iPhone: Spark is well on its way to becoming the next best email client for iOS and today it gets a few handy new features pulled right out the playbook for the now-defunct Mailbox. The update allows you to customise various snooze options and adds in a better attachment screen. The new snooze options are easily the big feature here. You can now customise snooze times, including snoozing emails for a specific day and time. You can also set it up so you'll get a notification when the email's moved back into your inbox (or not). The update also adds in a new image attachment option that makes it easier to pull a photo directly from your camera roll as well as better linking to files located on Dropbox, Google Drive, or OneDrive.
Spark (Free) [iTunes App Store]