Overview
- The minimalist check‑in app asks users to confirm their status daily and emails a designated contact if they miss multiple days.
- It briefly led Apple’s paid chart in China before disappearing from mainland Apple and Android stores, with listings still visible in places such as Hong Kong.
- Developers renamed the app Demumu and raised the price to 8 yuan after global attention, shifting from an earlier near‑free model.
- One founder told NBC News the three‑person team built the app for under $150 and now pegs its valuation at about $15 million.
- Researchers and commentators tie the app’s traction to rising solo households in China, with projections of up to 200 million one‑person homes by 2030 and growing fears of dying alone.