An email client is a software application that runs on personal computers, smartphones, and tablets.
In terms of : Software application, An email client is a type of computer software that is specifically designed to handle email messages. It allows users to send, receive, read, and manage their emails.
So, in terms of Personal computers, smartphones, and tablets, Email clients can run on a variety of devices, including personal computers (PCs), smartphones, and tablets. This means that people can access their email virtually anywhere, regardless of the device they are using