HeyDevis is estimate management software that streamlines the quotation workflow from creation to payment. Professionals generate detailed estimates on mobile devices with automatic calculations, eliminating spreadsheets. Clients access estimates via secure links on smartphones without creating accounts or downloading apps. Electronic signatures comply with European eIDAS regulations, ensuring legal validity with cryptographic timestamping. The platform includes a service catalog with preset pricing, a client directory for follow-ups, and email reminders to track estimate status. Payments are processed via bank transfers or cards through Stripe or Bancontact, with funds sent directly to business accounts. Banking fees apply for card payments, while transfers are free. HeyDevis ensures accounting compliance with mandatory business and tax fields, offering exports in formats like FEC and Peppol XML. Available in France and Belgium, it applies region-specific tax rules to transactions.