A Korean-made "postcard across the sea" app: no chat, no follower counts, and one Japanese fan's post brought 1,500 users in a week
What it is A postcard app that only connects Korea and Japan. Snap a photo, write a line, send it. The stranger on the other side gets it already translated. Limited to 3 cards a day, with no chat or DMs.
Why it took off Japanese K-pop fans who want to get to know Koreans but don't want DM-style cold approaches found an anonymous, light, pretty outlet. One ordinary fan posted three screenshots calling it "healing," and 190k views carried it.
BHow you could follow this Pick another pair of countries or groups that like each other, don't share a language, and have a small time difference (e.g., Taiwan and Japan, or Thailand and Korea). Build the web version first and make the postcards pretty enough to screenshot. Recruit users yourself in fan communities on both sides, and personally fill in the side that's lagging.
- Data (updated daily) · first listed 2026-10-29 · Japan rating 20 · charted in 11-08 of 2 stores
iOS · best category chart rank · by store KoreaJapanData 2026-10-31 → 2026-11-08 (9 days, 8 observations). Lower rank is higher; gaps mean it wasn't charted that dayiOS · rating count · Japan Data 2026-10-31 → 2026-11-08 (9 days, 8 observations). Apple doesn't publish download counts; rating growth is a proxy for downloads.
Korean indie developer 오지우 (OH JIWOO) built a small app called "のり / 노리" that lets Koreans and Japanese send each other postcards: one photo, one line, automatic translation, 3 stamps a day, no chatting. In October 26 it had about 80 users in Japan. Two days later a Japanese SHINee fan posted about it, and within a week Japanese users reached 1,600. It's small and hasn't made money yet, but it shows the same mechanic, which others had run for 8 years without traction, can get organic shares once it's positioned differently.
One post, three screenshots, "recent healing"
2026 October 28, 6:43 a.m. (Japan time), X user "마유" (@mayuloves2min) posted three screenshots with the caption:
The latest comfort I've found is のり / 노리, a service where strangers in Korea and Japan send each other anonymous postcards, one every 1 days for 3 rounds. Like an online bottle mail. The messages are short and the limit is 3 per person, so you end up wanting to send only kind words ✉️ Even if you never get matched, the cats are so cute ☺️
Meaning: "のり is my healing lately. Someone somewhere in Korea and someone somewhere in Japan anonymously send 3 postcards a day. Like a web version of a message in a bottle. Short texts, only 3 a day, so you only want to send kind words. Even if nothing arrives, the cat is adorable."
She's not an influencer; her bio says "mostly SHINee fan, cats, and daily posts." The post reached 190k views, 3.6K likes, and 1.9K bookmarks as of 11-06 (X post page, 11-06). A few hours later the developer replied below, "I'm the developer of のり, the App version is in review and will be up soon," and that reply alone got 8,400 views. No sign of paid partnership; judged organic.
Numbers the developer reported: 10-26 about 80 people in Japan (launch post on Korean indie dev community VibeCrew); 11-02 Japan 1,600, Korea 430, and it reached #176 on the Japan App Store social chart (VibeCrew update post). Later the ops account said Japan passed 2,000.
What it is
The first line on the store page: "Take a photo, write a line, and send it. A postcard from someone in Korea across the sea will reach you." Then what it doesn't do: "No timeline, no follower counts, no DMs. Only a few postcards go back and forth each day."
- Received postcards are automatically translated into your language and stamped with the postmark of the sending city (Osaka, Fukuoka, Gyeongbuk).
- You can add a stamp or reply with a postcard. It's one card at a time, not a chat.
- 3 stamps a day, used for new sends and replies. Send one, receive one.
- All photos and text pass moderation first. Faces and contact info can't be sent. The recipient can't see your account name or email.
- The mascot is a little black cat named "노리", and the official Instagram posts animated shorts of it delivering letters across the sea.
Reviews in the Korean store are specific: "My Japanese isn't good, but I want to make Japanese friends. I write in Korean, they see Japanese, and when they reply in Japanese I see Korean. So convenient." "Stamps running out is a bit frustrating, but that's part of its charm. Catching up on replies and getting new postcards, looking forward to tomorrow." (App Store Korea, 10-30, 10-31)
It cold-launched as a web app on Cloudflare first, then shipped iOS at the end of October (the 10-30 ops account posted "finally on iPhone"). Android and desktop still run on the web app.
