Form Builder App offers a fully customizable experience, allowing users to customize the fields and look and feel of their forms. Submissions can be stored in the app, emailed, or both, and users can set up email recipients and optional auto-responders. The app is mobile responsive and includes features such as captcha to prevent fraudulent submissions, SMTP for emails, Mailchimp integration, Stripe and PayPal payments, Google Analytics, webhooks, and the ability to export form submissions in an excel sheet. After form submission, users can customize the redirect URL.