Other people's web games are flooding feeds, so it goes to the stores to catch them: a small Vietnamese studio's "8 Billion Lives" got 25k installs in two weeks

A web game "1 in 8 Billion," built by a Korean developer with AI in a few hours, has been spreading across Japan, Russia, and Southeast Asia, but the creator has never released a mobile version. Vietnamese studio KueMiin put out an app with the same gameplay on Google Play in Oct 22, called "8 Billion Lives: Life Sim." It got 25k installs in two weeks with no paid ads and no one making videos for it. What it sells isn't the product, it's a window of time. That window is closing now.

"A very sad website: your whole life plays out right in front of you."

On Oct 24, Russian TikTok creator error_its_me posted a video with a one-line caption: "1in8b.life, take it if you want. It's actually a sad little site: an entire life plays out in front of you." The video reached 2.75M views and 320k likes (TikTok, 11-06). Two days earlier, another Russian creator, randalainen, had a video on the same topic with 1.39M views. Earlier still, Vietnam's beatvn_official posted about it in Oct 12, with 930k views.

The videos show the web version. Someone who wants to play it on their phone opens the app store and searches "1 in 8 billion," "8 billion," or "life simulator." There is no official app, so the results are other people's apps.

KueMiin's app was listed right between those two Russian videos. Its cumulative Google Play installs went from 10-29 at 4,649 to 10-31 at 15,978, then 11-06 at 25,291 (Google Play install counts). The peak came a few days after the TikTok view peak, which fits the path of seeing a video, then searching the store.

The parent: one person, a few hours, one web game

"1 in 8 Billion" (Korean title "80억 분의 1") was made by Korean indie developer 진휘어스 (Jin Hwi-eus). Korean media say he worked with AI and finished it in about four hours, and it was made public in early October (Hankyoreh21 and namu.wiki give Oct 7). The mechanic: based on real birth probabilities, it randomly places you as one of today's newborns worldwide, across 172 countries. Income, illness, war, and early death all follow local statistics. You make choices year by year, then watch the whole life play back.

Around Oct 13 it went viral on Japanese X (AUTOMATON and ASCII.jp both covered it), then spread to Taiwan, Hong Kong, China (Tencent News 10-23), Russia, and France. The official site is still a web game, free to play, with a 3-dollar "memorial pass" (official site, 11-06). There is no official app.

What it is

The store page's first line reads "Of 8B people, which life will be yours?" On opening, a map spins and lands you on a country, a city, and a family based on real birth probabilities. After that, each year takes about a minute. The diary logs your first words, your best friend, your first job, a cat that wandered in and stayed. At key moments you choose: keep studying or go earn money, move to the city or not, get married or not, care for your parents or not.

Compared with the original web game, this is a native app that works offline. It adds pixel graphics, music, 1x to 16x speed-up, and a closing "life replay." It claims to cover 200 countries, with data from the UN, World Bank, and WHO. It's free to download, ad-supported, with in-app purchases of $9.99 to $19.99 each. Version 1.0.4. The store page shows no rating yet and no reviews.

KueMiin is not new to this. On Google Play it also has "Monster Music DIY: Mix Beats" (920k installs, launched in December 2025) and an aim trainer called "AimPro" (690k installs, up 7k in the last 118 days). The developer name on file is Bui Le Duc (Google Play, 11-06). It has also already shipped "Animal Life: Wild Simulator" with the same structure: you're randomly born as one of 70 animals, make choices stage by stage, and end with a replay clip. It's a small factory that ships whatever is trending.

Metric

Source: Google Play install counts and category charts (10-29 to 11-06).

Where the traffic comes from

Almost all of it is spillover from store search. The title hits both "8 Billion" and "Life Sim," and the store links in Google search results carry utm_term="8 billion lives" life sim. The countries where it charted (Vietnam, Thailand, Poland, plus Android-heavy markets like the Philippines and Nigeria) largely overlap with where the original trends on TikTok. Russia isn't in the chart data, but Russian-language videos were the most viral, so it may be the biggest unseen source (inference).

Smart category choice. Rival apps on the same theme sit in "Games · Simulation," where they compete with real games. KueMiin put its app in "Lifestyle," where one or two thousand installs a day is enough to chart in several countries, and charting brings more exposure.

No sign of paid acquisition or original content. Searching its name on TikTok turns up no videos made for it, no one mentions it on X, and the install curve rises in one wave and then falls, unlike steady paid campaigns.

Who it's competing with

HAYO's numbers already show interest fading: daily installs dropped from about 10-30k to about 24k at 11-06 and 1,300. Counting web, Android, iOS, and Roblox copies of this theme together, there are at least seven or eight.

If it were you

One-line verdict: this theme is already late. Don't build a ninth "8 Billion." What's worth copying is KueMiin's approach: watch for web games that just went viral and whose creators haven't released an app, and get a native version into the store within two or three weeks.

Who it suits: small teams or solo builders who move fast, can ship a usable Android version in a week, and don't mind throwing it away after. Also people who already run a few apps and understand store keywords and categories.

Who it doesn't suit: anyone trying to build a product with lasting retention and gradual monetization. Anyone who cares about copyright and reputation should note that this path is one step from piggybacking. If the original creator ships an official app, or the store decides you're misleading users, the traffic disappears.

How to do it: each day, check X, TikTok, and Reddit r/WebGames for web games that are going viral. Look for three types: ones an AI built in a few days, ones where the creator says "app coming soon" but hasn't shipped it, and ones whose gameplay is a complete experience you can finish (a life, a journey, an ending). Once you've confirmed nobody owns the store slot, name your app with "number or core keyword + category word" instead of the original name. Pick a low-competition category. Add things the original lacks, like offline play, replays, or music, to keep people who arrive from search. KueMiin took the "birth → yearly choices → replay" template and ran it again with animals. A template that works can be reused.

How to get users: you don't need to make content. The original's videos are your ads. Your job is to be on the first screen of results at the moment someone searches: put the several ways people search for the original in your title and short description, and launch as early as you can instead of waiting for polish.

When to move: the window is measured in weeks. For "8 Billion," launching after mid-November will mostly miss the traffic. For the next theme, launch within two or three weeks of it going viral.

Signs you've misread it: (1) KueMiin's daily installs fall to a few hundred or less and ratings don't come in, meaning the people arriving from search aren't staying. This approach would only bring one-time installs, and ads and in-app purchases wouldn't cover the cost. (2) Once the original's official app launches, the copycat's installs drop to zero within a few days, meaning the window is shorter than you think. (3) Google Play starts mass-removing apps that trade on the name.

---

Data and sources: Google Play store pages, install counts, and category charts (2026-10-29 to 11-06); App Store US page for HAYO (11-06); 1in8b.life official site (read 11-06); TikTok @error_its_me, @randalainen, @beatvn_official post data (read 11-06); ASCII.jp (10-15), AUTOMATON (10-13), Hankyoreh21, namu.wiki, Tencent News (10-23). No public data exists for KueMiin's country split, in-app revenue, or retention. Russia as the largest source is an inference.