A better home for your communication

One app.Your server.No one in the middle.

Keryx brings mail, calendars, contacts, and tasks into one thoughtful Android app. It connects directly to the services you choose, without advertising.

Version 1.0 is on Google Play now.
Your own accounts connect directly to their providers; an optional synthetic demo is hosted separately.

Get it onGoogle Play

Free · Premium $19.99 once

What Premium adds

Keryx Mail inbox with search, messages, and tabs for mail, calendar, contacts, and tasks

Features

Mail, calendar, contacts, and tasks. Together.

Mail

Focused inboxes, strong search, useful bulk actions, reliable attachments, and a reader that protects your privacy by default.

Calendar

Events, attendees, reminders, attachments, and practical day-to-day planning without leaving the app.

Contacts

Server address books remain the source of truth, with an optional bridge to Android Contacts when you want it.

Tasks

JMAP and DAV tasks alongside the messages and events they belong with, rather than hidden in another silo.

Product showcase

A closer look at Keryx.

A closer look at everyday email, your calendar, and a conversation in context.

The Keryx inbox with a search bar and mail, calendar, contacts, and tasks navigation — **Inbox**Focused, flexible, and private by default.

Keryx Calendar in month view, with the day's events underneath — **Calendar**Your time, at a glance.

Keryx on an unfolded foldable, with the inbox beside an open message — **List and message**Everything in one place.

View message attachments and tasks

An open Keryx email with its attachment and formatted message body — **A message, attachments and all**

Keryx tasks on a foldable, showing a task list beside its due date and priority — **Tasks, with the detail pane open**

Pricing

The whole app is free.
Premium is for the power user.

Free

Keryx Mail

Free on Google Play.

One account, all four tools, nothing time-limited and nothing watermarked.

Free features include:

One active account with mail, calendar, contacts and tasks
JMAP, or IMAP and SMTP with CalDAV and CardDAV added on, plus read-only ICS feeds
Read, search, organise, compose formatted mail, reply and forward
Archive, delete, move, junk, tag and unsubscribe, one message at a time
Inline previews for images, PDFs, HTML, text, CSV, Office files, email and ZIP attachments
Events, invitations, and event and task reminders
Push on compatible JMAP and IMAP accounts, periodic sync, manual refresh
Light, dark and OLED appearance, phone and foldable layouts, a mail widget
Remote-image controls, backup and restore, cache controls, account removal

No ads, no analytics, no Keryx account.

Premium

Keryx Premium

$19.99 one time.

One permanent unlock through Google Play, tied to your Google account, not to a phone. No subscription.

Premium features include:

Additional accounts and a unified inbox
Scheduled send, snooze and advanced notification controls
Sending identities, signatures, templates and snippets
Follow-up reminders, saved searches, smart folders and private message notes
Turn an email into a linked task or a calendar event
Browse attachments across accounts, manage mailing-list subscriptions
Bridge provider contacts and calendars into Android Contacts and Calendar
Custom gestures, advanced appearance, launcher icons, the full widget collection
Vacation responder on services that support it
Today: current events, due tasks, waiting replies and returning snoozes in one view
Manual quick actions with retry and Undo
Work and Personal profiles with quiet hours and theme overrides

Purchases are handled by Google Play. Keryx never sees your payment details.
Refund policy

JMAP first

A modern protocol,
with standards-ready fallback.

Keryx is designed around JMAP, where mail, contacts, calendars, and tasks can live on one server. It also supports IMAP and SMTP for mail, plus CalDAV and CardDAV for existing providers and self-hosted systems.

Privacy

Private by architecture.

Your data does not need another cloud. Keryx connects your phone directly to your configured server. Remote images are blocked by default, credentials are protected with Android Keystore-backed encryption, and the app has no advertising SDK. Google Play Billing may process purchase-related diagnostics; the privacy policy explains this and the optional hosted demo.

Read the privacy policy