A Korean nurse blogger's shift-scheduling app: all tools free, money from raising puppies

A Korean nurse named 도니켓, who posts about hospital life on Instagram, built an app for her followers that handles scheduling, checklists and IV calculations. It's called Nursing. In Oct 27 she posted an animated comedy short with tens of thousands of likes. Four days later the app hit #10 on the Korean App Store Medical Top Free chart, peaking at #12 on Top Grossing. Yet worldwide it had only 15 ratings, and on Android just 1,225 total installs. This piece covers three things: where the traffic came from, how money was extracted from a nursing tool nobody wanted to pay for, and what you can borrow and what you can't.

Four days after a "male nurse" animation

In Oct 27, the Instagram account @dounniquet posted an animated short titled 「남자간호사가 없어도 잘 돌아가는 이유」 (Why the ward keeps running even without male nurses). By Nov 6 it had 31.4k likes and 283 comments. Commenters wrote things like 「저희 엄마는 21년차 간호사인데 이거 진짜입니다」 (My mom has been a nurse for 21 years and says this is real), and others asked what anime it was from.

The video didn't mention the app. But the account bio said "a service for nurses," and the profile linked to Nursing. Over the next four days, both stores moved at once:

(Korean App Store and Google Play charts, 10-28 to 11-06; "—" means no data was retrieved that day.)

On Android, installs went up by 582 in a day or so, from 11-01 to 11-02. Both platforms rose at the same moment, which is hard to explain with organic store search and matches the animation's timing. However, 10-30 she also shipped a new version, and I couldn't verify whether paid promotion ran at the same time. Which factor drove the chart climb can't be separated (inference).

What it is

A phone tool for Korean nurses:

• Shift calendar: set colors for day, evening and night shifts (DAY / EVE / NIGHT), log monthly shifts, and total night and holiday hours.
• Shift-specific checklists: the tasks for day shift and night shift differ, and the checklist switches automatically with your schedule.
• Work notes: new nurses can record what they learn.
• IV drip rate calculator: supports only 20 gtt/mL drip sets, with the formula's source cited.
• Alarms: on iOS 26 it uses the system-level AlarmKit, since nurses dread a shift alarm that fails to go off.

The store description ends bluntly: scheduling, alarms, checklists, notes, IV calculation, community and pet-raising, all free.

It launched on Android first (by late August), then iOS in Sep 12, credited to developer doun jeong. Less than two months after launch the version reached 1.4.25,10-27 to 11-04, with near-daily releases. Its support page is hosted on a chatgpt.site subdomain. A solo developer moving this fast is likely using AI to write the code (inference).

Where users came from: her own Instagram

Distribution for this app relies almost entirely on the author herself. Her account covers clinical knowledge, hospital life and the frustrations of nursing. Her top post got 62.2k likes (a science explainer on how night shifts disrupt your body clock). Follower count requires logging in, so I couldn't check it.

She uses two kinds of posts for two jobs.

One converts: comment 🙌 and she DMs you the download link. Her Sep 18 post had one line, 「일단 받고봐요」 (just download it first), with 3k likes and 4.4k comments. Comments outnumber likes, and scrolling down is almost all 🙌. Her Sep 13 post 「체크리스트, 업무노트 진짜 goat」 (the checklist and work notes are seriously the GOAT) got 262 likes and 1.7k comments, again a wall of 🙌. This is a common Korean Instagram tactic: nearly every comment is a would-be downloader, and high comment counts push the algorithm to show the post more. By Nov 6, seven-week-old posts still had fresh 🙌 comments from a few hours earlier, suggesting either steady organic traffic or paid boosting. I found no evidence for paid boosting.

One thing that brings in new followers: relatability and humor. "죄송합니다" (sorry), 6.3K likes; "희망직업 2순위가 간호사..?" (Nurse is the #2 dream job??), 3.8K likes and 3.6K comments, tagged #입시 #간호학과 #고3, widening the audience from working nurses to high-schoolers and nursing students; plus the male-nurse animation from Oct 27 that got 31.4K likes.

The same account also takes brand sponsorships (an October compression-sock post tagged #협찬, sponsored). In early November she began steering her nurse followers toward her next app, 냉큼 (fridge ingredient management and YouTube recipe organizing), and every caption ends with 「앱스토어에서 '냉큼' 검색」 (search 'Nengkeum' in the App Store).

Beyond that there's no other channel. TikTok, X, Reddit, Product Hunt and the press show no trace of this app.

Where the money comes from: not the tools, but the pets and rooms

Nursing tools are hard to monetize. The app started with a subscription, and in Sep 19 a bad review said 「카카오톡 구글 로그인 다 안됨.... 결제까지 했는데」 (KakaoTalk and Google login both broken… I even paid). The support page still says, "If you subscribed before, cancel in your store's subscription settings." In early October it changed course: all tools are free, and money comes from a social and pet-raising layer on top.

