Flex Fields

Flex Forms is a modular and flexible form builder plugin for WordPress, designed to be lightweight yet feature-rich. It allows you to quickly build forms with various field types, manage submissions, and integrate with your theme and workflow easily.
Key Features:
<ul>
<li>Easy form creation via WordPress admin</li>
<li>Drag-and-drop field ordering</li>
<li>Email notifications on submission</li>
<li>Submission storage in database</li>
<li>Google reCAPTCHA v2/v3 support</li>
<li>Custom shortcode per form</li>
<li>SMTP email sending support with test email</li>
<li>Force “From” email override (site-wide)</li>
<li>Full integration with <a href="https://flex-fields.com/" rel="nofollow ugc">Flex Fields</a></li>
<li>Developer-friendly hooks and filters</li>
</ul>
<h3>External Services</h3>
Flex Forms may interact with third-party services depending on your configuration:
<h3>Email Sending</h3>
Flex Forms supports custom SMTP configuration for reliable email delivery.
<ul>
<li>What data is sent: Form submission content (user input).</li>
<li>When data is sent: When a user submits a form or when a notification is triggered.</li>
<li>Where data is sent: To the configured email recipient(s) via your selected email service provider.</li>
<li>Privacy & Terms: Email service providers’ policies apply (e.g., SendGrid, Mailgun, custom SMTP).
<ul>
<li>Example terms:</li>
<li>SendGrid: https://sendgrid.com/policies/tos/</li>
<li>Mailgun: https://www.mailgun.com/legal/</li>
</ul>
</li>
</ul>
<h3>Google reCAPTCHA</h3>
Used to prevent spam form submissions.
<ul>
<li>What the service is and what it is used for: 
Verifies that a user is human when submitting a form.</li>
<li>What data is sent and when: 
The user’s IP address and browser information are sent to Google when the user interacts with a reCAPTCHA-enabled form.</li>
<li>Where data is sent: 
Google servers.</li>
<li>Privacy & Terms:
<ul>
<li>https://policies.google.com/terms</li>
<li>https://policies.google.com/privacy</li>
</ul>
</li>
</ul>

Flex Forms

A lightweight yet powerful form builder with database storage, email alerts, reCAPTCHA, SMTP configuration, and deep Flex Fields integration.

AMP-MODE

Scott DeLuzio

If you sell a product through your WooCommerce store that requires you to collect some additional information from your customers before they complete their purchase, this plugin is exactly what you need.
Pro Version Now Available 
<a href="https://conditionalcheckoutfields.com/downloads/conditional-woo-checkout-field-pro/" rel="nofollow ugc">Update to Pro</a> to get even more features.
<ul>
<li>Display an unlimited number of custom conditional fields at checkout (free version only allows one).</li>
<li>Display each conditional field on an unlimited number of products, product variations, or categories of products (free version only allows the field to display for one product).</li>
<li>Increased variety of available input fields including: Text box, multi-line text area, drop-down/select menu, country list, state list, check boxes, password, radio buttons, and date picker.</li>
<li>Bonus: Easily edit any of the default WooCommerce checkout fields without having to edit any code.</li>
</ul>
Get the pro version by <a href="https://conditionalcheckoutfields.com/downloads/conditional-woo-checkout-field-pro/" rel="nofollow ugc">clicking here</a>.
This plugin lets you configure an additional field to be displayed at checkout for your customer to fill out provided a certain product is in the customer’s cart.
The plugin allows you to customize this additional field’s
<ul>
<li>Title</li>
<li>Input type (text box, text area, or select/drop down menu)</li>
<li>Label</li>
<li>Placeholder text</li>
<li>CSS Class</li>
<li>Whether or not the field is required (and the error message to display if it is required but not filled out)</li>
<li>Whether or not to add the customer’s input to the order email or invoice</li>
</ul>
This plugin requires your site to have WooCommerce installed in order to work. It is not compatible with other e-commerce plugins.

Conditional WooCommerce Checkout Field

Display a custom field at checkout in your WooCommerce store if a certain product is in the customer's cart.

Flex Forms vs Conditional WooCommerce Checkout Field