Kotoba - 동시통역・음성 메모: iPhone vs Android
Kotoba - 동시통역・음성 메모 by (株)Kotoba Technologies Japan is on both the App Store and Google Play. Here are both versions together: downloads, users, revenue, ratings and chart positions, store by store with totals.
Rating
5.0 ★
18 ratings, both stores
Measured
Best rank now
#9
Android · 
Books & Reference Free
Books & Reference FreeMeasured
App Store
App details
App ID
6740851285
Publisher
KOTOBA TECHNOLOGIES, INC.
Minimum OS
iOS 17.6+
Content rating
4+
Languages
6
EN JA KO ZH ES ZH
Size
57 MB
Google Play
App details
App ID
jp.tech.kotoba.app
Publisher
Kotoba Technologies
Content rating
Everyone
Kotoba - 동시통역・음성 메모 downloads & installs
Both stores, worldwide. Bands are open; exact numbers are free with an account.
| Store | Downloads / day | Lifetime installs |
|---|---|---|
| iPhone | – | – |
| Google Play | – | 100k+ Measured |
| Total | – | 100k+ Confidence |
How this is calculated
iPhone: chart positions and rating growth per country, anchored on its own Android downloads; lifetime from ratings worldwide × installs per rating. Google Play: the daily change in its exact install count. The total adds every store.
Where Kotoba - 동시통역・음성 메모's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
Retention · share of new users still active
Day 1
Day 7
Day 30
Time spent · per daily user
Average time spent Pro
min a day
Sessions a day Pro
Time per session Pro
min
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
Business model: In-app purchase-led
How Kotoba - 동시통역・음성 메모 makes money: subscriptions, one-off purchases and ads.
In-app purchases
One-off purchases
/mo
of revenue
Where it ranks now
Both stores, across every country we track.
Ratings
Both stores. Store data, measured.
| Store | Rating | Ratings |
|---|---|---|
| App Store | 5.0 ★ | 18 |
| Google Play | – | – |
| Both stores | 5.0 ★ weighted by ratings | 18 |
About Kotoba - 동시통역・음성 메모
"Kotoba" is a real-time voice simultaneous translation app developed by Kotoba Technologies, aiming to deliver the "world's best simultaneous translation experience."
The app is built around Kotoba’s proprietary speech AI model, “Koto,” which supports our core translation languages, combined with external AI translation models for some other language pairs.
■ Privacy & AI Notice
・Kotoba records voice you choose to submit and generates transcripts/translations to provide real-time translation.
・We collect audio, transcripts/translations, and related account, device, and usage data.
・For individual users, unless you opt out, audio and transcripts may also be used to improve, evaluate, or train Kotoba's AI systems.
・Enterprise customer data is used only to provide the service and is not used for model training.
・Privacy Policy: https://dashboard.kotobatech.ai/privacy_en.html
■ Features
・Predictive AI simultaneous translation — translations can appear before you finish speaking
・Dialogue mode: connect by QR code and talk both ways in real time
・Supports a wide range of language pairs, centered around Japanese, English, Chinese, Korean, and Spanish, with 21 input languages and 13 output languages in total.
・Real-time translation from the moment you speak (live subtitles)
・All you need is your smartphone—no need to hire expensive human interpreters or carry bulky dedicated translation devices
・Translation results can be shared and saved as text instantly
■ How to Use
1) Open the app
2) Press the microphone button and speak
3) Translations appear on screen in real time
■ Perfect for These Scenarios
・Don't want to miss what others say in online or in-person meetings
・Frustrated with the wait times and usability of conventional translation apps
・Want to have richer conversations with locals while traveling or on business trips abroad
・Want smoother customer service and reception for international visitors
■ Media & Events
Featured on NHK, TV Tokyo, Forbes Japan, Abema TV News, and more.
■ Supported Languages
Supports a wide range of language pairs, centered around Japanese, English, Chinese, Korean, and Spanish, with 21 input languages and 13 output languages in total.
The app is built around Kotoba’s proprietary speech AI model, “Koto,” which supports our core translation languages, combined with external AI translation models for some other language pairs.
■ Plans
The Unlimited Plan (monthly/yearly) removes the 5-hour monthly usage limit.
*Latency, accuracy, and predictive display may vary depending on network conditions, device performance, and ambient noise.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Experience the moment when language barriers disappear—download now.
© 2026 Kotoba Technologies Inc.
The app is built around Kotoba’s proprietary speech AI model, “Koto,” which supports our core translation languages, combined with external AI translation models for some other language pairs.
■ Privacy & AI Notice
・Kotoba records voice you choose to submit and generates transcripts/translations to provide real-time translation.
・We collect audio, transcripts/translations, and related account, device, and usage data.
