Purchases from your own app

Settings → Tracking & unsubscribe gives you a tracking key and an address. Call it from your shop or product when someone buys:

https://your-app-address/api/hook/convert?key=YOUR_TRACKING_KEY&email=sara@example.com&value=49

Every lead with that email becomes a customer, following up stops and the purchase shows in your reports. The value is counted once, and saved as the deal value unless you set one yourself.