iPhone and web sync
Add a task on your phone and pick it up on your computer. Your data matches everywhere.
Say it once.Your whole day, sorted.
OneDay keeps appointments and tasks in one day. Say several things in one go. AI splits them into items, gives each a short title, adds notes, and lets you review before anything is saved.
Use it on the web today · iPhone app in TestFlight beta
Try it
Say it the way you think it. No need to tidy it up.
Pick an example below and see what OneDay makes of a single sentence.
Every change is shown for review first. Nothing is saved until you confirm.
What’s on tomorrow?Move the 2 PM meeting to FridayBuy milk, eggs and coffeeSent the quotationMonday 9 AM, sync with the sales teamCancel tonight’s haircutWhen am I free this week?Call the AC technician, it’s leaking
How it works
Three steps From thought to schedule
No forms to fill field by field. No picking dates from a calendar.
Speak or type
Tap the mic and say everything on your mind. Several things in one sentence is fine.
AI sorts it
Claude splits it into appointments and tasks, gives each a short title, sets the date and time, and keeps the details in notes.
You confirm
Every item lands on a review screen. Edit or remove anything, then tap save.
Everything in place on Today
Appointments in time order, tasks in the day’s list. Open the app and see your whole day on one screen.
Today
Appointments are times. Tasks are things to finish.
OneDay keeps the two clearly apart, then puts them side by side on one screen. Open the app and know where you need to be today, and what you need to get done.
- Appointments in time order, by day, week and month
- Tasks with due dates, priority, subtasks, tags and repeats
- A To-do view of all tasks, grouped by due date
AI assistant
Edit your schedule by voice, like telling an assistant.
It’s not just for adding items. Reschedule, delete, or say what’s done. OneDay finds the matching items and shows a summary of the changes first.
- Move appointments to a new day or time
- Close several finished tasks at once
- Delete items you no longer need
Just ask
Ask about your schedule, and hear the answer.
Want to know what’s on tomorrow, or how many tasks are still open this week? Just ask. OneDay answers from your own data and reads it aloud while you drive or commute.
Calendar
One calendar. Every appointment.
Switch between day, week and month on the iPhone app. Two-way sync with Google Calendar through the calendar accounts on your phone: Google events show up in OneDay, and events you create in OneDay go back to Google.
Google Calendar · two-way sync (iPhone)
Meet Dee
Meet Dee, your day buddy.
Dee is the ring from the OneDay logo, with a face and feelings. The ring fills as your day progresses, and the face changes with what’s happening, from wake-up to wind-down.
Good morning! 2 appointments and 4 tasks today
First up10:00
Says good morning and gives a quick overview, so you know how full the day is.
The ring is your day
Finish a task and the ring fills a little more. Clear everything and it turns gold, and your streak grows by a day.
Moods that follow your day
Cheerful in the morning, focused before meetings, startled by overdue tasks, and sleepy at bedtime.
Tap Dee to hear it
In the app, tap Dee and it reads the moment’s message aloud. No need to look at the screen.
iPhone app · TestFlight beta · App Store coming soon
Your day, always on screen.
Dee lives on your Home Screen, Lock Screen and Dynamic Island. See your next appointment, how many minutes are left, and how many tasks remain without opening the app.
Home Screen widget
Tasks left, your streak and the next appointment at a glance. Dee’s face changes with the time of day.
Live Activity on the Lock Screen
A big countdown before your meeting. Dee moves toward the flag as time runs down, and when it’s time, Dee is all smiles, waiting for you.
Dynamic Island
Time left before your appointment sits at the top of the screen. Expand it for details anytime, even while using other apps.
Reminders before appointments, plus a morning summary
On-device alerts before each appointment, plus an overview of your day every morning (rolling out now).
On iPhone, widgets and Live Activities show Dee as a still image that updates its mood and progress throughout the day. The animations on this page just make each state easier to see.
All in one app
Every device, same data.
Email sign-in, no password
Get a code or link by email. One tap and you’re in.
Stats and streaks
See how much you finish each day and keep your streak going.
Recap cards
Turn your stats into a good-looking card and share it right away.
Subtasks, tags and repeats
Break big tasks into small steps, group them with tags, and set routines that come back on their own.
Appointments vs tasks
Why keep them apart
The two work differently, so OneDay handles each one its own way.
| Topic | Appointments | Tasks |
|---|---|---|
| What it is | Something that happens at a time | Something you need to finish |
| Example | Meeting 10:00 · Doctor 15:30 | Write a quotation · Buy a gift |
| Settings | Date, start and end time | Due date, priority, subtasks, tags, repeat |
| Where it lives | Calendar and Today | To-do and Today |
FAQ
Questions? We have answers.
Which devices can I use OneDay on?
Use it on the web right now at onedaytask.com/web. The iPhone app is in TestFlight beta and coming to the App Store soon. In the meantime, tap "Add to Home Screen" in Safari to use the web app like a native app.
Will the AI change my schedule without asking?
No. Whenever AI adds, moves, deletes or completes something, OneDay shows the changes for you to review first. Edit or remove items, and nothing is saved until you confirm.
Does it work with Google Calendar?
Yes, on the iPhone app. Add your Google account in iPhone’s calendar settings, and OneDay will see your Google events and send events created in OneDay back.
How does data sync between phone and web?
Sign in with the same email on both. We send you a code or link by email, no password needed, and your data stays in sync across every device.
How is my data used?
Read all the details in our Privacy Policy
Make tomorrow lighter.
Open OneDay on the web, say what you need to do once, and let your schedule sort itself.