Recommended clients

Apps

One pick per job. Everything speaks an open standard, so nothing here locks you in — swap any client and your data stays put in your core.

Mail

Mailtemi

iOS · Android · macOS · Windows

MailCalendar soon

A modern JMAP email client — the recommended pick for mail. Full folders, threads, search, and push; calendaring is on the way.

Get it →Set it up →

bullmoose CLI

macOS · Linux · terminal

MailContactsCalendar

The one-binary power-user client: send, live-watch, search, offline sync to local SQLite, and token/grant admin.

Get it →Set it up →

Calendar & contacts

Apple Calendar & Contacts

macOS · iOS

CalendarContacts

Built in — sync over CalDAV/CardDAV against the same core your agents read. Recurring events expand correctly across DST.

Set it up →

DAVx5

Android

CalendarContacts

The standard open-source CalDAV/CardDAV sync app for Android. (Step-by-step guide coming soon.)

Get it →Set it up →

Legacy mail — POP3 / SMTP

Any POP3/SMTP client works through the popcorn shim — the one non-serverless piece. $0 on a homelab box reached over Tailscale, or ~$5/mo on a small VPS. For full fidelity, prefer a JMAP client above.

Apple Mail · Outlook · Thunderbird

macOS · Windows · Linux · iOS

Mail

Download-style mail for clients that don't speak JMAP — one inbox, no push. Point them at popcorn's POP3S/SMTPS.

Get it →Set it up →