What is Onin?

Onin is a privacy-first social calendar app, for you and friends. Invite your friends, add events to your calendar, create group calendars, and plan together in the chat.

Onin is designed to help friends, family, and partners plan any event: a coffee date, dinner, party, weekend away, or once in a lifetime road trip. Whilst the app is wonderful with friends, it’s also a private space to schedule things just for you: events, reminders, and to-do’s.

Onin is for your eyes only. We secure your chats, calendar events, and profile with end-to-end encryption. This means that nobody but you can see your private information, not even Onin. We believe privacy is a human right, and will always value privacy above all else.

How do I download the app?

Onin is currently invite-only. We’re controlling the roll out to ensure that everybody has the best possible experience possibly. You can join the waitlist now here.

If you know somebody using the app, they can invite you and give you early-access now.

Please note Onin is currently only available on iOS. We’re working hard to bring the app to Android and Web as soon as possible. Those on the waitlist will be first to hear. Vote for Android here.

Why do you need my phone number?

Onin uses phone numbers to help you easily connect with people in your contacts. We use phone numbers instead of emails as this is simpler for friends and family who rarely communicate by email. Your phone number is only visible to other users that already have it in their contacts and we will never share your phone number to those who don’t.

Is Onin free?

Yes, the app is completely free. We will never compromise your privacy to monetise the app. In the future, we plan on releasing a premium subscription that offers Onin super-fans a premium range of features to make planning their personal and social life even easier.

What is Two-Factor Authentication (2FA)?

Two-Factor Authentication is a required extra layer of protection used to ensure the security of your account, beyond just your phone number. You can add an email as a secondary authentication method in Settings. Here’s how:

From your Calendar or Chats tab:

  1. Tap your Profile Photo in the top left of the screen
  2. Tap Privacy & Security
  3. Tap Authentication Methods
  4. Tap Add Email
  5. Enter your email and tap Next
  6. Re-enter your email and tap Done

What is end-to-end encryption (E2EE)?

Privacy is at the heart of Onin, and we will always go the extra mile to keep your data, conversations, and events secure. It’s why we’ve chosen to be end-to-end encrypted from day one. Onin is the most private calendar by default available on the market today.

With end-to-end encryption, your messages, photos, documents, calendar events, profile image, name, and mobile number are kept private. This is because end-to-end encryption ensures that only you can see the contents of your messages and calendar events. All of this happens by default within the app, and you don’t need to do anything to enable this.

How do I invite people?

From the Calendar or Chats tab:

  1. Tap your Profile Photo in the top left of the screen
  2. Tap the blue Invite Friends to Onin
  3. Tap the blue Invite next to the name of the contact you’d like to invite
  4. Send them a text to invite them to Onin

There is currently no limit to how many contacts you can invite. Bring your friends along!


You'll get a notification when they join.

How do I add external calendars?

From the Calendar or Chats tab:

  1. Tap your Profile Photo in the top left of your screen
  2. Tap External Calendars
  3. Tap Allow Access (this allows Onin to see events from your other calendar)
  4. Select the calendars you’d like to see in Onin by tapping the outlined circle next to their name
  5. Tap on the blue Settings back arrow in the top left to return to Settings

How do I add an event to my calendar?

From the Calendar tab:

  1. Tap the blue plus icon in the top right of your screen
  2. Select your participants by tapping the circle next to there name
  3. Or, tap the blue Skip in the top right corner if the event is just for you
  4. Select a Category by tapping on one of the category icons
  5. Tap Title to add a title for your event
  6. Tap Starts to add the date and time your event starts
  7. Tap Ends to add the date and time your event ends
  8. For all-day events, tap the toggle icon to the right of All-Day
  9. Tap Location to add the location of your event
  10. Select to add the event to an existing chat, or to create a new chat
  11. Tap the blue Add in the top right corner to finish

How do I edit an event in my calendar?

From the Calendar tab:

  1. If not today, tap the date on your calendar
  2. Tap on the event shown below your calendar
  3. To change the title or category, tap the blue Change Title & Category
  4. To change the date or time, tap the arrow next to the current schedule
  5. To change or add a location, tap the arrow next to the current location


You can also make changes to events from inside chats by using Onin's Keyboard Calendar.


