This one's a keeper, take it from me. I've held on to it for a pretty long time and use it every day. And now it's got a calendar as well!
From the Developer:
Why Astro 🚀
• Modern, intelligent features for FREE: Snooze, Unsubscribe, Send Later, Email Tracker, Priority Inbox, Unified Inbox, Calendar, and more, for Gmail and Office 365 email accounts
• Astrobot: AI-powered email assistant that highlights important messages and questions, unsubscribes you from emails, and responds to hundreds of commands to help you stay on top of your mailbox and calendar
• Priority Inbox: Know which emails are most important with a focused inbox, powered by AI
• Calendar: View and manage your calendar directly from the Astro app, including an Agenda view with events for Snoozed emails, scheduled emails and reminders
• Slack Integration: Easily work across Slack and email. In Slack, read and respond to emails, and create Calendar events. In Astro, search for Slack messages and share emails to Slack channels
• Astrobot Voice & Amazon Alexa Skill: Read, manage, and reply to emails hands-free by talking to Astrobot, directly from the Astro app or from your Amazon Echo
AI-Powered Email Assistant 🤖
• Ask Astrobot: Responds to hundreds of natural language commands to manage, clean up, and search your inbox, add events to your calendar, set reminders, and learn how to use Astro
• Insights: Unsubscribe and archive suggestions for messages that can skip your mailbox
• Reminders: Automated reminders to follow up on important emails, questions, tracked emails, time-specific requests, and @mentions from other Astro users
• VIPs: AI-powered contact list management, so you always know when a priority email arrives
• Voice Commands: Manage your inbox by talking to Astrobot directly from the app
• Daily & Weekly Update Emails: Insights that help you clean up your mailbox and make it easier to know what to follow up on
Smart Inbox Management 📥
• Priority & Other Inbox: Astro sorts your emails using artificial intelligence
• Smart Notifications: Eliminate distractions by getting notified only when an email is important
• Snooze: Swipe to read or respond to an email at a specific time, or when you get back to your Mac
• Email Open & Reply Tracking: Get notified when a recipient opens an email or get a reminder if you haven’t heard back on time
• Send Later: Schedule your emails to be sent at exactly the right time
Calendar 📅
• Unified Inbox & Calendar: Streamline your workflow and save time by viewing and managing your Gmail and Office 365 email accounts and calendars all in one place
• Calendar Assistant: Add simple events using natural language
• Complete View of Today’s To-Dos: Calendar includes events not only from Gmail and/or Office 365 email accounts, but also Snoozed or scheduled emails and reminders, so you get a complete view of your day
• Customizable Calendar Views: Choose which calendars and email accounts to display
Additional Features 🌐
• Customizable swipes
• Fast search
• Folders and Favorites
• Email aliases
• Signatures
• Attachments - Dropbox, Box, Google Drive, Quip, iCloud
• Rich text and emojis
• Support for Gmail and Microsoft Office 365
Get it here!