postin -postcard SNS-
Photo postcards for your love
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
A little love, in a postcard.
“Thank you for today.”
“I can’t wait to see you again.”
With postin, turn your favorite photos and a few heartfelt words into a digital postcard for the person you love.
Share it through LINE. Your partner can open it in their browser—no app download or account needed.
After a date. On a day you wish you could be together. For a birthday or anniversary.
Give them a little something to open, smile at, and cherish.
■ Make it yours
Add a photo, write a message, and decorate your postcard with handwriting, drawings, and stickers.
A stamp is already in place, so you can start creating right away. You can swap it for another one, too.
■ Share through LINE
Create a link to your postcard and send it through LINE.
Your partner simply opens the link to view the card in their browser—even if they don’t use postin.
■ Open now, or save the surprise
Let your partner open the card right away, or choose the date and time it becomes available.
Make it a surprise for midnight on their birthday or the morning of your anniversary.
Note: Scheduling sets when the postcard can be opened. It does not automatically send a LINE message. Please share the link with your partner in advance.
■ Try your first postcard
Create and send a postcard in the tutorial without using a stamp.
Start with a photo you love and something you’ve been meaning to say.
■ Stamps and subscriptions
Regular postcard sending and share-link creation use stamps.
Additional stamps are available through in-app purchases.
An optional subscription includes unlimited sending, subscriber-exclusive stationery, and desk backgrounds.
Receiving and viewing postcards is free.
Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours before the current period ends.
You can manage or cancel your subscription in your App Store account settings.
See the in-app purchase screen for pricing and subscription periods.
Terms of Service:
https://honey-cucumber-463.notion.site/postin-3adcc260b87780bc9705ff7010973037
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The member directory feature has been discontinued. (As the service is transitioning to a closed SNS, age restrictions are being relaxed accordingly.)
You can now send postcards to recipients who do not have the app installed; you will need to share the link via services like LINE.
UI/UX improvements have been implemented.
The developer, keishi yokoi, 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 Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- User Content
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- keishi yokoi
- Size
- 49.7 MB
- Category
- Social Networking
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Subscription Plan (Monthly) $1.99
- Annual Subscription $19.99
- 5 Stamps $0.29
- Copyright
- © 2026 postin