What a 'interview practice' app really is: it ranks #22 on Japan's Business bestseller chart, but it sells per-minute video companionship
What it is A Japanese adult video-companionship app dressed up as 'mock video interviews.' Male users buy points to message and video-chat with female hosts, at roughly ¥300–400 per minute of video.
Why it took off It put high-ticket video companionship into a low-barrier Business category, so a few dozen heavy payers were enough to push it onto the bestseller chart. Add disguised app review approval, re-listing after takedowns, and points-for-reviews, and you have the rest.
EHow you could follow it Don't copy it. The only thing worth learning: for a legitimate high-paying product, picking a niche category lets a small number of paying users buy chart exposure. Its store copy's 'real-person mutual interview practice' is also an unclaimed gap nobody has seriously built. You could test that as a new product.
- Data (updated daily) · first listed 2026-10-08 · Japan rating 94 · charted in 11-08 of 1 stores
iOS · best category chart rank · by store Data 2026-10-28 → 2026-11-08 (12 days, 12 observations). Lower rank is higher; gaps mean it wasn't charted that dayiOS · rating count · Japan Data 2026-10-28 → 2026-11-08 (12 days, 12 observations). Apple doesn't publish download counts; rating growth is a proxy for downloads.
On Japan's App Store there's an app called coco+ (ココプラス). Its store page says it lets job seekers take turns playing interviewer and practice mock interviews over video. Once you install it, though, what you see is a full screen of companion hosts, and right after signing up, hundreds of messages flood in. It has only 84 ratings, yet it has charted at #19 to #27 on Japan's Business bestseller list. Below: what it actually is, why it charts, where the money comes from, and why you shouldn't follow this business.
Two minutes after signup, 94 messages
In 2026 Oct 30, the author of a Japanese dating-app review blog installed coco+. He started signing up at 9:51. The profile page doesn't ask whether you want first-round or final-round interviews; it's all sexual-preference options. After filling out the profile, at 9:53 he first opened the home screen, and 94 messages were already waiting in the inbox. He wrote in the article: 'This is obviously not an interview app. It's what's called ライブチャット (live video chat).' He couldn't screenshot inside the app, so he filmed it with a second phone.
A week earlier (10-23), another review blog also signed up and tested it. It said that within minutes it received over 200 messages, sent by チャットレディ (companion hosts), and some avatars looked AI-generated. Signup required no age or identity verification. Both articles say there's no interview-related feature anywhere in the app.
Yet its store description reads convincingly: post to find practice partners, use messages to set times, enter a video room 5 minutes before the session, draw question cards by 'first round / final round / online interview,' rate each other after practice on five items ('lead with the conclusion,' 'speaking speed,' 'volume,' 'eye contact,' 'specificity'), and chart nervousness over time. Category is 'Business,' rating 17+, developer is an individual account, Tomoya Yamaguchi, who has only this one app, listed in Oct 8.
Where the money comes from: ¥300 to ¥400+ per minute
All the money is paid by male users buying points. Based on the prices the review blogs measured (10-23):
| Project | Pricing |
|---|---|
| Top-up | ¥480 = 250pt; up to ¥10,000 = 7,500pt |
| Send a message | 60pt |
| Video call | 230pt / minute (about ¥307–442, depending on the top-up tier) |
| Watch a livestream | 200pt / minute |
| View photos / view videos | 75pt / 120pt |
A 10-minute video call costs ¥3,000 to ¥4,400. Right after signup you're surrounded by hundreds of messages, and every reply costs points. That's the conversion funnel. Another review also notes that when buying points, the credit card statement shows 'JUMBO.K.K,' but the app never names the operating company and has none of the Specified Commercial Transactions Act disclosures Japanese law requires.
The App Store reviews line up too (10-11 to 11-04, 36 in total): 'Matched right away, amazing,' 'chatted about all sorts of topics with cute people,' 'the evenings were fun.' The negative ones say 'it's all fake, plainly,' 'points are too expensive.' Only 1 of 36 mention 'interview prep.'
Why 84 ratings is enough to reach the top grossing chart
The key is the category it picked. The bar on Japan's Business bestseller chart is low; the top ~20 spots can be reached with a few dozen heavy spenders (inference). Compare an app using the same playbook but honestly listed under Social:
| App | Launched | Score | Bestseller rank (11-06) |
|---|---|---|---|
| coco+ (interview shell, Business) | 2026-10-08 | 84 | Business #22 |
| ビデオ通話 ソラ (Social) | 2025-08-17 | 4,507 | Social #25 |
| MIYABI+ ビデオ通話 (Social) | 2026-04-10 | 1,200 | Social #33 |
| ビデオ通話 Carina 見せあい | 2026-04-15 | 460 | Social #35 |
(App Store Japan data, 11-06)
In Social you need thousands of ratings to squeeze into the top 30; in Business, under a hundred is enough. Charting doesn't mean it earns much. It only means the category it chose has little competition. It doesn't appear on the overall charts (free or grossing), and it has only charted in Japan.
