Coban: Learn Japanese

Akira NOGUCHI · iOS

Coban: Learn Japanese

Explore the ad evidence, study the storefront, and build your next acquisition hypothesis.

Paid-ad activity not yet verified
Compare appsMy watchlist

01 / Creative research

Turn the unknowns into a research plan.

01

Check the acquisition promise

Read the store headline, screenshots and description. What problem is the app promising to solve?

Study the storefront ↗
02

Look for ad evidence

Explore apps with direct store-link matches. Compare their hooks and formats without assuming the same approach works here.

Browse observed advertisers ↗
03

Separate demand from paid growth

Store rankings and revenue estimates describe market context. They do not establish ad spend, conversions or ROAS.

Review the market context ↗

02 / Storefront & product

Where the click lands.

Study the product story and store experience behind the acquisition funnel.

Screenshots

Coban: Learn Japanese screenshot 1Coban: Learn Japanese screenshot 2Coban: Learn Japanese screenshot 3Coban: Learn Japanese screenshot 4Coban: Learn Japanese screenshot 5Coban: Learn Japanese screenshot 6Coban: Learn Japanese screenshot 7Coban: Learn Japanese screenshot 8

03 / Market context

The business behind the app.

Keep revenue, downloads and store rankings separate from advertising performance.

How Much Does Coban: Learn Japanese Make?

Monthly Revenue
$1.0K
Annualized estimate
$12.0K
Per Download
$1.00

Platform Performance

🍎iOS
Revenue
$1.0K
Downloads
1.0K
Rating
4.8 ★(613)

Rating Distribution

4.8
★★★★★
613 reviews
5
1%
4
0%
3
3%
2
10%
1
85%

Top Countries

🇱🇰 LK🇺🇸 US🇫🇷 FR
Reviews (3)▼
★★★★☆Dat dawg person9/12/2021
Almost great with glaring problems

While this app does appear to be one of the best sources for learning the grammar of N5 specifically, and I plan on using it for that, I think it has tons of issues that hopefully can be hammered out with future updates. There are tons of performance issues/glitches when navigating the menus particularly when exiting a lesson. I think vocabulary could be made all around better for learning by not making it multiple choice, or at least having the option to do that. Also it seems reviewing vocabulary is likely a huge pain since you have to manually add words to create your own review list, and without doing that you don’t really have any options. For grammar stuff it’s hands down the best resource I’ve found, but again, the UI doesn’t work well. I hope these issues can be fixed at some point, especially the UI problems because that’s just really bad.

★★★★★Smealek7/15/2021
Amazing start looking forward to updates

Anyone around JlptN5 level and learning N4 kanji should get this app, basically absolute beginners. I wish I found this app earlier, so now I’m just waiting for it to update with N4 grammar breakdowns, and N3 hopefully. Other than that very pretty app, but I do have some suggestions. First of, it isn’t working completely fluidly and does get finicky with drag and drop, and occasionally freezes stutters—I am using iPhone 12 for reference. Anyway aside from that, I think for new learners, it’s good to have an immediate learn/review button. Learn the term, and practice immediately—although I don’t mind the way it’s laid out now. Anyway great app really looking forward to an N3 update, and to really use it 🙆‍♂️ great great start.

★★★★★Lennie K.9/20/2020
Great for review as well!

I studied Japanese while in college and only had classes for beginners to the lower intermediate level. Now that I’ve graduated and I’m busy with work, I don’t have as much time to study formally like I did before. This app has been great for me. I use it for about 20 minutes a day to review the basics. I’m familiar with everything on the app, but it never hurts to strengthen your foundations. If I had to make a complaint, is that there isn’t more content! I know this is material for N5 learners but I would LOVE to see more for levels N4-N1. I also use their official website (which is how I found out about this app to begin with). I seriously enjoy the content you have to offer and hope that you’ll be expanding it all soon in the future. I wish that I had found you all sooner! <3

