Free pen pal app · K-pop, K-dramas, Korean, anime and more
Pen pal app for Korean and global friends
Sea Pals is a free pen pal app for making Korean friends and friends around the world by letter. Mochi the otter looks for people who share your interests and languages. When someone accepts your letter, you can keep talking in Chats and raise Doori together.
- Pen pals
- Translation
- Group chats
- Shared pet
- Friend widgets



Find people who love what you love.
Make something.
You
Your friends
New people
What you keep
Write a letter. Mochi carries it across the sea.
dear someone far away, the tide came in slowly today and I thought, who's out there?
1Write a letter
Papers for every season. Write a few lines and seal them in a bottle.
- Mochi's at Noa's · next island in 2½h2
Mochi sails it to a few islands
Follow the trip in Sea Pals, or from your Lock Screen on iPhone.
- AcceptAna · Lisbon
wrote back · 9,100 km
3Accept a letter, and you’re friends
Your chat opens.
Magpies land on your island now and then. A magpie carries one letter to one person.
Your island is you.
A little island that is you.
Poke Mochi
Hops, flops, cracks a clam. Tok tok tok.
Decorate with what you find
Find things on your island, receive gifts from visitors and keep souvenirs from Mochi’s trips.
Today's mood
Mochi wears it for your friends.
Set your song
Paste any song link. Friends tap to listen.
Same otter. Your way.
Your friends, next door.
One camera
A photo to one friend, or all of them. It lands in Sea Pals, and on their Home Screen on iPhone.
Weather on their island
Rain, snow or petals, from you.
Same find
Find the same sea glass on the same morning, and you both get a moment.
A pet you raise with your best friend.
A hermit crab you share. Boop it in Sea Pals, or from your Home Screen on iPhone. Its shell grows as your friendship does.
Up to 6 friends, anywhere.
Translate a message
Built-in, on supported devices and language pairs
Every Sunday evening, your week washes up.
Photos, booth strips, finds and letters you kept, all in one place.
What you keep.
Postcards from every island
Booth strips, together or apart
A year of moods
Friends fill in a page in your friendship book.
See a bookA little help with your next letter
All guidesCosy, on purpose.
- No streaks.
- No red badges.
- Skip a day, a week. Nothing is lost.
- No coins, no packs.
- Bottles and magpies are earned.
Safe by design.
Someone new never sees your birthday, exact place or username
Distances are rounded.
Photos from someone new wait for you
A few messages each, then your yes.
Every word from someone new is checked
Block, mute or report from any chat.
Questions
Is Sea Pals free?
Yes. You can use Sea Pals for free on iPhone, Android and the web.
Can I meet Korean or Japanese pen pals?
Shared-language matching can help you meet Korean or Japanese pen pals. Mochi chooses where letters go; you cannot choose a country or person.
Is it safe for teens?
In Sea Pals, teens 13–17 are matched only with other teens, and adults only with adults, subject to country minimum ages.
Do I need to speak Korean?
No. Write in a language you use or are learning, and look for Translate in a message’s menu.
Your island is waiting.
Free on iPhone, Android and the web