On That Day: Time Capsule
Seal memories, open them later
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
New: a People screen for every capsule. See who's waiting to get in, who's already there, and choose what each person can do.
On That Day is a private time capsule for the people you choose.
Add photos, videos, voice notes and letters today. Seal them. They stay hidden — from everyone, including you — until the day you picked. Then the capsule opens, and you all see it together for the first time.
WHAT IT'S FOR
A first birthday to open at eighteen. A wedding capsule your guests fill on the night. A year of small things for someone far away. A letter for an anniversary. Anything worth waiting for.
HOW IT WORKS
1. Create a capsule and pick the day it opens.
2. Invite the people who should be in it. They add memories from their own phones.
3. Look through everything before the day, and decide what goes in.
4. On that day, it opens for everyone at once.
END-TO-END ENCRYPTED
Photos, videos, voice notes and text are encrypted on your device before they are uploaded. We store ciphertext. We cannot read your memories, and neither can anyone you haven't invited. Your keys are protected by a recovery phrase you control.
MEMORIES
• Photos — one at a time or a whole batch, with captions, dates, locations and the people in them
• Video — up to 30 seconds, recorded in the app or picked from your library
• Voice notes — say it instead of typing it
• Letters — written on real stationery
TOGETHER, NOT ALONE
Invite someone and choose what they can do: run the capsule alongside you, add their own memories without seeing anyone else's until the day, or simply be there when it opens. Every capsule has a People screen — who's in, who's waiting to be let in, what each person can do — and a record of what happened in it.
BEFORE IT OPENS
Nothing goes in unseen. Before the reveal, owners look through every memory and sign off on it — or leave it out. Memories you mark as a surprise stay sealed even from the other owners.
PRIVATE BY DESIGN
• No ads, no trackers, no third-party analytics or crash-reporting SDKs
• Nothing is written to your Photos library unless you ask for it
• Delete your account from inside the app, and choose what happens to the memories you shared
SIX LANGUAGES
English, Turkish, German, Dutch, Spanish and French — the whole app, including the permission prompts.
Free to use.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
A People screen for every capsule, and a list of things you told us were wrong.
NEW
• People is a screen now, not a sheet. Tap the faces on a capsule's card and you get everyone at once: who is waiting for you to let them in, who is already in, which invitations are still open, and which are closed.
• Choose what each person can do — add memories and run the capsule, add memories, or only look once it opens. Open their row, pick, save. When it can't change, it says why instead of failing after you tap.
• Copy the PIN. An invitation's four digits had no way to copy them at all. Now the link and the PIN both copy in one tap, and confirm where you tapped.
• Delete your own memory, from the three-dots menu in the viewer, while the capsule is still collecting — even after someone else has approved it.
CHANGED
• If you were invited to add memories, you now see your own memories in the grid before the capsule opens, instead of a locked panel counting them for you.
• The opening day moves both ways. It was never forward-only: the create screen said it was, and Settings enforced it. Both are gone — the only day you can't pick is one in the past.
• Adding a memory starts on the capsule you were last looking at.
• Who added a memory sits in one place now — bottom left on the grid, bottom left in the viewer, and off the photograph itself when you're looking at it full screen.
• The countdown to a memory fading shows on everyone's memories, not only your own, and the details panel spells out both the day it goes and how long is left.
• Editing a letter moved into the three-dots menu.
FIXED
• Long captions are no longer cut off — two lines over the photo, and the whole thing in the details panel.
• Sheets in Settings measure themselves instead of guessing a height, so a longer translation no longer quietly drops a line of the explanation.
• The delete, leave and block confirmations had a band of empty space above their buttons.
• A portrait video's clock no longer sits under the three-dots menu.
• A capsule's cover in Settings is the size it is on Home.
Everything is still encrypted on your device before it leaves it.
The developer, mehmet ali copurlar, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Contact Info
- User Content
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- mehmet ali copurlar
- Size
- 11 MB
- Category
- Photo & Video
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 5 more
- English, Dutch, French, German, Spanish, Turkish
- Age Rating
13+
- 13+
- Contains
User-Generated Content
- Copyright
- © 2026 Mehmet Ali Çopurlar