From within the chat:

  1. Tap the gray calendar icon below the Message bar to open your Keyboard Calendar
  2. To only see events with the person/people in your chat, tap Shared
  3. Tap on the event you'd like to edit
  4. Follow the steps described above to make changes

How do I create a group calendar?

  1. From the Calendar tab, tap the blue plus icon in the top right
  2. Or, from the Chats tab, tap the blue create chat icon in the top right
  3. Tap New Group Calendar
  4. Select your participants by tapping the circle next to there name
  5. Tap the blue Create in the top right

This has created a new group calendar. To schedule events in your group calendar:

From the Calendar tab:

  1. Tap the blue Plus icon in the top right
  2. Select your group
  3. Enter the details of your event
  4. When finished, tap Add

From inside the Group Calendar:

  1. Tap on the blue plus icon top right to go to Add Event
  2. Enter the details of your event
  3. When finished, tap Add

These events will live within your group calendar. All participants of the chat will be able to see these events in their calendar and make changes to the event info together.

How do I message a friend?

From the Chats tab:

  1. Tap the blue create chat icon in the top right corner
  2. Select the participant from your contacts
  3. Tap Create

If your friend is yet to download Onin, you can invite them. You'll be notified as soon as they join.

How do I create an event chat outside an existing group chat or direct message?

Perfect for events when you want to keep the chat outside your of your existing group calendar chat or direct message.

From the Calendar tab:

  1. Tap the blue plus icon in the top right
  2. Select the participants
  3. Select a Category by tapping on one of the category icons
  4. Tap Title to add a title for your event
  5. Tap Starts to add the date and time your event starts
  6. Tap Ends to add the date and time your event ends
  7. For all-day events, tap the toggle icon to the right of All-Day
  8. Tap Location to add the location of your event
  9. Tap on New Chat
  10. Tap the blue Create in the top right

How does the keyboard calendar work?

To access your calendar from your keyboard:

  1. Enter any chat
  2. Tap the gray calendar icon below the message bar
  3. Scroll to see all your upcoming events
  4. Tap Shared to only see events between you and the chat participants
  5. Tap on any event to see the event details and make changes
  6. Tap the blue New Event to add a new event to your calendar

How do I delete my account?

From the Calendar or Chats tab:

  1. Tap your Profile Photo in the top left of the screen
  2. Tap Privacy & Security
  3. Tap the red Delete Account

Please know that once deleted, this cannot be undone.

Why do I need to use my phone number to sign up?

We require your phone number to sign up to Onin for two main reasons:

  1. Most people only ever have one phone number but have many other identities like email or third party accounts. As your Onin account is universal, working with all your calendar accounts across your working and personal life, this single unified identity best represents your Onin account.
  2. Phone number confirmation on iOS and Android is a fast and easy sign up method, you don't need to leave our app to verify it. With other methods like email, you have to leave our app and might not receive verification emails.

Your phone number is never made public and is only visible to contacts that already have it.

What is Onin?

Onin is a privacy-first social calendar app, for you and friends. The app securely combines calendar and chat in one place, keeping your calendar connected to the conversations that drive it. Invite your friends, add events to your calendar, and plan together in the chat.

Onin is designed to help friends, family, and partners plan any event: a coffee date, dinner, party, weekend away, or once in a lifetime road trip. Whilst the app is wonderful with friends, it’s also a private space to schedule things just for you: events, reminders, and to-do’s.

Onin is for your eyes only. We secure your chats, calendar events, and profile with end-to-end encryption. This means that nobody but you can see your private information, not even Onin. We believe privacy is a human right, and will always value privacy above all else.

Is it free?

Yes, the app is completely free. We will never compromise your privacy to monetise the app. In the future, we plan on releasing a premium subscription that offers Onin super-fans a premium range of features to make planning their personal and social life even easier.

How do I download the app?

Onin is currently invite-only. We’re controlling the roll out to ensure that everybody has the best possible experience trying Onin. You can join the waitlist now here.

If you know somebody using the app, they can invite you and give you early-access now.

Please note Onin is currently only available on iOS. We’re working hard to bring the app to Android and Web as soon as possible. Those on the waitlist will be first to hear.

