Add many options to MobileMail.app.
With AllMail you can mark as read (or unread), flag (or unflag), delete or move all your mails easily and quickly. You can also hide all your mails and require a password to show them again.
To Use: tap the Edit button while viewing your inbox, a new left-hand button names `All Mail` will be available to access new options.
No icon is added to the homescreen. Configure options from Settings app.