
Couples Diary: One Line
One line a day, between two
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Free
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About
You do not have to talk a lot every day. One line a day is something you can keep up. Couples Diary is a quiet shared diary for a partner or a spouse.
[One line a day, exchanged]
- You each write your line for the day
- Only on a day when both of you have written does the other person's line open (writing first never puts pressure on the other)
- Lines you have written can be read back quietly, later
[Remember the days that matter]
- Register the day you met, an anniversary, anything
- A quiet word the day before
- There is no limit on how many anniversaries you keep
[Designed never to nudge or compare]
- No reminder notifications sent to the other person
- No read receipts, and no "typing" indicator
[Free, with one optional purchase]
- The app itself is free. Exchanging lines, anniversaries and reminders, backup export and import, text export of your record, and text size and sound settings are all free
- A one-time in-app purchase (paid once, not a subscription) unlocks exporting your shared record as a PDF. The price is shown in the app before you buy, and everything above keeps working without it
[Made to be safe to use]
- No ads
- Your line and your anniversaries travel through a server that connects the two of you, and reach only each other (no photos, no location)
- No names and no accounts. All that connects you is a shared phrase
Not many words. Just one a day, between the two of you.
Developed by SAKURA PRODUCTS
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What's New in Couples Diary
1.1.3
October 15, 2026
• Added links to the Terms of Use and Privacy Policy on the purchase screen and in Settings. • The Today screen now shows your recent days together. • Corrected the store description to match the app (the app is free; PDF export is a one-time purchase). • On iPad, lists now use two columns with larger text. • The purchase screen now explains what stays free.
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