It is not necessary to worry about that you need not have any website/ app for selling. Make your customers pay online just by sending payment links.
You can substitute payment link for cash on delivery and point of sale payment methods in your business
You can give your customers a quick check out option by sharing payment link over social media platforms like Facebook, Instagram, whatsapp etc
Create a payment link using customer’s name, amount, phone number, Email
Share the payment link via Email or SMS
Now customer can pay using
Notification is received once the payment is completed