Tiimo is one of the few focus apps that commits to single-tasking at the scheduling layer — not as a mode you opt into, but as the default shape of the day. You put one thing in a time block. That’s what’s on the screen. The rest is in the plan, not in your face.
What’s worth studying is the trade-off that commitment implies. Tiimo picks the when for you, which means it’s deciding in advance. GTD, by contrast, keeps the decision of what next open until the moment of doing — you triage, but you don’t schedule, because the right task depends on the context you’re in when you sit down.
Both are defensible. Scheduling wins on friction and follow-through. Open choice wins on fit. The honest question isn’t which is right. It’s where you want the decision to happen: in advance, when you have perspective, or in the moment, when you have information. Most people assume one and need the other.
A calm app doesn’t force the answer. It makes the choice visible and lets you move it.