Spark Mail UI design & app screens

Spark is an email client from Readdle that brings smart inbox triage, scheduling, and team collaboration features to personal and work email across platforms.

The app is known for its Smart Inbox grouping, swipe actions, snooze, send-later, and shared drafts. A clean, customizable interface with thoughtful gestures defines it. It's a reference for email-client UX, inbox organization, and collaborative communication features.