send everything out myself!