Inbox Hero
Built for iPhone Duo
The email app built for iPhone Duo.
Inbox on one screen, the open email and a reply in your voice on the other. Scams and newsletters are filed before you see them.
Free for 14 days, no card. Then 27ยข a day ($99 a year). Gmail access reviewed and approved by Google after an independent security assessment.
Not sure about one email right now? Check one suspicious email free, no sign-up.
Folded, unfolded, sideways
What changes on the Duo
Inbox and navigation on one side, the email you're reading and your reply on the other. Nothing jumps back and forth.
Drag an email across to the reply side and Inbox Hero drafts the reply there in your voice. Edit it or send it. Nothing sends until you tap.
Cycle the text size between 100, 90 and 80% on each device, so a whole thread fits when you hold it sideways.
Phishing and payment-change scams are quarantined, never deleted, on Gmail, iCloud, Yahoo and other email. On Gmail, AI-written cold pitches get their own folder.
Get it on your iPhone Duo
Sign in first, then add it to your Home Screen in Safari.
- Sign in with Google, or with a code for iCloud, Yahoo and other email. It's free for 14 days, no card.
- In Safari, tap Share, then Add to Home Screen.
- Open Inbox Hero from your home screen and unfold the Duo: two panes turn on by themselves.
The iPhone app is in beta on TestFlight, not on the App Store yet. Inbox Hero also works on any iPhone, iPad, Android foldable, Mac or PC, and keeps working inside the email app you already use.
Questions
What is the best email app for iPhone Duo?
One that uses both screens: your inbox on one side and the open email with a reply on the other. Inbox Hero switches to two panes by itself when you unfold the Duo, drafts replies in your voice and quarantines scams. It is free for 14 days, no card needed.
Does Inbox Hero work on the folded iPhone Duo?
Yes. Folded, your inbox fits the outer screen with every action one tap away. Unfold it and the two-pane layout turns on by itself.
How do I install Inbox Hero on iPhone Duo?
Sign in on joininboxhero.com, then in Safari tap Share and Add to Home Screen. The iPhone app is in beta on TestFlight; it is not on the App Store yet.
Which email accounts work?
Gmail and Google Workspace, plus iCloud, Yahoo, AOL and other IMAP email. Some features, like the AI Outreach folder, are Gmail-only for now.