PinkyPromise: Couple Contract
Turn promises into keepsakes
Only for iPhone
Free
iPhone
A promise to your family. A vow to the person you love. Something you swore to a friend.
You meant every word of it at the time. Then months pass, and it turns into "you said" and "no, I didn't" — and something small becomes an argument.
PinkyPromise is a contract app built for one thing: promises between people who matter to each other. You write one down, pass a single phone from hand to hand, and everyone signs it themselves, right there, in their own handwriting.
■ Promises people make with it
・Say "welcome home" every single day
・Go on a real date at least once a month
・Take the family to the park every weekend
・Quit smoking
・Lose five kilos before we see each other again
None of this is legally binding. What it gives you is the small, warm shot of sincerity that comes from having actually signed your name to something.
■ What you can do
・Write a promise as a certificate — title, terms, what happens if it is kept or broken, and a deadline
・Pass one phone around and collect a handwritten signature from everyone involved
・Watch it seal with a pinky swear stamp the moment the last signature lands
・Record it as Kept or Not kept once the deadline passes
・Save the certificate as an image and share it
・Look back on every promise you have made, gathered in Memories
Pinky promise. Cross my heart and hope to die.
The weight a promise carried when you were a child — now that you are not.
Promise made, promise kept.
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Updated links to our new official website.
The developer, Mouette, inc, 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 Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Mouette, Inc.
- Size
- 75.7 MB
- Category
- Lifestyle
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Copyright
- © ＠2026 Mouette, Inc