Kaeru - Learn Japanese & Kanji

Rozemyne Ltd · iOS

Kaeru - Learn Japanese & Kanji

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

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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

Kaeru - Learn Japanese & Kanji screenshot 1Kaeru - Learn Japanese & Kanji screenshot 2Kaeru - Learn Japanese & Kanji screenshot 3Kaeru - Learn Japanese & Kanji screenshot 4Kaeru - Learn Japanese & Kanji screenshot 5Kaeru - Learn Japanese & Kanji screenshot 6Kaeru - Learn Japanese & Kanji screenshot 7Kaeru - Learn Japanese & Kanji screenshot 8

03 / Market context

The business behind the app.

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

How Much Does Kaeru - Learn Japanese & Kanji Make?

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

Platform Performance

🍎iOS
Revenue
$1.0K
Downloads
1.0K
Rating
3.9 ★(29)

Rating Distribution

3.9
★★★★☆
29 reviews
5
7%
4
17%
3
10%
2
14%
1
52%

Top Countries

🇹🇼 TW🇯🇵 JP🇸🇬 SG
Reviews (3)▼
★★☆☆☆Matzaball8/5/2026
I wanted to love this app

Has some potential, but the daily exercises have some inaccuracies that shouldn’t be there and the vocab training with kanji acts very strangely. Some cards have just a kanji and no associated task or prompt. The English translations are off and the voice readings are also frequently different than what’s written. And some sentences don’t make sense in Japanese or English. I also get annoyed by constantly being rated at 80% in pronunciation when my individual scores during the test are above 90%. I’m glad I only got a month subscription. Going back to Bunpo and Wanikani.

★★★☆☆Pleyfight7/14/2026
Poor Functionality

I was happy to try the app for a bit and it was working fine but now whenever I open it, it hangs on the kanji loading page. I deleted the app and reinstalled, same issues. Consistent across my iPhone and iPad. It’s a shame.

★☆☆☆☆killuawatts7/13/2026
UI leaves a lot to be desired

The app has a clean interface making you think it’s easy to use but far from it. If you want to just use it as a review before you dive into your exact it’s tedious since it makes you record the word without the ability to just automatically swipe and if you skip it makes it seem like you don’t know the word. There’s no easy access to review JLPT material but rather everything is scattered across decks in one location. Organization feels sloppy despite the clean looking interface. Feels like a trick

Version History (30)▼
1.5.37/21/2026
1.5.27/9/2026
1.5.17/7/2026
1.57/1/2026
1.4.106/27/2026
1.4.96/3/2026
1.4.85/6/2026
1.4.75/4/2026
1.4.64/29/2026
1.4.54/27/2026
Available In (111 Countries)▼
🇺🇸 United States🇦🇺 Australia🇨🇦 Canada🇨🇳 China🇫🇷 France🇩🇪 Germany🇬🇧 United Kingdom🇮🇹 Italy🇯🇵 Japan🇰🇷 South Korea🇩🇿 DZ🇦🇴 AO🇦🇷 Argentina🇦🇹 Austria🇦🇿 AZ🇧🇭 BH🇧🇾 BY🇧🇪 Belgium🇧🇷 Brazil🇧🇬 Bulgaria🇨🇱 Chile🇨🇴 Colombia🇨🇷 CR🇭🇷 Croatia🇨🇾 CY🇨🇿 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🇲🇾 Malaysia🇲🇹 MT🇲🇽 Mexico🇳🇱 Netherlands🇳🇿 New Zealand🇳🇬 Nigeria🇳🇴 Norway🇴🇲 OM🇵🇰 Pakistan🇵🇦 PA🇵🇪 Peru🇵🇭 Philippines🇵🇱 Poland🇵🇹 Portugal🇶🇦 QA🇷🇴 Romania🇸🇦 Saudi Arabia🇷🇸 RS🇸🇬 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🇬🇪 GE🇮🇶 IQ🇱🇾 LY🇲🇦 MA🇲🇿 MZ🇲🇲 MM🇾🇪 YE🇧🇯 BJ🇧🇫 BF🇨🇲 CM🇨🇬 CG🇨🇮 CI🇯🇴 JO🇱🇦 LA🇲🇱 ML🇸🇳 SN🇹🇿 TZ🇺🇬 UG🇿🇲 ZM🇿🇼 ZW🇷🇺 Russia
Supported Languages (4)▼
EnglishKoreanSpanishChinese
App Details▼

Kaeru teaches Japanese writing, grammar, and pronunciation in one app. No juggling five tools. No guessing which resource covers what. You open Kaeru...

iOS App ID
6740145807
Content Rating
4+
Min OS
18.6
Size
176.6 MB
In-App Purchases
Yes
Publisher
Rozemyne Ltd

In-App Purchases (7)

NamePriceType
Kaeru Plus: Weekly$5.99Weekly
Kaeru Plus: Weekly$5.99Weekly
Kaeru Plus: Monthly$12.99Monthly
Kaeru Plus: Montly (Monthly)$12.99Monthly
Kaeru Plus: Annual$89.99Yearly
Kaeru Annual$89.99Yearly
Kaeru Pay Once$299.99One-time