The ratings are odd too. It collected 20 in its first 51 days after launch, then 9 more in the next 33 days, with 11-06 alone adding 14 in one day, average 4.49. Reviews repeat 'lots of free points,' 'looks like you can get 50 points,' 'I wish the daily free points were bigger,' along with a string of empty five-star reviews like 'いいねいいねいいね' and '最高ーーー.' Points-for-reviews is a strong suspicion (inference, no direct evidence).
It isn't one app, it's an assembly line
coco+ is not an isolated case. On Japan's App Store there are over 50 apps using the same naming pattern: 'ビデオ通話で + some legitimate purpose + 見せ合い (showing each other)'. Examples: Sakura, for watching each other's workouts over video (849 ratings); KAKERU, for watching each other run (829 ratings); パパイヤ, for practicing posture; Contact, for event management, and more. Most are listed under individual developer accounts, and most have fewer than 10 ratings. In October alone, several new shells appeared: ジョーカー, Contact, カシュー.
On Yahoo Chiebukuro, someone answered in 2025 August about where these apps go: 'The mutual-viewing apps were deleted once, but they came back under new names and icons. You can't find them with normal search.' Users find them through navigation sites that regularly swap links (I didn't find a page pointing directly to coco+).
I found no ads or discussion promoting coco+ in the Meta Ad Library, TikTok, or X (not finding them doesn't mean none were run). The only exposure I can see is the two review articles above, both written by dating-app affiliate blogs, titled 'is it fake?', with promo links to other dating apps at the bottom.
Who it's competing with
- Clone shell apps using the same template: ソラ, MIYABI+, Sakura, KAKERU, Carina. Their experience is identical to coco+: point-based, companion hosts, new users bombarded with messages. The only difference coco+ has is the 'interview / business' shell on top.
- Licensed video-companion websites: チャットピア, マダムライブ, エンジェルライブ, FAMU, etc. They have operating companies and public licensing notices, and they drive traffic through adult affiliate ranking sites. Scale unverified.
- Real interview-practice apps: 面接練習AI, steach, カチメン, Mentor AI, etc. They're AI practice partners or self-recording tools. They're not the same market as coco+, which just borrowed the category's name.
If it were you
One-line verdict: don't follow it. This business makes money from disguised review approval, re-listing after takedowns, and shills, and the product itself has nothing. Copying it means violating listing rules, and you'd bear the Japanese legal issues and the risk of account bans yourself.
Who it fits: no kind of indie developer should copy it. The only lesson worth taking: the bar for bestseller charts varies enormously across categories. If you have a legitimate high-paying product (per-session consulting, practice coaching, courses) and its real function genuinely belongs in a niche category, choosing the right category can buy chart exposure with very few paying users. The condition is that the store listing matches what the app actually does.
Who it doesn't fit: anyone who wants to build 'video companionship.' If you really want to do it, the path is a licensed website plus affiliate-driven traffic. That requires a registered company, age verification, notification to the police for online matchmaking businesses, and clear Specified Commercial Transactions Act disclosures. It's a different business from coco+, and its playbook doesn't apply.
The gap it leaves behind: the product described in its store copy, where job seekers take turns as interviewers, practice over video, and rate each other afterward, has never been seriously built in Japan. coco+ only wrote it to pass review. If you want to try it, validate it as a new product: first recruit 50 people in career-change communities for practice sessions, then see how many come back in week two (inference: this is the biggest open question. Existing interview apps all go with AI self-practice, which may be exactly because real-person practice is hard to schedule).
What would show I got this wrong: if clone apps like coco+ stay steadily on the Business and Social bestseller charts six months from now without bulk removal, it would mean Apple is passively allowing this kind of disguise, and the risk is smaller than described here. But that would only make this path more crowded, not more suitable for indie developers.
