+78%visibility
+53%conversion rate
ASO Index · by aix
The ASO tool built for Japanese & Korean.
Morpheme-level keyword analysis for app stores where spaces don’t split words. Free.
3Mapps analyzed
2M+keywords analyzed daily
3languages: JA · KO · EN
100%free
Morpheme analysis
Don’t miss a single keyword.
Our own morpheme logic breaks metadata and searches into meaningful keywords — even in Japanese and Korean.
무료퍼즐게임추천“free puzzle game recommendations”
Space-based tools무료퍼즐게임추천One unknown word
ASO Index무료free퍼즐puzzle게임game추천picks
パズルゲーム無料“puzzle game free”
Space-based toolsパズルゲーム無料One unknown word
ASO Indexパズルpuzzleゲームgame無料free
猫ねこネコ1 keyword“cat”
ASO Score
One score for your whole store page.
ASO Index rates three parts of ASO and tells you which to fix first.
MKO
Metadata Keyword Optimization
Are your title and keywords ranking?
CRO
Creative Optimization
Do your icon, screenshots and video convert?
RSO
Review & Rating Optimization
Do your ratings help or hurt?
Features
Everything ASO needs, in one place.
Keyword Optimization
Find the keywords that raise your ranking.
AI keyword suggestions
Enter a brand keyword; GPT suggests related ones with search volume.
Metadata breakdown
Split your metadata into keywords — even in Japanese and Korean.
Keyword tracking
Ranking history, rank-up alerts, groups and CSV export.
Competitor keywords
See which keywords rivals put in their metadata.
Keyword simulation
Test keyword ideas before you ship an update.
Metadata localization
Localize metadata and check character counts per store.
Creative Optimization
Dress your store page to convert.
CRO score
Icon, screenshots and preview video scored at a glance.
Compare with competitors
Line up your creatives next to bookmarked rivals.
Update history
Track every creative change — no console visits needed.
Review & Rating
Listen to users and lift your rating.
Review monitoring
Rating breakdown and the latest reviews in one view.
Keyword cloud
Positive words become keywords; negative ones show what to fix.
Rating simulator
See how many 4- and 5-star ratings reach your target.
Market Insight
Read the market before you move.
Market ranking
Trends by store, country and category.
Rank ups · downs
Spot the apps climbing or falling right now.
App Explorer
Dig into any app’s profile, developer and history.
Results
Results with ASO Index.
Read the case
+225%iOS search visibility
+48%App Store impressions
Get started
From sign-up to ranking in four steps.
- 01
Add your app
Add your app and competitors with “+New”.
- 02
Pick a market
Choose the store country you want to win.
- 03
Check your score
See your ASO Score and where you lose.
- 04
Track and improve
Track keywords and watch every rank move.
Languages
Native-level for every market.
JA
Japanese
Kanji, hiragana and katakana forms grouped as one keyword.
KO
Korean
Compound searches split into meaningful words.
EN
English
Full keyword, creative and review analysis.
ASO Index API
Bring store data into your own tools.
App Store and Google Play data for Japan, Korea and the US — for your dashboards and systems.
Ask about API access- App metadata
- Creatives
- Download · sales · keyword rankings
- Reviews & ratings
- Keyword volume · difficulty
- AI keyword suggestions
Now, 100% free.
No plans, no payment details. Sign up and start.