Why this one and not the others
"Photo postcard + random stranger + translation" is not a new idea. Korea's Daily Postcard (오늘도 엽서) launched 2018 years ago with nearly the same mechanic, aimed at the world. As of today it has 11 ratings in the iOS Japan store and 84 in Korea (iTunes, 11-06). のり got three things right:
It only connects two countries. Japan and Korea have no time difference and like each other. Japanese K-pop fans and Korean interest in Japan travel are both at high levels. "What an ordinary person across the sea is seeing in the sky today" is far more concrete than "someone somewhere in the world," and easier to tell stories about. The official account's copy is literally "Seoul 08:10, Osaka is also 08:10".
It removes the chat. Japanese people who want to meet Koreans have tools like HelloTalk and Tandem, plus a batch of Japan-Korea dating apps. DMs, cold approaches, and needing to keep replying are exhausting. のり reduces the interaction to one card: anonymous, limited, no need to reply. The viral line "Because there are only 3 a day, I only want to send nice words" is about exactly this subtraction.
Pretty enough to screenshot. Postmarks, postcard texture, a little cat. Screenshot it and post it, and it's already content. That viral post was just three screenshots and the word "healing."
But to be clear: what actually ignited it was that post, and luck played a part.
Where users come from
| Channel | Volume | Notes |
|---|---|---|
| Organic post from a Japanese fan | 190k views | The most important one; timing lined up right after Japan 80 → 1,600 |
| Ops account on X "하루키" | Thousands of views per post | The developer herself, replying to users in Japanese, posting milestones, tagged #노리 #のり便 |
| Korean indie dev communities | Dozens to a hundred-plus views per post | VibeCrew, Ruliweb, Disquiet, small volume |
| Threads replies | Unknown | Dropping App Store links under posts like "want Japanese friends, tried several apps, none worked" |
| Instagram / YouTube Shorts | About 106 followers | Cat animation, small volume |
No paid ads, creator deals, or press coverage found. In the Korean store, 10-29 to 10-31 there's a run of 5-star reviews with similar wording, possibly friends or early web users; unverified.
The current problem is the two-sided imbalance: Japanese users are more than 3 times Korean ones, and there aren't enough Korean-sent postcards to go around. The developer is recruiting users personally in Korean communities and on Threads. The Korean App Store social free chart 11-05 ranked #89, and 11-06 climbed to #13 (App Store Korea). But the Korean social chart has a low bar, so a few dozen downloads can get there, and I couldn't find what drove it. The Japan store was #93 the same day. Combined, the iOS rating count is only 28 (11-06).
Where the money comes from: almost nothing yet
The subscription "ノリ Plus" is ¥480 / ₩4,400:30 a month for replies within 2 days, letter stickers, seasonal postmarks, and a few extra stamps a day, plus widgets. The paywall sells exactly that: a few more stamps. The logic holds, but it has never charted in any top grossing list, and its revenue is negligible.
The cost sits on the other end: every photo goes through AI moderation and every sentence gets translated. The dev wrote in an update post that once users surged, rate limits got postcards stuck, and the AI flagged a street graffiti "Bomb" as a threat and banned a normal user, so they switched to not banning accounts on AI alone. Whether ¥480 a month can cover moderation and translation costs, and how many people would pay, can't be seen yet.
Who's nearby
| Name | Scale | How it differs from のり |
|---|---|---|
| Slowly | Official site claims 10M+ users | Global penpals, long letters, delivery delayed by distance, builds profiles |
| Daily Postcard (Korea) | iOS JP 11 / KR 84 ratings | Nearly the same mechanism, global, hasn't taken off in 8 years |
| HelloTalk | JP 60.6k / KR 47.5k ratings, charted in the top 5 of Social Top Grossing in both countries | Real-time chat language exchange, with DM harassment |
| Tandem | JP 16k ratings | Language-learning matching plus calls |
| hanil, ハル, Hana, 히토비토 and other new apps from the past 2026 years | Ratings 0~8 | Japan-Korea dating / translated chat, none of them gained traction |
| Postcrossing | Global community of physical postcards | Physical postcards cost money and take time to arrive |
No one is copying のり's approach yet.
If it were you
B. The format of "random, targeted pairing between two countries, one card at a time" has been shown to spread organically, but few people know about it. It's still small (28 ratings) and has no revenue; growth has depended on a single viral post, and cold-starting a two-sided market is inherently hard. Worth a small-budget test, but don't expect it to pay the bills.
