Free AI Day Planner: Plan Your Day from One Sentence

What "free AI planner" realistically means

Most polished AI planners are paid subscriptions. But a day plan is a small job for a language model, so you can assemble a very cheap or free version yourself:

• A free or low-cost task app to hold your tasks.
• An AI model you control: a local model (free to run) or a small cloud model on your own key with a spending cap.

This article shows a workflow with DonDon, whose AI runs on your own key or a local model. DonDon is free to start; time blocking is a Premium feature.

The one-sentence plan

The idea: describe your day in one messy sentence and let the AI structure it.

Input (quick-add with AI):

"Tomorrow: dentist 9am, finish quarterly report (about 3 hours), call Sam, buy gift for Mia, gym in the evening, and I focus best in the morning."

Output you review: a set of draft tasks with dates and durations, such as:

Task	When	Length
Dentist	09:00	60 min
Finish quarterly report	Afternoon block	180 min
Call Sam	After lunch	15 min
Buy gift for Mia	Evening errand	30 min
Gym	18:30	60 min

You then edit (the model may misjudge durations) and save.

Step by step in DonDon

1. Turn on AI. In Settings, choose a provider: Claude, OpenAI or Gemini with your key, or an OpenAI-compatible endpoint such as a local Ollama model. AI is off by default. See BYOK explained and local AI with Ollama.
2. Quick-add the sentence. DonDon shows draft tasks first so you can refine them before anything is saved.
3. Break down big tasks (like the quarterly report) into steps.
4. Place them in time blocks (calendar, Premium). You can ask the model to propose a schedule, then drag to adjust.
5. Start a focus session with the Pomodoro timer.

Without AI, quick-add still parses natural-language dates and tags for free; for example Call Sam tomorrow 2pm #personal.

Keeping cost near zero

• Use a small model for quick-add and breakdown.
• Set a monthly spend limit with your provider.
• Run local when privacy or cost matters most.
• Plan once a day. Do not re-plan on every change.

What this does not do

• It does not re-plan continuously in the background like Motion; see Motion alternatives.
• AI can misjudge durations or dates, so review everything.
• Calendar time blocking is Premium; tasks, quick-add and habits remain free.

Prompts if you prefer a chat window

See plan your day with Claude or ChatGPT for copy-paste prompts.

Writing a good one-sentence plan

The quality of the plan depends on the quality of the input. A good sentence includes:

• What you need to do, in your own words.
• When anything is fixed ("dentist 9am").
• How long big things take, even roughly.
• Constraints such as when you focus best or when you must leave.

Compare:

"Lots to do tomorrow."

with:

"Tomorrow: dentist at 9, then deep work on the report (3 hours, I focus best before noon), lunch with Sam at 1, errands after 4, gym at 6."

The second gives the model what it needs, and gives you a plan you can follow.

What the model might get wrong

Expect to correct a few things:

• Durations. Models underestimate writing, admin and travel.
• Dates. Phrases like "end of the month" or "next Friday" can be misread.
• Order. A sensible schedule respects energy; a naive one does not.
• Missing items. Check that every task you mentioned appears.

Review the draft before you save. A thirty-second check prevents a day of confusion.

A cheap and private setup

If cost or privacy matters, there are three levels:

1. Free, local. Run a small model on your computer with Ollama. No per-request cost, nothing sent to a cloud provider. See local AI to-do app with Ollama.
2. Very cheap, cloud. Use a small, fast cloud model with a monthly spending cap on your own key. Typical planning uses a small number of tokens.
3. Stronger, occasional. Use a bigger model only for a weekly plan or a complicated week.

You can switch between these in settings at any time.

Use it on a real day

A short script for tomorrow morning:

1. Open your planner and type the one-sentence plan into quick-add.
2. Review the drafts. Fix durations and times.
3. Pick the top three and mark them.
4. Place them in time blocks if you have the calendar.
5. Start the first focus session.
6. At 5pm, spend two minutes marking done and moving the rest.

If the plan helped, repeat. If you stopped using it after two days, make the sentence shorter or skip AI and use plain quick-add.

Free vs paid, plainly

	Free path	Paid path
Task app	DonDon Free (3 lists, 1 habit, quick-add, Pomodoro)	DonDon Premium for calendar and more
AI	Local model or a small capped cloud model	Stronger cloud model
Planning	Quick-add and manual blocking	AI-proposed blocks on the calendar
Cost	Close to zero	$1.99/month or $11.99/year plus any AI usage

None of this is a promise that AI planning will transform your day. It is a cheap way to find out.

Related reading

• Prompts for chat models: plan your day with Claude or ChatGPT.
• Comparing paid planners: best AI daily planner apps.
• The method behind time blocks: time blocking guide.

Start

Create a free account via the platforms page and compare plans on pricing.

Frequently asked questions

Is there a completely free AI day planner?

You can get close. Use a free task app, and run AI on a local model (free after you have the hardware) or a small, cheap cloud model with a spending cap on your own key.

What should I tell the AI to plan my day?

Your fixed commitments, your tasks with rough durations, your working hours and when you focus best, then ask what to drop if time runs out.

Does DonDon have a built-in AI planner website?

No. DonDon's AI features live inside the app and run on your own key or a local model; there is no separate web tool.

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