I built a visual timeboxing app because I could not find one that worked for me (SlothBox)

I have been doing timeboxing for a while now and it genuinely changed how I work. The idea is simple: commit a fixed window of time to a task, then stop when it ends. But every tool I tried had the same problems.

Timer apps just count down. They do not help you plan the day. Full schedulers like Motion or Reclaim automate everything and take the decisions away from you. I did not want that. Spreadsheets were too fiddly. I just wanted to see my whole day visually, drag tasks into open slots, and plan around my actual calendar meetings without the app making choices for me.

So I spent a few months building SlothBox: https://slothbox.io

The idea is pretty simple. You have a task sidebar and a daily schedule grid that shows your Google Calendar events. You drag tasks into time blocks, assign priority levels, and toggle a focus mode for blocks you really need to concentrate on. No automation, no AI doing the planning. Just a clear view of what your day looks like before it starts.

It is free and in beta right now. There is a demo at the link with no login needed if you want to poke around.

Would love to hear from anyone who has tried timeboxing before and bounced off other tools. Curious what the sticking point was.