Amazing Marvin vs Open Sunsama

Amazing Marvin is a personal productivity app for organizing tasks and planning work. It supports recurring tasks, time estimates, color coding, focus sessions, time blocking, workload planning, and review reports. Users can choose Day Planning, List-Based, Spontaneous, or GTD workflows, and adjust more than 300 settings, layouts, themes, colors, and feature controls. Calendar sync is available, and imports are supported from Todoist, TickTick, Asana, ClickUp, and Google Calendar. The app runs on the web, Windows, macOS, Linux, iOS, and Android. Marvin Pro starts at $8 per month; annual billing costs $96 per year and saves 33%. The 14-day trial provides full access without a credit card, but after the trial users cannot add or complete tasks until subscribing. Support includes personal email contact, and community channels include Facebook Group, Discord, and Reddit. Users can cancel through settings at any time.

Open Sunsama is a task manager and daily planner built around a board of days and calendar time blocking. Move tasks from a backlog to a daily board; unfinished work rolls over to tomorrow. Focus mode times a task and tracks actual time against its estimate. It syncs Google Calendar, Outlook, and iCloud, with support for multiple accounts. Time blocks stay in Open Sunsama rather than being copied to Google or Outlook calendars. Its hosted MCP server connects to Claude, ChatGPT, Cursor, and other MCP clients through OAuth and provides 24 tools. The REST API covers tasks, subtasks, and time blocks, with selectable API-key scopes. Users can also self-host the web app, API, MCP server, and PostgreSQL database using Docker Compose. The free plan costs nothing for personal use. The non-commercial license limits production use by companies, and there is no one-click export button. Desktop apps are available for Mac, Windows, and Linux; phones use the mobile web app, as no native phone app is available yet.