Nobody can message you unless you let them in.
No phone number to sign up. No email. No username. Strangers are not blocked and not filtered here. They have no door.
Coming soon to Android and iPhone
Create your account
The four things every other messenger asks for before it will carry a word.
None of these are asked for to sign up. KnownSquare has no phone number, email address, username or contacts permission.
No stranger can reach you.
You connect in person, or through someone you both trust. Nobody adds you to a group without your permission.
Learn more →Your papers, in the Locker.
The documents you go hunting for once a year, encrypted on your phone and easy to find.
Learn more →Plan an event, together.
Send a personal invite, see who is coming, split the bill without the argument, and keep the photos from the day.
Learn more →Every messenger you use starts by identifying you.
- Needs a phone number
- Yes
- A stranger can reach you
- If they have your number
- Added to a group without agreeing
- Yes, unless you change a setting
Signal
- Needs a phone number
- Yes
- A stranger can reach you
- If they have your number
- Added to a group without agreeing
- Yes, unless you change a setting
Telegram
- Needs a phone number
- Yes
- A stranger can reach you
- If they have your number or username
- Added to a group without agreeing
- Yes, unless you change a setting
KnownSquare
- Needs a phone number
- No
- A stranger can reach you
- No path exists
- Added to a group without agreeing
- Never
| App | Needs a phone number | A stranger can reach you | Added to a group without agreeing |
|---|---|---|---|
| Yes | If they have your number | Yes, unless you change a setting | |
| Signal | Yes | If they have your number | Yes, unless you change a setting |
| Telegram | Yes | If they have your number or username | Yes, unless you change a setting |
| KnownSquare | No | No path exists | Never |
As of August 2026. The others have settings that narrow some of this. The table is what happens to somebody who changes nothing.
Everything your family already does, in one place.
The chat is where plans are made. Here it is where they get done.
Decide together
Ask the question, let everyone answer, and turn the winning answer straight into the plan.
Learn more →Have you started?
Everyone’s arrival time on one board, instead of the same question twenty times over.
Learn more →Your day, on one screen.
Tick the morning tablets, write a note, take a two-minute stretch, and see what the family is planning this week.
Learn more →The shared list
Anyone adds, anyone ticks. The one thing every household still keeps on paper.
Learn more →Plans and headcounts, the bill and the settling, lifts, polls, lists and the Locker.
The quietest phone in the house.
KnownSquare is being built now, for Android and iPhone. The app will be free for families.
Coming soon