Version History (81)▼
4.3.19/1/2026
4.2.58/13/2026
4.2.47/2/2026
4.2.36/28/2026
4.2.26/23/2026
4.2.16/10/2026
4.2.06/9/2026
4.1.161/27/2026
4.1.1510/7/2025
4.1.149/15/2025
Available In (115 Countries)▼
🇺🇸 United States🇦🇺 Australia🇨🇦 Canada🇨🇳 China🇫🇷 France🇩🇪 Germany🇬🇧 United Kingdom🇮🇹 Italy🇯🇵 Japan🇰🇷 South Korea🇷🇺 Russia🇩🇿 DZ🇦🇴 AO🇦🇷 Argentina🇦🇹 Austria🇦🇿 AZ🇧🇧 BB🇧🇾 BY🇧🇪 Belgium🇧🇲 BM🇧🇷 Brazil🇧🇬 Bulgaria🇨🇱 Chile🇨🇴 Colombia🇨🇷 CR🇭🇷 Croatia🇨🇿 Czech Republic🇩🇰 Denmark🇩🇴 DO🇪🇨 EC🇪🇬 Egypt🇸🇻 SV🇫🇮 Finland🇬🇭 GH🇬🇷 Greece🇬🇹 GT🇭🇰 Hong Kong🇭🇺 Hungary🇮🇳 India🇮🇩 Indonesia🇮🇪 Ireland🇮🇱 Israel🇰🇿 KZ🇰🇪 Kenya🇰🇼 KW🇱🇧 LB🇱🇹 Lithuania🇱🇺 LU🇲🇴 MO🇲🇬 MG🇲🇾 Malaysia🇲🇽 Mexico🇳🇱 Netherlands🇳🇿 New Zealand🇳🇬 Nigeria🇳🇴 Norway🇴🇲 OM🇵🇰 Pakistan🇵🇦 PA🇵🇪 Peru🇵🇭 Philippines🇵🇱 Poland🇵🇹 Portugal🇶🇦 QA🇷🇴 Romania🇸🇦 Saudi Arabia🇸🇬 Singapore🇸🇰 Slovakia🇸🇮 Slovenia🇿🇦 South Africa🇪🇸 Spain🇱🇰 LK🇸🇪 Sweden🇨🇭 Switzerland🇹🇼 Taiwan🇹🇭 Thailand🇹🇳 TN🇹🇷 Turkey🇺🇦 Ukraine🇦🇪 UAE🇺🇾 UY🇺🇿 UZ🇻🇪 VE🇻🇳 Vietnam🇧🇴 BO🇰🇭 KH🇪🇪 Estonia🇱🇻 Latvia🇳🇮 NI🇵🇾 PY🇦🇫 AF🇬🇪 GE🇮🇶 IQ🇱🇾 LY🇲🇦 MA🇲🇿 MZ🇲🇲 MM🇾🇪 YE🇧🇭 BH🇨🇾 CY🇲🇹 MT🇷🇸 RS🇧🇯 BJ🇧🇫 BF🇨🇲 CM🇨🇬 CG🇨🇮 CI🇯🇴 JO🇱🇦 LA🇲🇱 ML🇸🇳 SN🇹🇿 TZ🇺🇬 UG🇿🇲 ZM🇿🇼 ZW
Supported Languages (11)▼
EnglishFrenchGermanItalianKoreanPolishPortugueseRussianChineseSpanishTW
App Details▼

“Coban” is a Japanese learning app designed to help learners study everything from JLPT N5 to N1 within a single app. Rather than focusing only on pas...

iOS App ID
1506009508
Content Rating
4+
Min OS
16.0
Size
634.1 MB
In-App Purchases
Yes
Publisher
Akira NOGUCHI

In-App Purchases (5)

NamePriceType
Premium User (Monthly)$6.99Monthly
Premium User (6 Month)$39.90Semi-Annual
Premium User (Annual)$59.99Yearly
Lifetime Upgrade$59.99One-time
Lifetime Access$99.99One-time