Arcush vs Open Sunsama
Arcush
arcush.comOpen Sunsama
opensunsama.comSide by side
| Figure | Arcush | Open Sunsama |
|---|---|---|
| Price from | $0.83/mo | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | — | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| iOS | Yes | Yes |
| Android | — | Yes |
| API | — | Yes |
| Self-hosted | — | Yes |
| Plans published | 4 | 2 |
| Spec score · Time Blocking Apps | 8.6 (#5) | 8.6 (#7) |
| Spec score · Daily Planner Apps | 8.0 (#83) | 8.8 (#18) |
| Calendar sync | Yes | Yes |
| Focus sessions | Yes | Yes |
| Intended users | The makers describe Arcush as a simple planner for individuals who want to organize schedules without overcomplicated design or features. | The maker describes it as a fit for people who want to plan each day with time blocks and let an AI agent help. |
| Maker | The site says Arcush was created by three Ukrainians and identifies Volodymyr Dudchak in its copyright notice. | The repository identifies Circo as the copyright holder and credits the project as made by Circo. |
| Mobile platforms | ios | both |
| Planning method | time blocking | time blocking |
| Product | Arcush is a minimalistic daily planner for organizing tasks, ideas, and a daily schedule with time blocking. | Open Sunsama is a task manager and daily planner with a board of days and calendar time blocking. |
| Recurring tasks | Yes | Yes |
Plans
Arcush
- Arcush Pro Monthly$3.99 a month
- FreeFree
- Arcush Pro Yearly$9.99 a year
- Arcush Pro Lifetime$24.99, paid once
In their own words
Arcush
Arcush is an iPhone daily planner built around time blocking. It organizes tasks, ideas, and a day schedule on a timeline, with a calendar view for hour-by-hour planning. The Inbox gives unlimited space for ideas and removes tasks that remain unscheduled. You can add and edit tasks, including recurring tasks with different frequencies. A widget starts task creation, while notifications cover upcoming or overdue tasks. Core task creation and schedule management are available on the Free plan at free. Arcush Pro adds calendar synchronization, calendar time blocking, color customization, and recurring tasks; the monthly plan is $3.99 a month. Pro syncs calendars added in iPhone settings and allows synchronized events to be edited, but cannot create new calendar events. Arcush supports iPhones running iOS 16 or later, not Android or other Apple devices.
Open Sunsama
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.