Do you have Gmail? Well did you know that, as well as the email application, you can also view it from the browser of any mobile phone in it's web version?
Gmail is a version that is optimized for touch gestures and simple keyboards: emails appear in a single column that covers the entire width of the screen and you can move around the different sections in a different page or at the bottom of the same page.
Interestingly, as well as writing normally, the Web version of Gmail for smartphones includes an option to draw with your fingers and send the images directly as attachments. An original way to communicate or outline ideas.
Although we don't have the schedule options and filters that the desktop version does, Gmail for mobile browsers amply fulfills its function and is even faster than the application specifically for mobile and tablets.