Invite-only · For close friends

Your moments,
stacked with
the people
who matter.

A private space to share photos and memories with your closest friends. No likes. No algorithm. No strangers.

Tokyo trip
42 photos
Weekend
12 photos
Beach day
28 photos
Features

Built for the people on your speed dial.

Stacks

Organize photos and posts into stacks — trips, milestones, inside jokes. Pin the ones that matter.

Photo dumps

Drop a batch of unfiltered moments from your camera roll. No captions required. Friends see it on their feed.

Reactions, not likes

React with emoji to anything your friends post. No counters. No public scoreboard.

Invite-only friends

Send a link to add someone. No public profiles, no follower counts, no discovery feed.

Tagged moments

Tag friends in a memory. It lands in their feed too — a shared record of where you were.

Private by default

Photos are stored encrypted and served through signed URLs. Only your friends can see them.

How it works

Three steps to your inner circle.

01

Sign up with your phone

One-time code by SMS. Pick a username. That's it.

02

Invite your people

Send a link. They join your circle when they accept. No suggestions, no algorithm.

03

Stack your memories

Drop photos. Tag who was there. Group them into stacks. Share what's worth sharing.

Privacy

Your photos.
Your circle.
No one else.

Stacks isn't a social network. There's no public profile, no follower count, no explore page. Your content is served from encrypted storage through short-lived signed URLs. Friends-only, by design.

  • End-to-end TLS, encrypted-at-rest storage
  • Signed URLs expire in minutes
  • No ads, no third-party trackers
  • Delete your account, your data goes with it
// example.signed-url
https://cdn.stacks.app/photo/abc123?Expires=1715515200&Signature=...
Each photo URL is signed by a private key on our servers and valid only for a few minutes. Even if a link leaks, it stops working before it can spread.

Ready to stack?

Free to download. Free to use. Just bring the people.

Download for iOS Download for Android