Heartbeat Mailbox
Anonymous letters arrive at random. Reply within 24 hours or they vanish.
Estimated downloads
IndieTower estimateSee how many downloads this app getsEstimates for every app are part of the Indie plan.
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About
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.Read more
Store page changes
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Versions
- Version 1.0.5First seen · 7 Oct 2026
• Super mail: send the same letter to 10 people at once<br>• Send a letter that came back without a reply once more, for free<br>• A gentle reminder to turn on notifications so you never miss a reply<br>• Exchange up to 3 letters with the person who replied<br>• Keep the story going after 3 exchanges with express mail<br>• See your earlier letters in a continued letter<br>• Replies you report or block are hidden right away<br>• Safety improvements<br>
Countries
Seen in 1 country Soft launch
Countries where IndieTower has seen this app in charts, search or store pages.
Chart positions
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