Research notes: competitor table, acquisition evidence, full research report
- Competitors
Name Where Launched Scale How it differs from this one ビデオ通話 ソラ iOS 2025-08-17 JP 4,507 ratings, 7 days +139, best Social bestseller rank #22 (appstore library 11-06) The same kind of adult video chat, listed honestly under Social with much larger scale; coco+ swaps in an interview/business shell MIYABI+ ビデオ通話 iOS 2026-04-10 jp 1,200 ratings, Social Top Grossing #7 (287 days +33) Same model, Social category; coco+ adds one more layer by disguising itself as interview practice ビデオ通話で筋トレ見せあい - Sakura iOS 2026-03-31 JP 849 ratings, best Entertainment bestseller rank #66 Same disguise tactic, fitness shell; coco+ uses an interview shell ビデオ通話-KAKERU 見せ合いランニング iOS 2026-03-25 JP 829 ratings, Social bestseller #52 Same template, running shell チャットピア / マダムライブ / エンジェルライブ / FAMU and other licensed live-chat sites Web Multi-year established sites Unverified; long-term top placements on affiliate ranking sites Operated by a registered company with licensing disclosures, driving traffic through affiliate links; coco+ has no operator info and gets into the store by disguise Interview practice AI / steach / カチメン / Mentor AI and others iOS 2022–2026 Small (面接練習AI is also in Business) Real AI or self-recording interview tools; coco+ just borrows the category name and has no actual interview feature - Where users come from
- 查实 伪装分类过审 + 换壳重上:商店描述是面试练习,hibana、lovematching 实测是成人视频聊天;同模板 50 多个个人账号 App;知恵袋 2025-08:见せ合いアプリ被删后“名前やアイコンを変えて復活”
- Inferred Niche navigation sites / affiliate traffic: Chiebukuro answers point to 見せ合い navigation sites that rotate links regularly; adult affiliate ranking sites exist; found no page listing coco+ directly
- Verified Search exposure from review blogs: dedicated articles at hibana.rgr.jp 10-23 and lovematching.jp 10-30
- Inferred Giving away points in exchange for reviews: reviews like 'lots of free points, happy' and 'you'll get 50 for free apparently' and 'please increase the daily point grants', plus lots of empty five-star ratings
- Inferred Paid ads (Meta / TikTok / X): Meta Ad Library shows no advertiser landing on this id; nothing found on TikTok or X. Not finding it doesn't mean they didn't spend.
coco+ (ココプラス): a Japanese paid live video chat (ライブチャット) app dressed up as an 'interview practice' app
- App Store: apps.apple.com/jp/app/id6817950981; developer account Tomoya Yamaguchi (personal account, with only 1 app under their name); 2026-10-08 listed, Japanese only, rated 17+, Business category, free with in-app purchases; current version 1.2 (2026-10-21).
- Research date 2026-11-06.
Bottom line
It isn't an interview-prep app. The store page says "career changers role-play interviews with each other, video mock interviews," but once you download it, it's a point-based adult live chat for men, text and video chat with "チャットレディ" (chat ladies). It charts at #19–27 on Japan's Business Top Grossing list for three reasons: the Business category's bar is low; paid adult video chat earns a lot per user (video at 230pt/min, about ¥307–442); and the distribution playbook is disguising the app to pass review, then relisting it under a new shell. The product itself has no real differentiation. It's the distribution playbook that makes it run: a disguised category, community referrals, and free points traded for good reviews.
1. What it actually is (evidence)
- Two Japanese dating/adult app review blogs, after actually signing up and testing, reached the same conclusion:
- hibana.rgr.jp (2026-10-23): 'Introduced as an interview practice app, but it was just a fake video call app.' Within minutes of signing up, 200+ messages arrived from チャットレディ and apparent AI avatars. No age or identity verification was needed to register. No interview practice feature was found. hibana.rgr.jp/coco-plus/
- lovematching.jp (2026-10-30): the signup profile page is all fetish options; within 2 minutes, 94–100 messages flooded in, judged to be a 'live chat / video chat' service. No operator company info, no Specified Commercial Transactions Act disclosure, no expected licensing notice. When buying points, it shows 'JUMBO.K.K' on the statement. Terms of service are posted on note. lovematching.jp/14889/
- Pricing (tested on hibana): top-up ¥480 = 250pt up to ¥10,000 = 7,500pt; messages 60pt each; video call 230pt/min (about ¥307–442); live stream viewing 200pt/min; photos 75pt; videos 120pt. A 10-minute video call costs about ¥3,000–4,400.
- Reviews in our App Store library (jp, 2026-10-11 to 11-04, 36 total) corroborate this: 'Matched right away, the best', 'Chatting with cute people about all sorts of things is the best', 'Nighttime is fun', 'They show you the lower half too', 'Lots of free points, happy', 'Please increase the daily point grants'; negative reviews: 'Honestly there are only 🌸 (sakura, i.e. paid shills)', 'Points are expensive'. Only 1 of 36 reviews mention 'interview prep'.