・For individual users, unless you opt out, audio and transcripts may also be used to improve, evaluate, or train Kotoba's AI systems.
・Enterprise customer data is used only to provide the service and is not used for model training.
・Privacy Policy: https://dashboard.kotobatech.ai/privacy_en.html
■ Features
・Predictive AI simultaneous translation — translations can appear before you finish speaking
・Dialogue mode: connect by QR code and talk both ways in real time
・Supports a wide range of language pairs, centered around Japanese, English, Chinese, Korean, and Spanish, with 21 input languages and 13 output languages in total.
・Real-time translation from the moment you speak (live subtitles)
・All you need is your smartphone—no need to hire expensive human interpreters or carry bulky dedicated translation devices
・Translation results can be shared and saved as text instantly
■ How to Use
1) Open the app
2) Press the microphone button and speak
3) Translations appear on screen in real time
■ Perfect for These Scenarios
・Don't want to miss what others say in online or in-person meetings
・Frustrated with the wait times and usability of conventional translation apps
・Want to have richer conversations with locals while traveling or on business trips abroad
・Want smoother customer service and reception for international visitors
■ Media & Events
Featured on NHK, TV Tokyo, Forbes Japan, Abema TV News, and more.
■ Supported Languages
Supports a wide range of language pairs, centered around Japanese, English, Chinese, Korean, and Spanish, with 21 input languages and 13 output languages in total.
The app is built around Kotoba’s proprietary speech AI model, “Koto,” which supports our core translation languages, combined with external AI translation models for some other language pairs.
■ Plans
The Unlimited Plan (monthly/yearly) removes the 5-hour monthly usage limit.
*Latency, accuracy, and predictive display may vary depending on network conditions, device performance, and ambient noise.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Experience the moment when language barriers disappear—download now.
© 2026 Kotoba Technologies Inc.
Kotoba - 동시통역・음성 메모 iPhone
Kotoba - 동시통역・음성 메모 is #11 in Reference Grossing in Japan and charting in 2 of 24 countries we track.
Updated 27 Sep 2026 · rankings refresh through the day
Developer(株)Kotoba Technologies Japan
CategoryReference
PriceFree
Released
Rating★ 5.0 (18)
Version1.4.11
Age rating4+
First seen by us 24 Sep 2026
24 Sep 2026Rating
5.0 ★
18 ratings
Measured
Best rank now
#11
Reference GrossingMeasured
Kotoba - 동시통역・음성 메모 on the App Store
App details
App ID
6740851285
Publisher
KOTOBA TECHNOLOGIES, INC.
Minimum OS
iOS 17.6+
Content rating
4+
Languages
6
EN JA KO ZH ES ZH
Size
57 MB
Kotoba - 동시통역・음성 메모 downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. iPhone downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Where Kotoba - 동시통역・음성 메모's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
Retention · share of new users still active
Day 1
Day 7
Day 30
Time spent · per daily user
Average time spent Pro
min a day
Sessions a day Pro
Time per session Pro
min
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
Business model: In-app purchase-led
How Kotoba - 동시통역・음성 메모 makes money: subscriptions, one-off purchases and ads.
In-app purchases
One-off purchases
/mo
of revenue
Where it ranks now
Every top chart it appears in across 24 countries.
| Country | Charts | Rank |
|---|---|---|
| Japan | ReferenceGrossing | #11 |
| Japan | ReferenceFree | #20 |
 South Korea | ReferenceGrossing | #50 |
Apps near Kotoba - 동시통역・음성 메모 on the chart
Reference Grossing, around #11.
Ratings
App Store, worldwide.
Rating
5.0 ★
18 ratings
Measured
Ratings
18
Measured
About Kotoba - 동시통역・음성 메모
"Kotoba" is a real-time voice simultaneous translation app developed by Kotoba Technologies, aiming to deliver the "world's best simultaneous translation experience."
The app is built around Kotoba’s proprietary speech AI model, “Koto,” which supports our core translation languages, combined with external AI translation models for some other language pairs.
■ Privacy & AI Notice
・Kotoba records voice you choose to submit and generates transcripts/translations to provide real-time translation.
・We collect audio, transcripts/translations, and related account, device, and usage data.
・For individual users, unless you opt out, audio and transcripts may also be used to improve, evaluate, or train Kotoba's AI systems.
・Enterprise customer data is used only to provide the service and is not used for model training.
・Privacy Policy: https://dashboard.kotobatech.ai/privacy_en.html
■ Features
・Predictive AI simultaneous translation — translations can appear before you finish speaking
・Dialogue mode: connect by QR code and talk both ways in real time
・Supports a wide range of language pairs, centered around Japanese, English, Chinese, Korean, and Spanish, with 21 input languages and 13 output languages in total.
