Your customers can place orders from their phone using the Android or iPhone mobile app.
To give your customers access to the mobile app, go to Customers on top of the order panel, select the customer you want to give access to, and click the Get Customers Online button on the top right corner.
In the window that appears, click on the Mobile Apps tab on top. Confirm the customer's email address is correct, and click the Send button on the bottom to send the customer an email with the download link and their login information.
The customer will get an email and they can download the app from the link and log in using the login credentials in the email.