Who it suits: 1–2 people who understand both sides' languages and cultures and can hold their own in both communities (e.g., a Chinese person living in Japan, a Japanese person in Taiwan); who can make a good-looking interface and a memorable mascot; and who are willing to go recruit users in both communities every day.
Who it doesn't suit: anyone who wants random global matching (Daily Postcard is the cautionary tale); anyone who wants to build chat or dating (that's HelloTalk's and dozens of dating apps' turf, plus the harassment problem); anyone who needs it to break even within a few months.
How to do it: pick a pair of countries or groups that "like each other, don't share a language, and are close in time zone" — Taiwan and Japan, mainland China and Japan, Thailand and Korea, and Vietnam and Korea are all worth testing (inferred; I haven't verified the competitors for each pair). Start with a web version: one page where you take a photo, write a sentence, get automatic translation, and send it with a city postmark; 3 stamps per day, send one and receive one; photos get moderated first, blocking faces and contact info. Once the first wave of people shows up, launch an app. Sell subscriptions for "more stamps, longer reply windows, seasonal postmarks," with pricing benchmarked around ¥480 a month.
How to get users: find a fan community that already "likes the other country," like it does — K-pop fans, Japanese drama fans, people who travel to Japan, Japan enthusiasts in Taiwan. The postcards need to look good enough that people want to screenshot and post them to X, Xiaohongshu, and Threads; the dev personally replies to every post in the other language. When one side has fewer users, go to that side's communities and reply to posts from people who want foreign friends.
Deadline: there's no hard window, and this isn't a platform loophole. But if のり gets Korea-Japan working well and expands to other country pairs, it will be first to market; getting it done before the first half of 2027 is probably safer (inferred).
Where the call could be wrong: (1) のり still had under a hundred ratings by late December and had dropped out of the top 200 on Japan's social chart — suggesting that viral post was a one-off, and people left once the novelty wore off; (2) its Korean side never caught up, and Japanese users started complaining they weren't receiving postcards — the two-sided imbalance is this format's fatal flaw, and you'll hit it with any other country pair too; (3) the reverse: if it stabilizes and starts charting on the social Top Grossing, that would mean people will pay for "a few more stamps," and it's worth doubling down.
---
Data and sources: App Store JP and KR social Top Free charts and rating counts (10-31 to 11-06); App Store listing descriptions and Korean-store reviews; iTunes lookup (11-06); X post pages @mayuloves2min, @erika28528593 (11-06 read); VibeCrew posts (10-26, 11-02), 루리웹 post (10-31); Instagram @nori_daily_; Threads replies; App Store pages and official sites for Daily Postcard, Slowly, HelloTalk, and Tandem. User counts are self-reported by the developer; anything marked "inferred" or "unverified" is an inference or hasn't been verified.
Research notes: competitor table, acquisition evidence, full research report
- Competitors
Name Where Launched Scale How it differs from this one Slowly iOS 2017 Official site claims 10M+ users Global penpals, long letters, you pick people and build a profile; のり only connects Korea and Japan, random matching, one photo and one sentence Daily Postcard / 오늘도 엽서(GH Planet) iOS 2018-09 iOS JP 11 ratings, KR 84 The mechanism is almost identical (photo postcards + global random matching + translation), but it targets the whole world and hasn't taken off in years; のり only does Korea-Japan, and its postmark and mascot design is stronger HelloTalk iOS 2012 JP 60k / KR 47k ratings, top 5 on Social Top Grossing Real-time chat language exchange, with DMs and pressure to flirt; のり deliberately avoids chat Tandem / Maum iOS 2015 / 2022 Tandem JP 16k ratings Language-learning matching plus calls, with a study burden hanil, ハル, Hana, 히토비토, セオト, Dailying and other new Japan-Korea exchange apps iOS 2026 Ratings 0~8 All dating / translated chat, none gained traction Postcrossing Web 2005 Global community of physical postcards Ships physical postcards, costs money and takes time; のり delivers digitally the same day - Where users come from
- Verified Organic viral post on X (Japanese K-pop fans): @mayuloves2min 10-27 post "のり / 노리 is a recent healing service," 190.2K views, 3.6K likes, 1.9K bookmarks; over the following week, Japanese users went 80→1,600
- Verified Brand account with hashtags on X: @erika28528593 "하루키" posts copy with #노리 #のり便, development progress, and user milestones ("Japanese users pass 2,000")
- Verified Korean indie developer community posts: VibeCrew 10-26 / 11-02, 루리웹 10-31, Disquiet product page, with views ranging from a few dozen to over a hundred
- Verified Traffic from Threads replies: account 「지우」 replies under posts from people looking for Japanese friends, recommending the app and pasting the App Store link
- Verified Instagram / YouTube Shorts animated clips: @nori_daily_ has about 106 followers and 14 posts
- Inferred Solicited reviews: KR store 10-29 to 10-31 has 5 consecutive 5-star long reviews with similar wording
のり / 노리 - 海のむこうのはがき (ios_6823844486) research report
Date: 2026-11-06. Sources: our appstore library (app_day / chart_rank / review / app_profile), App Store pages, the developer's posts in Korean communities, and original posts on X / Instagram / Threads.
