How do I let regulars reorder in one tap on WhatsApp?

Send a reply button such as “Same as last time?” on the WhatsApp Business API and a regular reorders with one tap. In the free Business app, a saved quick reply gets you close.

• API: a reply-button message offers up to 3 choices, such as “Same again”, “Change order”, “See menu”. It needs no template inside the 24-hour window.
• Free app: save a quick reply (you can keep 50), such as “Same as last time? Reply YES”, and send it by typing “/”.
• Label your regulars (the app allows up to 20 labels) so their chats are easy to find.
• The button only saves typing if something remembers the last order: your notes or your ordering system.
• Outside the 24-hour window an “order again” nudge must be a template, and promotional templates are billed as marketing (₹0.8631 in India).