You can have as many iOS, Android, Windows or Mac devices as you need to run your business. An example might be to use a device for a salesperson to invoice orders whilst with a client. Another might be for your bookkeeper to create reports in his office. Each device can have full access and update capability, or restricted abilities depending on the function you assign to them – See FAQ 11 for instructions on how to register and use new devices. Also, see Add other Users, which explains how to share EasyInvoice with colleagues.