SegMetrics
SegMetrics is the CRM solution for finding new leads and optimizing the entire customer lifecycle. It's perfect for detecting where your potential customers come from and their usage habits.
When you integrate your forms.app and SegMetrics accounts, you can create a contact or subscriber profile and add an invoice or purchase to the contact.
You might also like

PayPal
Collect fast and secure payments through your forms.Native

Notion
Create a database with the information you collect from your forms.NativeZapier

Eventbrite
Collect registrations with your forms, create events in Eventbrite.Zapier

nTask
It's easier than ever to focus on your goals and objectives.Zapier