Molto is the best application with the best UI available over the App Store to configure your GMail application. The reason is that it has the unique feature of merging your contact Display Pictures with that of their Facebook profile which really gives the relishing look to the Inbox. We will talk about the features of that application in detail but apart from that you will not see any other technical feature which is new.
Mostly all the features are available in the default application of GMail but usually the images used by the people for their profile are not updated as frequently as compared with their Facebook profile. Moreover the type of animations this application provides is pretty good.
One swiping towards the right it will archive the mail and then on swiping it towards the left it will display the inbox in the editing mode and then you can select the multiple number of mail to give them a common command. These types of features are usually useful when you are checking your phone after a long period of time and a huge bunch of non-sense mail have logged in the inbox.
You can tap on the logo of the e-mail sender which will display the multiple usual options for the mail and then once you open it you will see the cover photo of the Facebook profile at the top of the mail followed by its content. Again once you open the mail you will have more options which will also include printing the mail.
In the Settings section you can disable the Facebook configuration mode, if you want any merging of info on Facebook with your GMail account but actually nothing is being with your data on GMail account rather Molto is just using that information to make the UI of the application more interactive than the default GMail account. Please let us know if you face any problem while using this application.