One line
Strangers in Korea and Japan send each other "photo + one sentence" postcards, auto-translated by AI, with 3 stamps per day; no timeline, no follower counts, no DMs. Built by indie developer OH JIWOO (오지우, Korean), starting as a web version (around mid-October), with iOS to follow 10-29.
Verdict
It took off because a Japanese K-pop fan (a SHINee fan) 10-27 organically posted: 190K views, 3.6K likes, 1.9K bookmarks. The post hit Japanese people who "want to meet Koreans but are afraid of DMs and come-ons," and within a week Japanese users went from about 80 to about 1,600. The product itself is subtractive: postcards instead of chat, anonymity, limited stamps, automatic translation, postmarks, and a kitten mascot. That subtraction makes it feel safer and less tiring than the crowd of "Japan-Korea / language exchange" apps, and it's shareable, so people spread it on their own. The current bottleneck is supply and demand: Japanese users outnumber Korean users by more than 3 to one, and there aren't enough postcards on the Korean side. The developer is personally recruiting Korean users on Korean communities, Threads, and X, and it reached #13 on the Korean social Top Free chart 11-06. It's still very small, with no revenue signal.
1. Data (from our databases)
| Date | JP ratings | JP social Top Free | KR rating count | KR social Top Free |
|---|---|---|---|---|
| 10-31 | 0 | 97 | 0 | 203 |
| 11-01 | 6 | 141 | – | – |
| 11-03 | 13 | 142 | – | – |
| 11-04 | 18 | 142 | – | – |
| 11-05 | 18 | 192 | 8 | 89 |
| 11-06 | 20 | 93 | 8 | 13 |
(Source: appstore.app_day / chart_rank, genre 6005 Social; only charted in category charts, never on the overall or Top Grossing charts)
- iOS version 1.1.3 (11-04 updates); it shipped several versions within a week; JP average rating 4.85 (iTunes lookup, 20 ratings).
- The library captured 6 text reviews, all from the KR store, all 5-star, dated 10-29 to 10-31 (some on launch day). Content clusters around three points: automatic translation is convenient, the postcard design is beautiful, and stamps are not enough but "that's part of the charm." One review says "10 cards a day isn't enough," which doesn't match the current "3 cards a day"; the early version may have given more, unverified.
- Developer-reported user numbers: 10-26 Japan about 80 people (VibeCrew launch post); 10-27 Instagram says "758 postcards sent in two weeks"; 10-31 says about 1,500 users in Japan and not enough users in Korea (루리웹); 11-02 says Japan 1,600, Korea 430, and reached #176 on the Japanese social chart (VibeCrew update post); later the brand account said "Japanese users pass 2,000" and "200+ people came in just today" (X @erika28528593).
II. Competitors
| Product | Where | Launched | Scale | How it differs from のり |
|---|---|---|---|---|
| Slowly | iOS/Android | 2017 | Official site claims 10M+ users | Global penpals, letters delivered with a delay based on distance, you select people and build a profile, long letters. のり only runs one Korea-Japan line, random matching, one photo and one sentence, no profiles. |
| Daily Postcard / 오늘도 엽서 (GH Planet, Korea) | iOS/Android | 2018-09 | iOS JP 11 ratings, KR 84 (iTunes) | The mechanism is nearly identical: photo + one sentence, global random matching, built-in translation, and a "postman bird" to deliver. The difference is that it targets the whole world and hasn't taken off in years; のり covers only Korea and Japan and reinforces the "across the sea" feeling with postmarks and city names. |
| HelloTalk | iOS/Android | 2012 | JP 60.6k ratings, KR 47.5k; top 5 on JP/KR social Top Grossing (library) | A language-exchange IM with real-time chat, DMs, and flirting issues. のり deliberately skips DMs and chat. |
| Tandem / Maum | iOS/Android | 2015 / 2022 | Tandem JP 16k ratings | Language matching plus voice calls, with the burden of study tasks |
| A batch of Japan-Korea exchange apps from 2026: hanil, ハル, Hana, 히토비토, セオト, Dailying, 펜팔 진심 | iOS | 2026-03~10 | Rating 0~8 (library) | Mostly "Japan-Korea dating / language exchange + translated chat". Basically chat and matching, and none of them took off. |
| Postcrossing | Web/app | 2005 | Global community of physical postcards | Physical postcards cost money and take ages to arrive; のり is digital and delivers the same day |
| Bottled / Song Bottle and other message-in-a-bottle apps | iOS | Mixed | Small | Message-in-a-bottle apps have no country targeting. Japanese users themselves describe のり as "the online version of a bottle mail" (ボトルメールのネット版). |
Key point: "photo postcard + random stranger + translation" is not a new idea. Daily Postcard did it 2018 years ago and never took off. What's different about のり is that it only connects Korea and Japan, plus a more restrained, more designed tone.
