Cat Letter

Some days are worth keeping.

A birthday. An anniversary. The day you moved in. Or just a date you can't quite let go of — you're not even sure why.

Cat Letter is a quiet app for those days. You place them into a little home. Mantou, a small pixel cat, watches over them. When a day draws near, Mantou delivers a letter.

Waiting becomes something gentle.

Place a day

Any date — past memories, future hopes, today's rituals. Type: Birthday · Anniversary · Journey · New Home · Custom Choose an object: envelope · cake · calendar · frame · flower · star · heart

Mantou does three things

Keeps watch: after you save, Mantou stays with your day in the little home. Delivers: when the day arrives, Mantou brings the letter to you. Stamps: for past days, a paw print is sealed on the memory postcard.

Countdown & Memory

Future days: shows how long until arrival (tomorrow · three days · still far away…) On the day: Mantou picks up the letter and delivers it. Past days: become memory postcards with a paw stamp, kept in your little home forever.

Fully private · Local only

Everything stays on your device. No account, no internet, no ads, no notifications you didn't ask for.

Mantou is here, waiting for your first day.