2. Data (appstore library, jp)
| Date | Business category Top Grossing rank | Total ratings | New today |
|---|---|---|---|
| 10-28 | 25 | 51 | – |
| 10-29 | 19 | 51 | 0 |
| 11-01 | 22 | 60 | 5 |
| 11-04 | 27 | 64 | 1 |
| 11-05 | 20 | 70 | 6 |
| 11-06 | 22 | 84 | 14 |
- Charted only in Japan. Not on the overall charts (free or grossing); only on the Business category Top Grossing chart and one other category chart (n_charts=2).
- Average rating 4.49 (iTunes lookup 2026-11-06). After 20 days it had 51 ratings, then gained 33 more over the next 9 days, 11-06 with +14 in a single day. Reviews repeatedly mention 'free points', 'daily point grants', and 'you'll get 50 for free apparently', highly suspected to be points-for-five-star-reviews (incentivized ratings); lots of empty five-star reviews like 'いいねいいね' and '最高ーーー' point the same way.
- Near #20 on Japan's Business category Top Grossing chart, a far lower bar than social or entertainment. In the same library, the biggest lookalike, 'ビデオ通話 ソラ', has 4,507 ratings and ranks #25 on the Social Top Grossing chart; 'MIYABI+' has 1,200 ratings and ranks #33 on Social Top Grossing. coco+ reached #22 on Business with only 84 ratings, mainly because it picked a low-bar category; this doesn't indicate especially large revenue.
3. Competitors: the real competitors aren't interview apps, they're adult video chat apps
A. Same-template lookalikes (App Store Japan, personal developer accounts, names follow 'ビデオ通話で + some legitimate purpose + 見せ合い'), appstore library 2026-11-06:
- ビデオ通話 ソラ (Assist Inc., 2025-08-17): 4,507 ratings, +139 in 7 days, best rank #22 on Social Top Grossing
- MIYABI+ ビデオ通話 (Momoka Kobayashi, 2026-04-10): 1,200 ratings, +287 in 7 days, #33 on Social Top Grossing
- ビデオ通話で筋トレ見せあい - Sakura (Naoki Mashimo, 2026-03-31): 849 ratings, best rank #66 on Entertainment Top Grossing. An outside review site describes it as a fitness app where you 'show your form with a pro trainer', with 10 in-app purchase tiers from ¥480–29,800
- ビデオ通話-KAKERU 見せ合いランニング (Hiromi Koizumi, 2026-03-25): 829 ratings, #52 on Social Top Grossing
- ビデオ通話 Carina 見せあい (2026-04-15): 460 ratings, #35 on Social Top Grossing
- パパイヤ (pose practice, 9-14), シロップ (9-18), ジョーカー (10-01), ビデオ通話でイベント管理 - Contact (10-05, #127 on Lifestyle Top Grossing), カシュー (10-27)... The same naming scheme appears 50 times between 2025-06 and 2026-11, most with fewer than 10 ratings, which suggests mass listing.
- A parallel app, 'ココハナ | 大人のお悩み掲示板' (ARMS Inc., 9-27, #15 on Lifestyle Top Grossing), is another shell disguised as a consultation/message board.
B. Licensed, legitimate live chat sites/apps: チャットピア, マダムライブ, エンジェルライブ, FAMU, モコム, KANADE, etc. All have operating companies and licensing disclosures, and drive traffic through affiliate ranking sites (app-buzz.com/miseai/rank, the 2026 rankings on videolivelife.com). Scale not verified.
C. Nominal competitors: the real interview practice apps: 面接練習AI (TAKAYUKI HASHIMOTO, 2026-03, also in Business), steach (JAIC, 2022), カチメン (CAC, 2023), Mentor AI (2026-04), 面接リプ, OXEZ, etc. These are AI self-practice or solo recording tools. They aren't in the same market as coco+, which only borrows the category's name.
The store pitch of 'real people taking turns as interviewers, mock video interviews' hasn't been done by anyone else, but coco+ doesn't actually implement it, so it isn't a differentiator.
