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WhatsApp doesn’t need a form to collect information — a ChatSyncs Keyword Replies flow can just ask, one question at a time, like a real conversation, and save each answer as it comes in. Example:
Each answer gets saved to a Custom Field the moment the customer replies — no form, no extra app, just a chat.
Automation actions panel showing Save to Custom Field
1

Build the questions in Keyword Replies

Use a Keyword Replies flow — see How to Create a Keyword-Based WhatsApp Chatbot — chaining one message block per question.
2

Save each answer to a Custom Field

After each question, use a Save to Custom Field action so the reply is stored on the subscriber’s profile — see How Do I Manage Custom Fields and Labels? for how fields work.
3

Use the saved details later

Reference the saved values in future messages, e.g. Hi #name#, or use them to personalize a broadcast.
Need strict, one-question-at-a-time validation (e.g. reject a reply until it looks like a valid email)? Use a User Input Flow instead — it’s built specifically for structured data collection with reply validation.

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Frequently asked

A Keyword Replies flow with Save to Custom Field feels like a normal chat and is easy to build. A User Input Flow is built specifically for structured data collection — with reply validation and a dedicated question-by-question structure.
On the subscriber’s profile as custom fields — see How Do I Manage Custom Fields and Labels? — visible in Subscriber Manager and usable in future messages or broadcasts.