Why do you need my phone number?

Onin uses phone numbers to help you easily connect with people in your contacts. We use phone numbers instead of emails as this is simpler for friends and family who rarely communicate by email. Your phone number is only visible to other users that already have it in their contacts and we will never share your phone number to those who don’t.

How do I invite people?

Onin uses phone numbers From the Calendar or Chats tab:

1. Tap your Profile Photo in the top left
2. Tap Invite Friends to Onin
3. Tap Invite next to the name of the contact you’d like to invite

There is currently no limit to how many contacts you can invite. Bring your friends along!

How do I add my external calendars?

Onin uses phone numbers From the Calendar or Chats tab:

1. Tap your  Profile Photo in the top left
2. Tap External Calendars
3. Tap Allow Access (this allows Onin see events from your other calendar providers)
4. Select the calendars you’d like to see in Onin
5. Tap the back arrow in the top left to return to Settings

How do I add an event to my calendar?

From the Calendar tab:

1. Tap the plus icon in the top right
2. Add Event Participants, or Skip if the event is just for you
3. Select a category
4. Add a title
5. Add a schedule (by selecting a date and time)
6. Add a location

Every Onin event had a dedicated chat. If you have an existing chat with the event participants, you can select to add your event to this chat, so you don’t have a duplicate group chat. Or, you can create a new chat just for this event.

How do I message a friend?

From the Calendar tab:

1. Tap the plus icon in the top right
2. Add Event Participants, or Skip if the event is just for you
3. Select a category
4. Add a title
5. Add a schedule (by selecting a date and time)
6. Add a location

Every Onin event had a dedicated chat. If you have an existing chat with the event participants, you can select to add your event to this chat, so you don’t have a duplicate group chat. Or, you can create a new chat just for this event.

How do I create a group chat?

From the Calendar tab:

1. Tap the plus icon in the top right
2. Add Event Participants, or Skip if the event is just for you
3. Select a category
4. Add a title
5. Add a schedule (by selecting a date and time)
6. Add a location

Every Onin event had a dedicated chat. If you have an existing chat with the event participants, you can select to add your event to this chat, so you don’t have a duplicate group chat. Or, you can create a new chat just for this event.

How do I create an event chat?

From the Calendar tab:

1. Tap the plus icon in the top right
2. Add Event Participants, or Skip if the event is just for you
3. Select a category
4. Add a title
5. Add a schedule (by selecting a date and time)
6. Add a location

Every Onin event had a dedicated chat. If you have an existing chat with the event participants, you can select to add your event to this chat, so you don’t have a duplicate group chat. Or, you can create a new chat just for this event.

How does the keyboard calendar work?

Privacy is at the heart of Onin, and we will always go the extra mile to keep your data, conversations, and events secure. It’s why we’ve chosen to be end-to-end encrypted from day one. Onin is the most private calendar by default available on the market today.

With end-to-end encryption, your messages, photos, documents, calendar events, profile image, name, and mobile number are kept private. This is because end-to-end encryption ensures that only you can see the contents of your messages and calendar events. All of this happens by default within the app, and you don’t need to do anything to enable this.

What is End-To-End Encryption?

To access your calendar from your keyboard:

1. Enter a chat
2. Tap the calendar icon below the message bar
3. Scroll to see upcoming events
4. Tap Shared to only see events between you and the chat participants
5. Tap New Event to add an event from without leaving the chat

What is Two-Factor Authentication?

Two-Factor Authentication is an extra layer of protection used to ensure the security of your account, beyond just your phone number. You can add an email as a secondary authentication method in Settings. Here’s how:

From your Calendar or Chats tab:

1. Tap your Profile Image in the top left of the screen
2. Tap Privacy & Security
3. Tap Authentication Methods
4. Tap Add Email
5. Enter your email and tap Next
6. Re-enter your email and tap Done

How do I delete my account?

Two-Factor Authentication From the Calendar of Chats tab:

1. Tap your Profile Image in the top left of the screen
2. Tap Privacy & Security
3. Tap Delete Account

Please know that once deleted, this cannot be undone.

Still have questions?

Our team is here to help

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