A few months back I had written about an interesting web app which allowed users to schedule emails in Gmail. The add-on for browsers like Google Chrome and Firefox worked very well and did its job. However, there is another entrant called "Right Inbox" which provides a similar service but is simpler to use.
While Boomerang for Gmail provides much more than just scheduling emails in Gmail, Right Inbox’s only focus lies on scheduling emails in Gmail. Once you install the Right Inbox extension refresh you Gmail page and you will be guided through grant permissions to the app to your Gmail Inbox.
Once you have granted permissions to the Right Inbox app, you will be able to schedule emails in Gmail with the click of a button. Right Inbox will add an additional button to the compose email workflow (as seen above) allowing you to send the email at a later time.
Clicking on the "Send Later" button will give you several options to schedule the email. You can either click on the options provided or choose to send the email at a specific time. Once you have scheduled your email, the email will be stored in your drafts folder and will be delivered at the time you chose. The best part is that you don’t have to be near your computer once you have scheduled your email and Right Inbox will do the work for you.