The archive · Consumer Apps · Product decision · 2025–2026
Sileme's blunt-name bet: a ¥1,500 safety app tops China's paid charts
Three part-time devs spent ¥1,500 betting solo dwellers would pay for a blunt safety check-in app; it went viral in Jan 2026, then forced a rename.
Sileme (死了么) / Demumu — Moonscape (月境) Technology
What the business is
Sileme (死了么, literally "Are you dead?") is a paid iPhone safety app for people living alone: set one emergency contact and check in, and after consecutive missed check-ins the system emails that contact, later adding SMS, so an emergency at home alone is not discovered too late.
Starting capital：Built by three part-time developers in under a month for about ¥1,500 (US$215); initial price ¥1, raised to ¥8 as server costs hit; first funding round later reported at roughly ¥7M.
How it started
In mid-2025 the Zhengzhou-based project lead, Lu Gongchen, kept meeting the same ask in online communities: a lightweight safety tool for the millions of young Chinese who live alone in big cities. He and two friends built it part-time in under a month for about ¥1,500, launched it quietly on iOS in 2025 at ¥1, and saw little until 2026-01-10, when a social-media post about the app's name set Chinese feeds alight.
What happened
The wave came with real costs: server bills jumped, so the team raised the price to ¥8 and rushed SMS alerts in. Investors circled — an early plan to sell 10% for ¥1M became talk of a near-¥100M valuation within days, and the team says it was already profitable. The blunt name also drew criticism, clones and copycat listings, and on 2026-01-15 the founder confirmed the original listing had been required off the stores. The team re-ran the name publicly — Demumu was chosen for the international rollout, and a user-naming drive later produced the warmer Chinese name 在么在么 ("Are you there?").
How it ended up
Still running as of late May 2026, and growing up rather than sideways: Lu left his day job in February, incorporated a new Hangzhou company, closed a first round the founder puts at roughly ¥7M, and expanded the team to four. The product now pairs the app with a wristband for silent SOS and fall alerts, and a community pilot in Hangzhou's Zihuabu neighborhood has about 50 elderly residents checking in with social workers as their emergency contacts.
Background
Sileme (死了么, "Are you dead?") began as a side project in mid-2025: three post-95 developers in Zhengzhou spent about ¥1,500 and under a month building a paid iPhone app for people who live alone. The user sets one emergency contact and checks in; if consecutive days pass without a check-in, the app emails — later SMSes — that contact, so a medical emergency alone at home is not discovered too late.
The name came from the users themselves, from young netizens discussing the fear of dying unnoticed in a big city. That bluntness was the whole marketing plan: when a post about it went viral on 2026-01-10, downloads multiplied roughly 100x within days, the app hit #1 on the App Store paid chart — within about 36 hours by one retrospective — and held the top of the paid download charts for four straight days.
Success brought friction. Server bills forced the price from ¥1 to ¥8. Investors offered valuations near ¥100M within days of a founding team that had planned to sell 10% for ¥1M. And the name attracted criticism, clones and copycat listings; on 2026-01-15 the founder confirmed the original listing had been required down. The team relaunched under new names — Demumu internationally and, after a public naming drive, 在么在么 ("Are you there?") at home.
Four months on, the company had left Zhengzhou for Hangzhou, closed a first round the founder puts at roughly ¥7M, grown to four people and added a wristband with silent-SOS and fall alerts. In late May 2026, roughly 50 elderly residents of a Hangzhou community were using the system with social workers as emergency contacts — a live bet that the viral check-in joke could grow into a real safety service.
What has to be true
- The idea was proven by its users before a line of code existed: young netizens repeatedly asked for a check-if-I-am-alive app, so the team built what the community had already described.
- The blunt name was distribution — self-explanatory, meme-friendly and free to spread — while the product inside was a one-screen dead-man's switch anyone could learn in seconds.
- The economics made the upside pure option value: ¥1,500 and three part-timers meant a total loss was trivial, and pricing could move from ¥1 to ¥8 once real server and SMS costs appeared.
- The January takedown forced an early re-platforming: instead of defending one viral name, the team kept the insight (solo safety) and rebuilt around SMS, a wristband and elder-care pilots.
What can be applied
A blunt name that voices a real, unserved fear is distribution. But a meme-built brand carries store-policy and copycat risk, so treat the provocative name as a vessel, not the business.
Aftermath
As of 2026-05-31 the service is live under its new names and is no longer only an app: the four-person Hangzhou team ships an emergency wristband with silent-SOS and fall alerts, and is piloting in a Hangzhou community of 7,560 residents (~2,300 over 60), where ~50 elderly users check in with social workers as emergency contacts. The founder says a user-naming drive produced the current name and that the first round was about ¥7M. The open question is whether a meme-launched safety brand can become a durable, hardware-backed business serving China's 100M+ solo dwellers.
Sources
- China's Viral Are You Dead? App to Go Global Under New Name
- 对话“死了么”APP创始人：开发成本1000多元，计划出售10%股份
- “死了么”App被下架
- 专访丨“死了么”APP创始人：四个月来我经历了什么？
- 前“死了么”APP创始人谈公司落户杭州
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