• Raise a puppy and spend gold dressing it.
• Decorate your room with holiday "Editions": Halloween, Pepero Day, firefighters, police, and a nurse's hospital bed.
• Visit coworkers' rooms to play gomoku, flip-disc games, pushing games and puppy races, betting gold.
• AI photo pill identification and pet chat have free daily uses. Past that, they cost gold.
• Gold can be earned by watching rewarded video ads (up to 5 a day, 2 each) or bought. On Android, single in-app purchases run $2.09 to $44.99, and there are banner ads.

Why would nurses visit coworkers' rooms? Because shift schedules are meant to be shared. People on the same ward need to know who is working when. The app lets friends view monthly schedules, sends a push when "next month's schedule is out," and shows each pet's owner's shift for the day beside its name. The Nov 6 1.4.25 version added a one-tap invite link: tap it and you're friends and in the room. A solo scheduling tool thus gained a reason to pull coworkers in.

After switching to gold, it held a steady top-30 spot on the Korean Medical Top Grossing chart. But that chart's bar is low. In Nov 6 its neighbors included the pregnancy app 마미톡, the snoring tracker SnoreLab, and Complete Anatomy. The app itself had only 15 ratings, adding 3 per week. To hold the Korean medical top 30 spot, a few paying users is enough. Actual revenue isn't visible, but it's likely in the range of several to a dozen small in-app purchases a day (inference).

Users who stay ask for deeper features. In Oct 11 a 5-star review read 「어플칸 두줄 차지하는 2주 듀티를 볼수 있는 위젯을 만들어주세요」 (Please make a widget that takes up two rows and shows two weeks of duties). In Nov 2 a 4-star review said 「위젯할때 일정도 같이 보였으면 좋겠습니다」 (I'd like the widget to show my schedule too).

Who it's competing with

The nurse-scheduling niche in Korea is already crowded:

(Korean App Store ratings, 11-06; Google Play install counts.)

The most telling evidence is the row of solo-developer products with single-digit ratings. Functionally they're close to Nursing. What they lack is a nurse account with tens of thousands of likes. Nursing's tools are detailed, but that isn't why it took off. Its tools only determine whether the people who arrive stay. It succeeded through two things: the author's own traffic, and gold-based pet-raising built on "coworkers seeing each other's schedules." I haven't seen anyone copy the "nurse scheduling + pet-raising" combination.

If it were you

C: there's something to learn, but copying it isn't worth much. Its traction came from the author's nurse account with tens of thousands of likes, which followers can't replicate. The app itself is small (1,225 Android installs, 15 ratings), and its chart position mostly shows how low the bar is in Korea's medical category. The two real takeaways are how someone with a vertical audience can turn followers into downloads with comment-for-link posts, and how a low-willingness-to-pay profession tool can sell gold by leaning on the social ties that already exist in the job.

Who it suits: people who already run a content account in a profession's community (nurses, flight attendants, firefighters, police, pharmacists, shift workers), or indie developers who can partner and split revenue with such a creator; solo teams that use AI to write code and can ship close to daily.

Who it doesn't suit: anyone with no vertical audience who plans to rely on store search for nurse scheduling (the single-digit-rated Korean clones show how that ends), and anyone who wants to make money from subscriptions (the developer tried that and dropped it).

How to do it: change the country or the profession, not the model. First confirm that your target audience has the "coworkers need to see each other's schedules" social tie. Japanese and Taiwanese nurses on three-shift rotations are the closest fit. The developer has already built firefighter and police room decor, suggesting they're also eyeing other shift-work groups. Keep the tool layer fully free and genuinely useful (shift-specific checklists, reliable alarms, a schedule widget). Charge only for pet-raising, cosmetics and friend mini-games, using one-time gold purchases plus rewarded ads, and skip subscriptions.

How to acquire users: if you don't have an account, find one. Locate a creator in your target profession with tens of thousands of followers, and partner on revenue share or a buyout. She posts relatable content to attract new followers, then every few weeks posts "comment and I'll DM the link" to convert. Build one-tap invites into the app so coworkers can join each other's rooms, letting one ward bring in the next. Pack the store name with keywords like "essential for nurses," and niche categories in small countries have low bars, so climbing the chart earns free exposure.

When to launch: there's no hard deadline. Every spring a wave of new nurses starts work (in both Korea and Japan, 3–April). New hires most need checklists and notes, so launching before then is ideal.

Wrong call: (1) Nursing's Android installs are still in the thousands and its ratings are still in the dozens by next year, so the "raise a pet, trade for coins" model doesn't scale in a work tool. The creator's audience was the whole game. (2) The creator partner posted a "comment to get the link" post, got thousands of comments, and still only turned them into a few hundred installs. That only works on the creator's personal trust. (3) Users only used the shift schedule and never went into rooms, and nobody clicked the invite link. That means the social graph in this niche is too weak to sell coins.

Data and sources

App Store Korea chart, ratings, reviews and version updates, 10-28 to 11-06; Apple lookup API (11-06). Google Play installs, charts and in-app purchase range, 10-29 to 11-06. Creator's Instagram @dounniquet posts, likes and comments, read on 11-06. App support page and privacy policy. Anything marked "inferred" is inference.