Heartbeat Mailbox Android
11 days old
Heartbeat Mailbox is #157 in Social Free on Google Play in South Korea and charting in 1 of 15 countries we track.
Updated 12 Oct 2026 · rankings refresh through the day
DeveloperTechin Park
CategorySocial
PriceFree
Released
Installs0+
Rating–
Updated–
Content ratingTeen
Best rank now
#157
Social FreeMeasured
Heartbeat Mailbox on Google Play
App details
App ID
com.tmsae.heartmailbox
Publisher
박태진
Publisher country
South Korea
Content rating
Teen
Heartbeat Mailbox downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Google Play shows an exact lifetime install count; downloads per day are its daily change (measured). When Play hasn't refreshed the count, they come from new ratings and Top Free chart positions. Confidence is the chance the real number is within half to double ours.
Where it ranks on Google Play
Every top 200 chart it appears in across 15 countries.
| Country | Charts | Rank |
|---|---|---|
| South Korea | SocialFree | #157 |
Apps near Heartbeat Mailbox on the chart
Social Free, around #157.
About Heartbeat Mailbox
Heartbeat Mailbox is an anonymous letter app where letters from strangers arrive at random.
💌 Your mailbox bounces when a letter arrives
Open the envelope and read a stranger's day. You never know who sent it.
⏳ Reply within 24 hours, or it disappears
If a letter touches your heart, send a reply. It goes straight back to the writer.
✏️ Send your own letter
Pick a cute letter paper and send a warm note to someone out there. We'll let you know when someone replies.
🌙 Take a break anytime
Pause receiving letters for today, 3 days, 7 days, or until you turn it back on.
🎟️ Stamps
One letter needs one stamp. Free stamps refill every day, and you can get more by watching an ad or buying a stamp pack. Subscribe to Premium for unlimited stamps.
🔐 A safe mailbox
• Insults, sexual content, phone numbers, links and messenger IDs can't be sent
• Report and block upsetting letters instantly — our team reviews reports within 24 hours
• No sign-up needed. Log in with Apple or Google if you want to keep your letters
Available in 17 languages. You exchange letters with people who speak your language.
💌 Your mailbox bounces when a letter arrives
Open the envelope and read a stranger's day. You never know who sent it.
⏳ Reply within 24 hours, or it disappears
If a letter touches your heart, send a reply. It goes straight back to the writer.
✏️ Send your own letter
Pick a cute letter paper and send a warm note to someone out there. We'll let you know when someone replies.
🌙 Take a break anytime
Pause receiving letters for today, 3 days, 7 days, or until you turn it back on.
🎟️ Stamps
One letter needs one stamp. Free stamps refill every day, and you can get more by watching an ad or buying a stamp pack. Subscribe to Premium for unlimited stamps.
🔐 A safe mailbox
• Insults, sexual content, phone numbers, links and messenger IDs can't be sent
• Report and block upsetting letters instantly — our team reviews reports within 24 hours
• No sign-up needed. Log in with Apple or Google if you want to keep your letters
Available in 17 languages. You exchange letters with people who speak your language.