
Syncbox: Couple App
Private SNS for two
0 ratings
Free
Rating summary
About
Syncbox is a private space for just two people - a couple, or two close friends.
It is not a social feed built to be seen. It is a box where letters and conversations that reach only each other pile up, one by one. The quiet wait for a letter that might be there, the flutter of opening it - all of it becomes your story together.
◆ Made for
· Couples who hate watching chat messages scroll away and disappear
· Partners who exchange letters on anniversaries but have nowhere to keep them
· Two people in a long-distance relationship who want to send their hearts more carefully
· Best friends who live far apart but still want to share everyday life
◆ Weekly letter
Once a week, write a letter with real care. Attach photos and a song. You can unsend it as long as it has not been read.
◆ Q&A (two-way questions)
Answer questions like "When did you first fall for each other?" Both answers are revealed only once you have both written yours. A new question each time, to know each other a little deeper.
◆ Piece letter
It does not have to be a long letter. Send a small piece of your heart the moment it comes to mind, and trade replies.
◆ Feed
Share today's moment with one photo and a caption. Emoji reactions and comments keep the conversation going lightly.
◆ DM (real-time chat)
A messenger for just the two of you: quoted replies, emoji reactions, photos, videos and voice messages, chat search and jump-to-date. Star the messages you want to keep.
◆ Bookmarks
Gather the letter lines, photos and chat moments you want to treasure in one place - your shared keepsake box.
◆ Privacy you can count on
· Strictly 1:1 - connected only to the one person you invite
· App lock with a PIN and Face ID / Touch ID
· Notification emails never include the message body
· All data travels over encrypted connections only
Time passes, but what you shared can stay.
Start keeping your story in Syncbox today.
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What's New in Syncbox
1.0.3
November 5, 2026
Swipe from the left edge to go back.








