Send unlimited invoices to customers with the best free invoice & estimate billing generator tool on Gmail add-ons, Android, iOS, Windows and MacOS. Must have addon for all small businesses. Reply to customers with an invoice, estimate, credit note and more right from Gmail! Sign in with your existing Bookipi, or Invoice bee login details. Your data from mobile app will sync instantly. 1. Receiving Client’s signature: Request your clients to sign the invoice. 2. Option for customer to pay you via credit card and impose surcharge: You can choose to impose a credit card surcharge to your clients. 3. Active app support and rich tutorial content support: We promptly reply within 12 hours of all enquiries. 4. Cloud accounting solution: All your invoicing data is backed up on the cloud. Terms of Service: https://bookipi.com/terms-of-service Privacy Policy: https://bookipi.com/privacy-policy