Inky is an alternative inbox organizer, and the main strength of the app is the option to use hashtags to emails. It might sound like an odd idea, but by personalizing emails in this way, you have more control over how you can organize your work life. For example, you can tag messages from colleagues to land in a particular inbox, while other attributes -- such as unread or attachment -- can also be used when you search for a particular message.
The app is free for Gmail, iCloud and Outlook accounts, but you will have to upgrade for Microsoft Exchange, Office 365, Google Apps and other IMAP-based email accounts.
Alternatively, give Google Inbox for Android a whirl.
Price: $Free trial | Subscription
Operating system: iOS
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