・Real-time translation from the moment you speak (live subtitles)
・All you need is your smartphone—no need to hire expensive human interpreters or carry bulky dedicated translation devices
・Translation results can be shared and saved as text instantly
■ How to Use
1) Open the app
2) Press the microphone button and speak
3) Translations appear on screen in real time
■ Perfect for These Scenarios
・Don't want to miss what others say in online or in-person meetings
・Frustrated with the wait times and usability of conventional translation apps
・Want to have richer conversations with locals while traveling or on business trips abroad
・Want smoother customer service and reception for international visitors
■ Media & Events
Featured on NHK, TV Tokyo, Forbes Japan, Abema TV News, and more.
■ Supported Languages
Supports a wide range of language pairs, centered around Japanese, English, Chinese, Korean, and Spanish, with 21 input languages and 13 output languages in total.
The app is built around Kotoba’s proprietary speech AI model, “Koto,” which supports our core translation languages, combined with external AI translation models for some other language pairs.
■ Plans
The Unlimited Plan (monthly/yearly) removes the 5-hour monthly usage limit.
*Latency, accuracy, and predictive display may vary depending on network conditions, device performance, and ambient noise.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Experience the moment when language barriers disappear—download now.
© 2026 Kotoba Technologies Inc.
The app is built around Kotoba’s proprietary speech AI model, “Koto,” which supports our core translation languages, combined with external AI translation models for some other language pairs.
■ Privacy & AI Notice
・Kotoba records voice you choose to submit and generates transcripts/translations to provide real-time translation.
・We collect audio, transcripts/translations, and related account, device, and usage data.
・For individual users, unless you opt out, audio and transcripts may also be used to improve, evaluate, or train Kotoba's AI systems.
・Enterprise customer data is used only to provide the service and is not used for model training.
・Privacy Policy: https://dashboard.kotobatech.ai/privacy_en.html
■ Features
・Predictive AI simultaneous translation — translations can appear before you finish speaking
・Dialogue mode: connect by QR code and talk both ways in real time
・Supports a wide range of language pairs, centered around Japanese, English, Chinese, Korean, and Spanish, with 21 input languages and 13 output languages in total.
・Real-time translation from the moment you speak (live subtitles)
・All you need is your smartphone—no need to hire expensive human interpreters or carry bulky dedicated translation devices
・Translation results can be shared and saved as text instantly
■ How to Use
1) Open the app
2) Press the microphone button and speak
3) Translations appear on screen in real time
■ Perfect for These Scenarios
・Don't want to miss what others say in online or in-person meetings
・Frustrated with the wait times and usability of conventional translation apps
・Want to have richer conversations with locals while traveling or on business trips abroad
・Want smoother customer service and reception for international visitors
■ Media & Events
Featured on NHK, TV Tokyo, Forbes Japan, Abema TV News, and more.
■ Supported Languages
Supports a wide range of language pairs, centered around Japanese, English, Chinese, Korean, and Spanish, with 21 input languages and 13 output languages in total.
The app is built around Kotoba’s proprietary speech AI model, “Koto,” which supports our core translation languages, combined with external AI translation models for some other language pairs.
■ Plans
The Unlimited Plan (monthly/yearly) removes the 5-hour monthly usage limit.
*Latency, accuracy, and predictive display may vary depending on network conditions, device performance, and ambient noise.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Experience the moment when language barriers disappear—download now.
© 2026 Kotoba Technologies Inc.
Latest updates
1.4.11
Kotoba—Voice Interpreter・Memos Android
Kotoba—Voice Interpreter・Memos is #9 in Books & Reference Free on Google Play in Japan and charting in 1 of 15 countries we track.
Updated 27 Sep 2026 · rankings refresh through the day
DeveloperKotoba Technologies
CategoryBooks & Reference
PriceFree
Released
Installs100k+
Rating–
Updated
Content ratingEveryone
Best rank now
#9
Books & Reference FreeMeasured
Kotoba—Voice Interpreter・Memos on Google Play
App details
App ID
jp.tech.kotoba.app
Publisher
Kotoba Technologies
Content rating
Everyone
Kotoba—Voice Interpreter・Memos downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Google Play shows an exact lifetime install count; downloads per day are its daily change (measured). When Play hasn't refreshed the count, they come from new ratings and Top Free chart positions. Confidence is the chance the real number is within half to double ours.
Where Kotoba—Voice Interpreter・Memos's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
Business model: In-app purchase-led
How Kotoba—Voice Interpreter・Memos makes money: subscriptions, one-off purchases and ads.
In-app purchases
One-off purchases
/mo
of revenue
Where it ranks on Google Play
Every top 200 chart it appears in across 15 countries.
| Country | Charts | Rank |
|---|---|---|
| Japan | Books & ReferenceFree | #9 |
Apps near Kotoba—Voice Interpreter・Memos on the chart
Books & Reference Free, around #9.