3. Where users came from (by time)
- Self-posted in communities (confirmed): 10-26 posted the launch on VibeCrew, a Korean indie dev community (62 views); 10-31 posted in the 루리웹 "App/Indie Promotion" board (137 views); 11-02 posted an update on VibeCrew; they also set up a product page on Disquiet. Volume was tiny, not a major source.
- Organic post on Japanese X (confirmed, the most important signal): @mayuloves2min (a Japanese SHINee fan who posts a lot of cats and daily life)10-27 posted: 「のり / 노리というサービスが最近の癒し……ボトルメールのネット版みたいな」(Noli has been my healing lately... like a web version of message-in-a-bottle), attaching 3 screenshots. 190.2K views, 537 reposts, 3.6K likes, 1.9K bookmarks. 10-30 She followed up with "the iPhone version is out first" and quote-tweeted the official account. The timing lines up exactly with "10-26 Japanese 80 people → 11-02 Japanese 1,600 people." No sign of paid partnership, so we judge it as organic sharing.
- Official account posting consistently (confirmed): X @erika28528593 (display name 「하루키」, account registered 2023 years ago, 1,012 posts) posts product copy, development progress ("우표 시스템을 만들고 있어요" / "I'm building the stamp system"), and user milestones, using the hashtags #노리 #のり便. It also reposts Japanese users' experiences, such as @takatsuki_smk 11-01.
- Official Instagram @nori_daily_ (confirmed): about 106 followers, 14 posts. Posts animated shorts of the little cat 「노리」 carrying letters across the sea (10-27 "two weeks, 758 postcards", 11-01 "Seoul 08:10, Osaka is 08:10 too"), synced to YouTube Shorts. Volume is small.
- Reply-driven traffic on Threads (confirmed): the Threads account 「지우」 (@dgu285285932026, the name matches the developer 오지우) replied under a post saying "I want Japanese friends, but none of the Japan-Korea exchange apps I tried worked" with 「이거 한번 써주세요!! 딱 일상 공유용이에요!!」 (Try this one!! It's perfect for sharing everyday life!!) and an App Store link. The developer was actively finding people with this need and covering the Korean side.
- TikTok: found an introduction video from a Japanese user (user6676595599675, 「韓国の知らない人と郵便でつながる方法」, "how to connect by mail with strangers in Korea"). View count unknown. A TikHub keyword search turned up no videos with meaningful views.
- Not found: no evidence of paid ads, creator partnerships, media coverage, ASO paid acquisition, or free promotions to climb the charts. KR went from 11-05 to 11-06, climbing from #89 to #13; I couldn't find what drove it. The Korean free social chart has a low bar, and a few dozen downloads can push an app up.
- Early praise: KR store, 10-29 to 10-31, 5 consecutive 5-star reviews with similar wording. Possibly from the developer's circle or early web users, and possibly solicited. Unverified.
4. Why it took off
- Timing and demand: Korean wave fandom in Japan and Japanese travel interest in Korea are both high, Japan and Korea share zero time difference (the official IG uses this in its copy), and the need for "an ordinary person's daily life from the other country" is real. Existing tools are mostly chat and dating apps like HelloTalk, with heavy DM harassment and social pressure. のり reduces "exchange" to a one-way postcard, so the barrier is nearly zero.
- The product itself is shareable content: the look of the postcard, the city postmarks, and the cat mascot make screenshots pretty and "healing", so users want to post them. That viral tweet was 3 screenshots plus the words 「癒し」.
