In the App Store review section, we often see this debate: "Why pay 15 RMB for a simple countdown function? Can't I just set an alarm myself?"

That's a good question. Technically, it's not complex. But emotionally, what does that 15 RMB actually buy? We interviewed several real users to find the answer.

User A: The "City Drifter", 23 Years Old

"I'm not afraid of bad guys; I'm afraid of being forgotten."

Zhang lives in a single room in an urban village. The soundproofing is poor, and she can hear footsteps in the hallway every night, yet she feels incredibly lonely.

"For the first few months after moving out, I had insomnia. I would imagine slipping in the bathroom or fainting from a sudden illness. The scariest thought was: maybe no one would find me for three days, five days, or even a week, until the landlord came for rent."

"The day I downloaded Demumu, I put it on my home screen. The first thing I do when I wake up is tap that button. In that moment, I feel connected to the world. Someone—even if it's a program—cares if I'm alive. For that certainty, 15 RMB is worth it."

User B: The Freelancer on the Road, 35 Years Old

"It's a contract between friends."

Li is a photographer who travels constantly, sometimes into deep forests. He has no fixed partner, and his friends are scattered across the country.

"I set my best friend as my emergency contact. We agreed: if she gets an email from Demumu, don't call the police immediately—call me first."

"This app is like a contract, or a token, between us. It makes me feel that no matter where I go, there's a string attached to me. Before, this string came from parents; now, we tie it ourselves. It makes 'independence' not equal to 'isolation'."

User C: The Worried Mother, 56 Years Old

"To not bother my child, I choose to trust technology."

This user is special; she's not the user, but the payer. Auntie Wang bought a Demumu subscription for her only daughter working in another city.

"My child is busy. I used to call her every day to check if she was safe. But I know she found it annoying, saying my calls interrupted her meetings."

"Later, she recommended this software. We made a deal: as long as she checks in on time every day, I won't call to bother her. If she misses a check-in, that's a big deal, and my call is justified. This 15 RMB buys space and peace for both of us. Now, if I don't see an alert, I know she's fine, and I can sleep soundly."

Developer's Note: More Than Just an App

Compiling these stories gave us mixed feelings.

For anxious modern people, Demumu isn't selling code; it's selling the right to be remembered. In this atomized society, "being confirmed safe" is a luxury in itself.

Some say we are selling anxiety, but we prefer to believe we are facing anxiety head-on. We cannot solve loneliness, but we can provide a safety net, so you can have one less worry while enjoying the freedom of living alone.

Your 15 RMB buys not just a button, but your own peace of mind.