Notes from the designer4 min read
Void Calendar vs Motion
The week was planned, then Wednesday changed
Void CalendarWhat I want from AI scheduling is fairly simple: when a plan changes, I do not want to rethink the whole week.
Take IELTS preparation. Listening on Monday, speaking on Wednesday, writing on Friday. Then Wednesday gets another class, speaking runs over, and Friday also has an assignment due. The tidy plan needs attention again.
An IELTS example: preserve the working context when the schedule changes. Planning illustration.
In short: If you want a system that fills your calendar by priority and deadline and keeps rescheduling as things change, with team project management and mobile apps, Motion is the more mature choice. If you work on an Apple silicon Mac and want to schedule with your own AI model, keep working steps in task notes, and keep your data on your machine, try Void Calendar.
At a glance
| Void Calendar | Motion | |
|---|---|---|
| Platforms | macOS (Apple silicon), public beta | Web, desktop, iOS, Android |
| Price | Free with every feature; Pro sync not on sale yet | No free plan; per-seat monthly or annual, free trial |
| AI scheduling | Your own model and API key; fits tasks into free time | Auto-schedules by priority and deadline, then reschedules |
| Calendar connections | Apple Calendar and Reminders, Google, iCloud; Outlook planned | Google, Outlook, iCloud |
| Tasks & notes | Every task has a note with [[ ]] links | Tasks, projects, and AI docs and notes |
| Where data lives | On your Mac; no company cloud copy | Your Motion cloud account |
Competitor details checked October 8, 2026; see their official sites. Void Calendar is in public beta.
Motion takes rescheduling seriously
Motion schedules tasks around working hours, duration, priority, and deadlines, then reschedules when the calendar changes. Its value is easy to understand if you want the system to maintain those rules. See Motion auto-scheduling.
A usable schedule also needs clear tasks. Does “practice speaking” mean ten minutes of shadowing or a full mock test? Without that detail, I still have to work out how to start.
I want AI to see more than time
Void Calendar brings task context into planning. Each task has a corresponding note for the steps, materials, and difficulties from last time.
A speaking session could focus on Part 2: review previous feedback, do two timed attempts, and record expressions you could not produce. AI can break that down and reserve time. Those records can help the next planning session too.
You can also choose an installed AI client such as Claude Code or Codex, or connect a custom API. Keep the AI you are comfortable with.
Free time and available energy are different
After three morning classes, the calendar might still have two free hours. Whether those hours suit a full mock exam is another question.
When reviewing a plan, I look for room to breathe, smaller steps, and a way to restart after an interruption. Time boxes, notes, and scheduling preferences in Void Calendar serve that practical need.
Which one fits
Choose Motion if:
- You want the system to fill your calendar by priority and deadline and keep rescheduling as plans change.
- You need team project management or mobile apps today.
- You are happy to pay per seat for a hosted AI service.
Choose Void Calendar if:
- You use an Apple silicon Mac and want to review a plan before AI touches existing events.
- You want to use your own model and API key, with requests going straight from your Mac.
- You want a note with every task and focus records written back to the time box.
Look closely at Motion if routine rescheduling is the main burden. Explore Void Calendar if you also want working instructions, records, and your chosen AI together.
Read about moving interrupted time boxes.
Sources checked October 8, 2026: Motion pricing, Motion auto-scheduling, and Motion calendar connections.