01
Place a day
Give it a name and date, then choose a keepsake.
Cat Letter · iPhone app
Let a cat watch over the days you want to remember.
When the day comes, a letter arrives.
See how it works
02
Let Mantou keep watch
The day rests in the little home as it draws near.
03
Open a letter when the day comes
Mantou runs in with it.
Days in a relationship
A first meeting, the day you got together, a family birthday — keep the ones that matter to you.
Days with your cat
An adoption day, the first day home, a birthday — let Mantou watch over them too.
Life transitions
A move, a journey, graduation, a new job — give the change a place in the little home.
Keep the memory as a card
Before sharing a memory card, you’ll see what it contains. After you review it, you decide whether to send it.
Your records deserve care.
If a feature involves syncing, sharing, or a third-party service, Cat Letter will explain how related information is used and what choices you have before you turn it on. See the Privacy Policy for details.
Read the Privacy PolicyFAQ
What is Cat Letter?
It's an iPhone app for days you want to remember. Place a day, let Mantou watch over it, and open a letter when the day comes.
What days can I add?
Birthdays, anniversaries, first meetings, moves, journeys — or a date only you know the meaning of. Past, present, and future days are all welcome.
How does Cat Letter use my information?
If a feature involves the internet, syncing, or sharing, we’ll explain the purpose and your choices before you turn it on. See the Privacy Policy for details.
Do I need an account?
You don’t need an account to use the current version’s basic features. If a future feature requires one, we’ll explain before you turn it on.
Can I edit with a partner or family member?
Not yet. Cat Letter doesn't currently have shared homes or co-editing. Each person keeps their own days on their iPhone. You can choose to share a memory card, but the other person can't see or change your days or letters.
Which devices are supported?
Cat Letter currently supports iPhone.
Give your first day to Mantou.
Mantou will keep watch in the little home.