- Scarcity builds anticipation: 3 stamps per day, send one, receive one. User reviews say things like "the stamps feel a bit limiting, but that's part of the charm" and "looking forward to tomorrow", which naturally gives people a reason to come back every day (retention logic).
- AI translation plus AI moderation: translation removes the language barrier; all photos are reviewed before delivery, and anything with faces or contact info is blocked, so users feel it's "safe". The developer admits the AI moderation wrongly banned some users and later changed it so accounts aren't banned by AI alone.
- Web first, app later: cold-started with a web version on Cloudflare Pages (Android and PC still use the web version), validated it, then shipped iOS, catching the traffic from the viral tweet.
5. Differentiation
- Only one line: Korea-Japan. The two countries share zero time difference and like each other, and city names on the postmarks (Osaka, Fukuoka, Gyeongbuk) create a real sense of "across the sea".
- Deliberately no chat, DMs, follows, or timeline. Only postcards, which is the opposite of HelloTalk, Tandem, and dating apps.
- Scarce stamps and a slow pace follow the same idea as Slowly's "delayed delivery", but a single photo with one line is much lighter than writing a long letter.
- Compared with Daily Postcard: the mechanics are nearly identical, and it didn't take off in 8 years. So the growth didn't come from the "postcard exchange" mechanic itself, but from positioning (only Korea-Japan) + design + one organic spread through the Japanese fan circle. Differentiation is a prerequisite for spreading, but the tweet that lit the fuse was partly luck.
6. Revenue and exposure
- Subscription ノリ Plus: ¥480 / month or ₩4,400, benefits include replies within 30 days, letter stickers, seasonal postmarks, 2 extra stamps per day, and widgets. It has never charted on any top-grossing list, and revenue is negligible.
- No public revenue, no media coverage, nothing found in the x-radar corpus. Only one viral Japanese tweet plus a few developer posts in small Korean communities. It's "spreading within small circles".
- Copycats: none directly copying it so far. But 2026 already saw a batch of Japan-Korea exchange apps (see the competitor table), which shows many people are testing this track.
7. What's worth borrowing
- "Targeted random exchange" between two countries or two groups tells a better story and spreads better than global random.
- Splitting "chat" into "one card at a time" lowers social pressure; scarce stamps give a reason to come back daily, and what you pay for is simply "a few more stamps".
- The UI itself has to be pretty enough to screenshot and share (postmarks, mascot, postcard texture).
- When supply and demand are unbalanced on each side, the developer goes into the other country's communities and Threads replies to fill that side.
- Cold-start on the web version and ship iOS later; for Android, the web version carries the load in the meantime.
8. What's still uncertain
- Retention: whether the scarcity mechanic keeps people once the novelty fades; Japanese users are 3 times the Korean ones, so Korean postcards may not be enough and could hurt the experience.
- Why KR climbed from 11-06 to #13 (possibly the developer's promotion in Korea, or the Korean chart's low bar).
- Whether the early KR 5-star reviews were solicited.
- Subscription conversion, and whether ¥480 per month can cover AI translation and moderation costs.
- Whether the viral tweet was entirely organic (the author is a long-time K-pop fan, with no visible commercial relationship).
Sources
- App Store: apps.apple.com/jp/app/id6823844486, apps.apple.com/kr/app/id6823844486 (iTunes lookup, 2026-11-06)
- Website: noriapp.pages.dev/; web version noriapp-web.pages.dev/
- VibeCrew launch post (10-26, 80 Japanese users): vibecrew.kr/ship/11402
- VibeCrew update post (11-02, Japan 1,600 / Korea 430, #176 in JP Social): vibecrew.kr/ship/11757
- 루리웹 developer post (10-31, about 1,500 Japanese users): m.ruliweb.com/mobile/board/300034/read/301024
- Viral Japanese tweet (10-27,190.2K views): x.com/mayuloves2min/status/2115197605278027834
- Official account: x.com/erika28528593
- Instagram: www.instagram.com/nori_daily_/, www.instagram.com/reel/DfAHlecTyp9/
- Threads reply: www.threads.com/@dgu285285932026/post/DfMSp86mbzQ
- Disquiet:disquiet.io/products/64902f70-05e7-4a55-8fa5-04456e3c9bfc
- Competitors: Daily Postcard apps.apple.com/us/app/daily-postcard/id1435016554; Slowly slowly.app/; library appstore.app_profile (jp/kr, 2026-11-06)