Kotoba—Voice Interpreter・Memos: iPhone vs Android
Kotoba—Voice Interpreter・Memos gets 500+ downloads a day worldwide (AppInsider estimate, October 2026, rounded down to a band).
Kotoba—Voice Interpreter・Memos 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.
Reference GrossingKotoba—Voice Interpreter・Memos at a glance
AI summary written from our chart and store data, 2026-10-01. It can be wrong: check the numbers above.
Kotoba is a real-time voice translation app using proprietary AI to provide simultaneous interpretation for travelers, business professionals, and international communicators. The app has recently charted at #5 in Japan's Reference Grossing category and #16 in Free apps, indicating strong monetization traction despite being free to download.
Similar apps: iTranslate, Microsoft Translator, Papago
App Store
App details
App privacy Measured
Kotoba—Voice Interpreter・Memos’s App Store privacy label declares 0 data categories used to track you across other companies’ apps and websites, 0 linked to your identity and 4 collected anonymously.
As declared by the developer on the App Store — Apple requires every app to publish this label. We track changes over time.
Google Play
App details
Kotoba—Voice Interpreter・Memos downloads & installs
Both stores, worldwide. Bands are open; exact numbers are free with an account.
| Store | Downloads / day | Lifetime installs |
|---|---|---|
| iPhone | 100+ | – |
| Google Play | 100+ | 100k+ Measured |
| Total | 500+ Confidence | 100k+ Confidence |
How this is calculated
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.
Retention · share of new users still active
Time spent · per daily user
How this is calculated
Business model: In-app purchase-led
How Kotoba—Voice Interpreter・Memos makes money: subscriptions, one-off purchases and ads.
Where it ranks now
Both stores, across every country we track.
Ratings
Both stores. Store data, measured.
| Store | Rating | Ratings |
|---|---|---|
| App Store | 0.0 ★ | – |
| Google Play | – | – |
| Both stores | – | 0 |
What users say about Kotoba—Voice Interpreter・Memos
From recent reviews.
About Kotoba—Voice Interpreter・Memos
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—Voice Interpreter・Memos iPhone
Kotoba—Voice Interpreter・Memos gets 500+ downloads a day worldwide (AppInsider estimate, October 2026, rounded down to a band).
Kotoba—Voice Interpreter・Memos is #9 in Reference Grossing in Japan and charting in 2 of 30 countries we track.
Updated 25 Oct 2026 · rankings refresh through the day
24 Sep 2026 Reference GrossingKotoba—Voice Interpreter・Memos at a glance
AI summary written from our chart and store data, 2026-10-01. It can be wrong: check the numbers above.
Kotoba is a real-time voice translation app using proprietary AI to provide simultaneous interpretation for travelers, business professionals, and international communicators. The app has recently charted at #5 in Japan's Reference Grossing category and #16 in Free apps, indicating strong monetization traction despite being free to download.
Similar apps: iTranslate, Microsoft Translator, Papago
Kotoba—Voice Interpreter・Memos on the App Store
App details
App privacy Measured
Kotoba—Voice Interpreter・Memos’s App Store privacy label declares 0 data categories used to track you across other companies’ apps and websites, 0 linked to your identity and 4 collected anonymously.
As declared by the developer on the App Store — Apple requires every app to publish this label. We track changes over time.
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
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.
Retention · share of new users still active
Time spent · per daily user
How this is calculated
Business model: In-app purchase-led
How Kotoba—Voice Interpreter・Memos makes money: subscriptions, one-off purchases and ads.
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Japan | ReferenceGrossing | #9 |
| Japan | ReferenceFree | #20 |
 South Korea | ReferenceGrossing | #22 |
| South Korea | ReferenceFree | #84 |
Apps near Kotoba—Voice Interpreter・Memos on the chart
Reference Grossing, around #9.
Ratings
App Store, worldwide.
What users say about Kotoba—Voice Interpreter・Memos
From recent reviews.
About Kotoba—Voice Interpreter・Memos
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
Store changes
What Kotoba—Voice Interpreter・Memos changed on its store page: name, icon, screenshots, price, size, languages, requirements.
Kotoba—Voice Interpreter・Memos Android
Kotoba—Voice Interpreter・Memos gets 500+ downloads a day worldwide (AppInsider estimate, October 2026, rounded down to a band).
Kotoba—Voice Interpreter・Memos is #10 in Books & Reference Free on Google Play in Japan and charting in 1 of 23 countries we track.
Updated 25 Oct 2026 · rankings refresh through the day
Books & Reference FreeKotoba—Voice Interpreter・Memos on Google Play
App details
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
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.
Retention · share of new users still active
Time spent · per daily user
How this is calculated
Business model: In-app purchase-led
How Kotoba—Voice Interpreter・Memos makes money: subscriptions, one-off purchases and ads.
Where it ranks on Google Play
Every top 200 chart it appears in across 23 countries.
| Country | Charts | Rank |
|---|---|---|
| Japan | Books & ReferenceFree | #10 |
Apps near Kotoba—Voice Interpreter・Memos on the chart
Books & Reference Free, around #10.
What users say about Kotoba—Voice Interpreter・Memos
From recent reviews.
About Kotoba—Voice Interpreter・Memos
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.