Rolls and friends

My roll and shared rolls

My roll is the one you start with: yours alone, for the prints you keep to yourself. A shared roll has members; everyone on it sees every print, can react and comment, and gets a notification when a new print lands. A print to My roll notifies nobody.

Making one

Create Roll, give it a name (up to 40 characters), pick friends to put on it. The roll exists on your phone before the server has answered, so there is nothing to wait for. You can rename it and change its cover later; any member can set the cover.

Owner and members

Whoever made the roll owns it. The owner can delete the roll, remove members and delete any print on it. Members can add people, add prints, set the cover and leave. If the owner deletes their account, the longest-standing member becomes the owner.

Leaving a roll

From the roll. Your prints stay on it for the others unless you delete them first. You can be re-invited later.

What a link shows before someone joins

A link looks like probablylate.app/r/<token>. Opening it shows the roll’s name, its cover picture, who sent the invite, how many people are on it, how many moments it holds, and up to five of the members’ faces without names. It does not show any print. Looking at the page does not use up the invite; only joining does.

How long a link lasts

Seven days from when it was made, for 25 joins (the person who made it can choose fewer, or up to 100). After that the page says the link has expired or is used up, and anyone on the roll can make a fresh one.

Switching a link off

The person who made the invite can cancel it, and it stops working at once. The token itself is never stored on our side — only a hash of it — so a link cannot be read back out of the database.

Opening a link

With the app installed, iOS opens the link straight in the app and you see the join page. Without it, the web page appears; tap Join Roll to try the app, and if nothing takes over it sends you to the App Store. The same link works again once you have the app. Links are made on probablylate.app; ones sent earlier from probablylate.com still open.

Adding a friend

Search for their exact username, open their page and ask. A request has to be accepted by the other person; until then neither of you sees anything of the other’s. You can also share your own page — probablylate.app/your-handle — from your profile, or let someone scan the QR on your membership ticket.

Friends from contacts

If you allow access to Contacts, the app hashes each email address and phone number on your phone (SHA-256; emails lower-cased, numbers reduced to digits, with and without the country code) and sends only the hashes, asking which belong to people already here. No name, number or email leaves the phone, and the hashes you send are matched and then discarded — they are not stored.

Matching works because each account keeps a hash of the email it signed in with, and of a phone number only if you add one to your profile. If friends can’t find you from their contacts, that is usually why: add the number they have for you.

Suggestions

Friends of your friends, and anyone matched from contacts. Nobody is suggested from anything else — there is no browsing of strangers, and usernames can only be looked up exactly, never listed.

Removing a friend

From their page. The friendship ends on both sides; shared rolls stay as they are. Either of you can ask again later.

Blocking

From their page, or from the Remove/Block button on a friend’s profile. Blocking removes the friendship, stops them sending you another request, and they are not told. Blocked accounts are listed under Settings → Privacy & Safety → Blocked Account, where a block can be undone. If someone is behaving in a way that needs more than a block, tell us.

What a public roll is

Every roll starts members-only. A roll can be made public, which means it appears on its members’ profile pages and anyone signed in to the app can open it and look through its prints — look, not post: only members can add prints, react or comment. There is no feed or discovery page that collects public rolls; the only way to one is through a person who is on it.

What your page shows

Your username, display name, bio, profile photo and banner, the number of friends you have, and the names and covers of your public rolls. That is also what probablylate.app/your-handle shows on the web, to anyone. Nothing from a members-only roll, and no print, is ever on it.

A friend's page

Opens in glass over whatever you were doing, with Remove and Block on the button, and their public rolls underneath. Tapping a public roll opens it as a sheet.