# relaymail app — gpg e-mail smart card

> gpg e-mail smart card (iPhone/iPad app by carlos prieto ortiz.)

- Source: https://appshunter.io/ios/app/relaymail-app/id6765924056 (this page in markdown: same URL + `.md`)
- Developer: [carlos prieto ortiz](https://appshunter.io/developer/1889995023)
- Category: Productivity
- Price: $4.99
- Age rating: 4+
- Requires: iOS 18.2 · 11 MB
- Languages: Spanish
- Released: 2026-05-05
- Data updated: 2026-05-17
- User reviews in markdown: https://appshunter.io/ios/app/relaymail-app/id6765924056/reviews.md

## What is relaymail app?

relaymail keeps your OpenPGP private key where it belongs: on your
  YubiKey. Tap to decrypt encrypted mail or sign outgoing messages —
  your secret key never touches the phone.
  WHY HARDWARE-BACKED?
  Most "PGP for mobile" apps either don't decrypt at all, or copy your
  private key onto the device. relaymail does neither. Every private-key
  operation runs on the YubiKey itself: the app hands the ECDH (cv25519)
  or RSA decryption to the card, which does the math and returns the
  session key. Signing — Ed25519 or RSA — is also performed on-card.
  Without the YubiKey in your hand, encrypted mail stays sealed and
  signed mail can't be forged in your name.
  KEY FEATURES
    Decrypt and sign on the YubiKey: ECDH cv25519 + RSA for decryption,
      Ed25519 + RSA for signing
    Send encrypted and signed mail using your recipients' public keys
    View and preview attachments — PDF, images, plain text, Office
      formats and more, with the iOS share sheet for save-to-Files
      and open-in-other-app
    Paperclip indicator in the inbox so you can spot mail with
      attachments at a glance
    Multiple accounts in one app, plus a unified inbox across them
    Auto-configuration for iCloud, Gmail, Microsoft, Yahoo and Fastmail
    Microsoft 365 and Outlook.com accounts sign in with OAuth2 — no
      app password needed
    Web Key Directory (WKD) lookup to find recipients' public keys
      automatically
    Auto-import of public-key attachments from incoming mail
    Reply, Reply All and Forward with proper threading headers
      (In-Reply-To / References) and quoted-original formatting
    Swipe to mark read/unread, flag, archive, move to junk, or
      delete — like the system Mail app
    iCloud sync of accounts and imported public keys across your
      devices, end-to-end through your private CloudKit container
    Background fetch with new-mail notifications and an unread badge
      on the icon
    Address autocomplete from your iPhone contacts
    Available in English and Spanish
  WHAT YOU NEED
    iPhone with NFC (iPhone 7 or newer), or iPad with USB-C
    A YubiKey 5 NFC for iPhone, or a YubiKey 5C / 5C NFC for iPad,
      with the OpenPGP applet provisioned
    Email account credentials — iCloud, Gmail, Yahoo and Fastmail use
      app-specific passwords; Microsoft accounts sign in via OAuth2
  PRIVACY
    Your private key never leaves the YubiKey. Period.
    Public keys are stored locally on your device and (optionally)
      mirrored to your private CloudKit container so a second device
      sees the same keyring.
    Account passwords are stored in iOS Keychain (synced via iCloud
      Keychain if you have it on).
    Your contacts are read locally for autocomplete and never sent
      anywhere.
    No analytics. No tracking. No third-party servers.
  Built for OpenPGP users who don't want their private key on the phone.


## Version history (last 3 releases)

### 3.4 — 2026-05-14

• Smart Reply & Summarize — generate quick replies and bullet summaries with Apple Intelligence, all on-device.
  • Local drafts — save unfinished messages with one tap; cancel a compose with changes and choose Save Draft. Drafts live only on this device, never on the
  server.
  • Load remote images on demand — block trackers by default, tap "Load" per message or "Always for this sender" to remember.
  • Writing Tools & Genmoji in compose — rewrite, proofread, summarize selections and insert Genmoji.
  • Requires iOS 18.2. Apple Intelligence features require a supported device on iOS 26

### 3.0 — 2026-05-06

• Microsoft accounts (Outlook, Hotmail, Live) via OAuth2
  • Full iPad support, including YubiKey over USB-C
  • iCloud sync for accounts and keys across your devices
  • RSA message decryption, alongside the existing cv25519

### 2.0 — 2026-05-05

No release notes.

## More apps by carlos prieto ortiz

- [DR Mobile - MPD Remote](https://appshunter.io/ios/app/dr-mobile/id6761500595)
- [OBIScanner](https://appshunter.io/ios/app/obiscanner/id6761660069)
- [drobimobile](https://appshunter.io/ios/app/drobimobile/id6761784122)
- [drtagger](https://appshunter.io/ios/app/drtagger/id6762052723)
- [IOSTerm](https://appshunter.io/ios/app/iosterm/id6762598746)
- [Zplayer music player](https://appshunter.io/ios/app/zplayer-music-player/id6763948150)

All apps by carlos prieto ortiz: https://appshunter.io/developer/1889995023

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-17.*