About Kotoba—Voice Interpreter・Memos
"Kotoba" is a real-time voice simultaneous translation app developed by Kotoba Technologies, aiming to deliver the "world's best simultaneous translation experience."
The app is built around Kotoba’s proprietary speech AI model, “Koto,” which supports our core translation languages, combined with external AI translation models for some other language pairs.
■ Privacy & AI Notice
・Kotoba records voice you choose to submit and generates transcripts/translations to provide real-time translation.
・We collect audio, transcripts/translations, and related account, device, and usage data.
・For individual users, unless you opt out, audio and transcripts may also be used to improve, evaluate, or train Kotoba's AI systems.
・Enterprise customer data is used only to provide the service and is not used for model training.
・Privacy Policy: https://dashboard.kotobatech.ai/privacy_en.html
■ Features
・Predictive AI simultaneous translation — translations can appear before you finish speaking
・Dialogue mode: connect by QR code and talk both ways in real time
・Supports a wide range of language pairs, centered around Japanese, English, Chinese, Korean, and Spanish, with 21 input languages and 13 output languages in total.
・Real-time translation from the moment you speak (live subtitles)
・All you need is your smartphone—no need to hire expensive human interpreters or carry bulky dedicated translation devices
・Translation results can be shared and saved as text instantly
■ How to Use
1) Open the app
2) Press the microphone button and speak
3) Translations appear on screen in real time
■ Perfect for These Scenarios
・Don't want to miss what others say in online or in-person meetings
・Frustrated with the wait times and usability of conventional translation apps
・Want to have richer conversations with locals while traveling or on business trips abroad
・Want smoother customer service and reception for international visitors
■ Media & Events
Featured on NHK, TV Tokyo, Forbes Japan, Abema TV News, and more.
■ Supported Languages
Supports a wide range of language pairs, centered around Japanese, English, Chinese, Korean, and Spanish, with 21 input languages and 13 output languages in total.
The app is built around Kotoba’s proprietary speech AI model, “Koto,” which supports our core translation languages, combined with external AI translation models for some other language pairs.
■ Plans
The Unlimited Plan (monthly/quarterly) removes the 5-hour monthly usage limit.
*Latency, accuracy, and predictive display may vary depending on network conditions, device performance, and ambient noise.
Terms of Use: https://dashboard.kotobatech.ai/terms_en.html
Experience the moment when language barriers disappear—download now.
The app is built around Kotoba’s proprietary speech AI model, “Koto,” which supports our core translation languages, combined with external AI translation models for some other language pairs.
■ Privacy & AI Notice
・Kotoba records voice you choose to submit and generates transcripts/translations to provide real-time translation.
・We collect audio, transcripts/translations, and related account, device, and usage data.
・For individual users, unless you opt out, audio and transcripts may also be used to improve, evaluate, or train Kotoba's AI systems.
・Enterprise customer data is used only to provide the service and is not used for model training.
・Privacy Policy: https://dashboard.kotobatech.ai/privacy_en.html
■ Features
・Predictive AI simultaneous translation — translations can appear before you finish speaking
・Dialogue mode: connect by QR code and talk both ways in real time
・Supports a wide range of language pairs, centered around Japanese, English, Chinese, Korean, and Spanish, with 21 input languages and 13 output languages in total.
・Real-time translation from the moment you speak (live subtitles)
・All you need is your smartphone—no need to hire expensive human interpreters or carry bulky dedicated translation devices
・Translation results can be shared and saved as text instantly
■ How to Use
1) Open the app
2) Press the microphone button and speak
3) Translations appear on screen in real time
■ Perfect for These Scenarios
・Don't want to miss what others say in online or in-person meetings
・Frustrated with the wait times and usability of conventional translation apps
・Want to have richer conversations with locals while traveling or on business trips abroad
・Want smoother customer service and reception for international visitors
■ Media & Events
Featured on NHK, TV Tokyo, Forbes Japan, Abema TV News, and more.
■ Supported Languages
Supports a wide range of language pairs, centered around Japanese, English, Chinese, Korean, and Spanish, with 21 input languages and 13 output languages in total.
The app is built around Kotoba’s proprietary speech AI model, “Koto,” which supports our core translation languages, combined with external AI translation models for some other language pairs.
■ Plans
The Unlimited Plan (monthly/quarterly) removes the 5-hour monthly usage limit.
*Latency, accuracy, and predictive display may vary depending on network conditions, device performance, and ambient noise.
Terms of Use: https://dashboard.kotobatech.ai/terms_en.html
Experience the moment when language barriers disappear—download now.
What's new in 1.4.11
Bug fixes and performance improvements