4. Growth tactics
| Channel | Evidence | Confirmed? |
|---|---|---|
| Disguised to pass review + rebrand and relaunch (category mismatch) | The store listing calls it an interview practice app, but in testing it turns out to be an adult video chat app. Same template, "ビデオ通話で〇〇見せ合い"50 across multiple individual developer accounts' apps; a Chiebukuro 2025-08 answer says: "The apps for showing each other were removed for now, but they're back under different names and icons. They're set up so you can't find them with a normal search." | Confirmed (pattern); whether coco+ and the other shells share an operator is unverified |
| In-community traffic / rotating-link navigation pages | A Chiebukuro answer points to dedicated 見せ合い navigation sites (a super-koike.com subdomain, 'changes regularly'); adult affiliate ranking sites have existed for a long time. Found no page listing coco+ directly. | Not confirmed for coco+ itself |
| Review blogs (reverse exposure) | Two 'sakura?' articles on hibana (10-23) and lovematching (10-30); they are dating affiliate sites themselves, and they bring search traffic to the app name. | Articles confirmed; how much traffic they bring is unknown |
| Points-for-reviews | Reviews like 'lots of free points, happy', 'you'll get 50 for free apparently', 'daily point grants', plus lots of empty five-star ratings. | Highly suspected, not directly confirmed |
| Paid ads | Meta Ad Library has no advertiser landing on this id (it only tracks a keyword list; not finding it doesn't mean they didn't spend); searching TikTok for 'ココプラス アプリ' found no related videos; X local corpus: 60 posts in 0 days. | Not found |
| Organic store search | The name packs two keyword groups, 'ビデオ通話' and '面接練習', to get found in search while using legitimate words to pass review. | Inferred |
Where the money comes from: men buy points (IAP), charged per message/minute; チャットレディ get a revenue share. New users are immediately hit with a flood of messages, which pushes replies and calls; ARPPU is very high. So even with few ratings it can reach the category grossing chart.
5. Why it took off
- Category pick: list an adult video-chat app under Business. The Japan store's Business Top Grossing #20 bar is low, a few dozen heavy paying users may be enough (inferred: the same template needs thousands of ratings to chart #20 in Social).
- The monetization model for adult video chat has very high per-user spend (230pt/min), and the 'flood of 200 messages' for new users converts strongly (tested on hibana and lovematching).
- Passing review by disguise: personal developer account, a legitimate-sounding name plus a 17+ rating at launch. When pulled, change the name and icon and relaunch. coco+ is one shell in this disguised-app pipeline.
- Incentivizing reviews and giving away points, pushing the average to 4.49 while ratings are still few to lower the store page's bounce rate (inferred).
6. Differentiation
No product-level differentiation. The core experience is identical to MIYABI+, ソラ, Sakura and KAKERU: point-based, チャットレディ, new-user message floods. The only 'difference' is the shell, 'interview practice / Business'. That shell is indeed why it can reach the Business grossing chart, but that's category arbitrage and review evasion, not user value.
7. Visibility and copycats
- Revenue hasn't been disclosed. It has only been covered in Japanese dating/adult review blogs (2 articles, all negative); no discussion on X or TikTok.
- It's a follower itself: the same-template lookalikes existed by mid-2025, and by 2026-10 the same month new shells like Contact, ジョーカー and カシュー had also launched.
8. What others can borrow
- The legitimate part: spot the 'category bar × per-user spend' gap first. A high-ARPPU product placed in a low-competition category can get grossing-chart exposure.
- Not recommended to copy: disguised listings violate App Store Review Guideline 2.3 (accurate metadata) and 2.5.19 (hidden features), and also violate Japan's Specified Commercial Transactions Act and the filing requirements for online opposite-sex introduction businesses. Shells can be pulled at any time, and developer accounts can be banned. This isn't a legitimate business you can replicate.
9. Still unclear
- Actual revenue scale and download counts; whether coco+ and the other 'ビデオ通話で〇〇' shells share an operator (what entity JUMBO.K.K is, unverified).
- We can't find direct evidence of which navigation site or private channel users come through.
- 11-06 daily +14 ratings: is it a promo campaign or review farming?
- How long can this shell last? (Apps of this type have historically been pulled and relaunched under a new shell.)
Sources
- iTunes lookup id=6817950981(2026-11-06)
- Our App Store library: app_day / app_profile / review (jp, 2026-10-28 to 11-06)
- hibana.rgr.jp/coco-plus/ (2026-10-23)
- lovematching.jp/14889/ (2026-10-30)
- detail.chiebukuro.yahoo.co.jp/qa/question_detail/q1131839038… (2025-08)
- datingappnotes.com/articles/sakura/, app-buzz.com/miseai/rank/, videolivelife.com/blog-entry-995.html
- metaads library (no app_link match), x-radar (60 days, 0 posts), TikHub TikTok search (nothing relevant)