📈Last 7 days+63 installs — 11% faster than the week before (+57) · 7/day since Oct 9
🏆Among Social appstop 15% by installs gained this week (169 peers growing)
🛠Updatesactively updated · updated 29 days ago
Installs since launch
+241 installs
since Oct 9
Update history
1.0.18Oct 15, 2026 · seen Oct 23, 2026
• Letters now need at least 10 characters so your words reach people better. The writing screen lets you know if it's too short<br>
Only the current version so far — new entries appear as the app ships updates.
Heartbeat Mailbox is a social app by Techin Park with 100+ downloads (about 241 estimated). +63 installs in the last 7 days. Released Oct 1, 2026. Install growth, rank history, SDKs and ad networks.
From the store listing: “Anonymous letters arrive at random. Reply within 24 hours or they vanish.”
