EasyVial lets you shop a supplier's website inside an app. We don't ask you to create an account. Each install gets an anonymous identifier so we can show your order status and send notifications you've allowed.
Payment, shipping and account details you enter on the store's website go to that store and its payment processor, not to us. Each store's own privacy policy covers that data.
Use Account → Delete my data in the app to remove everything we hold for your device.