"Add dinner with Luis on Thursday at 9 at Casa Lucio"
Creates the event in your Calendar, geocodes the place and sets the alert you ask for. If the phone's calendar will not accept writes, it uses your Google Calendar.
Diary
AI calendar and voice reminders for iPhone
This is not a list inside another app: Nia writes into the iPhone's own Calendar and Reminders, and what it creates shows up in Apple's apps as if you had put it there yourself.
Calendar
A complete event, in one sentence
"Add dinner with Luis on Thursday at 9 at Casa Lucio and warn me an hour before"
- The place is geocoded, so the event knows where it is and the map shows up on the card.
- The alert lives inside the event, not as a separate reminder that then hangs around.
- Your Google Calendar counts: Nia reads both diaries as one, without duplicates, and tells you which sources it could read.
- Moving one is another sentence: "push the 10 o'clock meeting to Thursday" keeps the duration.
Everything EventKit allows, and nothing more
With a time, with an alarm
A reminder with a time always carries its alarm. Measured: a due date with no alarm notifies nobody, so Nia never leaves one without it.
No time, no promise
A reminder for a loose day gets no invented midnight alarm: it appears with that day's reminders, and Nia says so instead of promising you an alert.
On arriving or leaving
"Remind me to buy milk when I leave work". The "always" location permission is asked for right there, the first time, and never at sign up.
Real repeats
Daily, weekly by day, monthly by date, yearly or every n. And a repeating one does not close when you tick it: it rolls to the next date, and Nia says so.
Your real lists
Work, Home, Groceries: the ones you already have in Reminders. Nia reads them and writes into the one you name.
Undo
Creating, changing, completing and deleting all have an undo button on the card. Delete and undo writes it back, with a new identifier.
Alarms
Alarms and timers that ring on silent
Nia uses AlarmKit, the framework Apple opened for this, so its alarms ring even with the phone on silent or a Focus mode on, just like the ones in Clock.
- "Set an alarm for quarter past seven"
- "Ten minute timer"
- "What alarms do I have set?"
- "Cancel the seven o'clock alarm"
The 14 diary actions
"What have I got tomorrow?"
Reads the iPhone Calendar and your Google Calendar as a single calendar, with no duplicates, and tells you which sources it could read and which it could not.
"Move the 10 o'clock meeting to 12"
Moves the event wherever it is, keeping its length.
"Remind me to buy milk when I leave the house"
Creates the reminder with day, time, repeat, notes, link, priority, list, or on arriving at or leaving a place. A time always carries an alarm; a day with no time gets no alarm invented for it.
"Which reminders are overdue?"
Today, tomorrow, this week, overdue, undated, completed or all of them, with the real lists from your phone.
"Change the dentist one to five o'clock"
Time, day, text, notes, link, priority, list and repeat. The alarm moves with the time.
"Mark the pharmacy one as done"
Closes it. If it repeats it does not close: it moves on to the next date and Nia tells you so.
"Delete the reminder for the service"
Deletes it, and undo writes it back.
"Set an alarm for seven"
Creates the alarm with AlarmKit: it rings on silent and with a Focus mode on.
"Ten minute timer"
A countdown with AlarmKit.
"What alarms have I got set?"
Lists the alarms and the timers that are running.
"Take off the seven o'clock alarm"
Cancels the alarm or the timer.
"How is my day looking?"
Your calendar, the weather, how long it takes you to get to the first thing, your contacts' birthdays and what is sitting in the Gmail inbox.
"Every day at eight, tell me about my day"
A routine with a trigger of time, of place or of a system event, and any Nia action behind it.
Questions
About the calendar and reminders
What is Nia?
Nia is an AI voice assistant for iPhone. You speak to it or type to it in plain language and it actually does things on your phone: create events in Calendar, set reminders and alarms, find places, generate images, read your Gmail, turn the lights on or leave you a WhatsApp message written and ready. It is not a chat that explains how to do it: it is an assistant that does it.
How is Nia different from Siri?
Siri is the system assistant and it wins at something no app can match: it listens with the iPhone locked and the app closed, because it runs on a coprocessor no third party app can reach. With Siri AI, which arrived with iOS 27, it also understands long sentences, chains actions and searches the web, for now in beta, in six languages, on iPhone 15 Pro or later and outside the European Union. Nia does that in 19 languages, on any iPhone with iOS 18 and in the EU too, and on Plus and Pro it remembers what you tell it and answers about your PDFs. And when it cannot do something, it says so.
Does Nia work with Google Calendar and Gmail?
Yes, on the Plus plan. You connect the account in Settings, under Integrations, and Nia reads your Google Calendar alongside the iPhone calendar as a single diary with no duplicates, summarizes your Gmail inbox, sends real emails and searches Google Drive by name and by content.
Can I undo what Nia does?
Almost all of it. The result card carries an undo button when the action can be undone: an event created, a reminder, an alarm, a routine, something you have just saved. When it cannot, as with an email already sent or a photo deleted, the card does not offer a button that would be lying.
Can Nia do things on its own, without me there?
Partly, on the Plus plan. A routine fires at a given time or when you arrive somewhere: an alert reaches you and the action runs when you tap it. What would run on its own on the server, the jobs, is not switched on yet.
Shall we begin?
Download Nia, tell it the first thing and see what happens. The free plan asks for no card.
Free to start. Requires iOS 18. In 19 languages.
Last reviewed