iKnow! Downloads & RevenueiKnow! · App Store
英語学習 iKnow!
Not in any tracked top chart right now.
Updated 11 Nov 2026 · rankings refresh through the day
DeveloperDMM.com LLC
CategoryEducation
PriceFree
Released
Rating★ 4.7 (16k)
Version5.5.6
Age rating4+
First seen by us
27 Sep 2026
27 Sep 2026Installs (est.)1M+ worldwide
Full timeline · 2 events in the last 12 months
- 🆕iKnow! first spotted by AppInsider#98 in Top Grossing · Education · Japan
- 🆕iKnow! released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
4.7 ★
16k ratings
Measured
New ratings a week
2.8
▲ ×11+ vs the 2 weeks before
Measured
iKnow! on the App Store
App details
App ID
417713473
Publisher
DMM.com LLC
On the store since
Mar 2011
15 years on the store
Minimum OS
iOS 14.0+
iPhone 6s and later
Devices
iPhone · iPad
Universal purchase
Content rating
4+
Languages
2
EN JA
Size
20 MB
Also listed in
Productivity
iKnow! 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. App Store 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.
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.
In-app revenue
Worldwide, what users spend in iKnow! before Apple and Google take their fee.
How this is calculated
Not on any Top Grossing chart: monthly active users × spend per user for its category, measured on the charted apps nearest the bottom of the charts.
Business model: Subscription-led
How iKnow! makes money: subscriptions, one-off purchases and ads.
SubscriptionsIn-app purchases
Subscriptions
/mo
of revenue
Top in-app purchases · App Store US, most popular first
| 1 | 3 Month Plan subscription | |
| 2 | 12 Month Plan subscription | |
| 3 | 12+1 Month Plan subscription | |
| 4 | 12 Month Plan subscription | |
| 5 | 12 Month Plan subscription | |
| 6 | 6 Month Plan subscription | |
| 7 | 12+1 Month Plan subscription | |
| 8 | 12+3 Month Plan subscription | |
| 9 | 12 Month Plan subscription | |
| 10 | 6+1 Month Plan subscription |
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Not charting right now. | ||
Ratings
App Store, worldwide.
Rating
4.7 ★
16k ratings
Measured
Ratings
16k
Measured
Review momentum
ⓘ How we measure thisNew ratings a week
2.8
▲ ×11+ vs the 2 weeks before
Lifetime rating
4.7★
recent stars not readable yet: new ratings are a tiny share of the total
Review momentum
78/100
faster than 76% of Education apps
Review momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
About iKnow!
Enjoy the iKnow! experience on your phone or tablet!
All your iKnow! study progress is automatically synched across devices, so you can study in the way that best matches your needs and lifestyle.
“Japanese, Chinese, and English”
Official courses are offered for studying Japanese, Chinese, and SAT English. The Japanese courses cover the 6,000 most commonly used words in Japanese. The Chinese courses cover the 2,000 most commonly used words in spoken Chinese and over 1,200 words commonly used in newspapers and magazines. (All Chinese courses are available in both Traditional and Simplified Chinese.) All words have sample sentences and audio.
“The iKnow! Learning Engine”
iKnow! presents items in a spaced rehearsal pattern optimized for efficient learning. iKnow! adapts to differences in learning speeds and item difficulty, constantly measuring memory and predicting performance across all of your items. iKnow! does this by tracking your performance and then predicting your optimal review time on an item-by-item basis.
All you have to do is push the study button, and iKnow! tells you what to learn.
＊＊＊＊＊＊＊＊＊＊＊＊＊＊
Features:
- Five study modes: iKnow!, Rapid Choice, Self Check, Sentence Trainer, and Listening.
- iKnow!: Master words and phrases with our patented learning algorithms.
- Rapid Choice: Fast-paced quizzing and review.
- Self Check: Judge yourself on what you know and how well.
- Sentence Trainer: Master sentence patterns by listening and then dictating.
- Listening: Listen to content on the go. You can slow down and loop any audio.
- Study progress synched across supported devices.
All your iKnow! study progress is automatically synched across devices, so you can study in the way that best matches your needs and lifestyle.
“Japanese, Chinese, and English”
Official courses are offered for studying Japanese, Chinese, and SAT English. The Japanese courses cover the 6,000 most commonly used words in Japanese. The Chinese courses cover the 2,000 most commonly used words in spoken Chinese and over 1,200 words commonly used in newspapers and magazines. (All Chinese courses are available in both Traditional and Simplified Chinese.) All words have sample sentences and audio.
“The iKnow! Learning Engine”
iKnow! presents items in a spaced rehearsal pattern optimized for efficient learning. iKnow! adapts to differences in learning speeds and item difficulty, constantly measuring memory and predicting performance across all of your items. iKnow! does this by tracking your performance and then predicting your optimal review time on an item-by-item basis.
All you have to do is push the study button, and iKnow! tells you what to learn.
＊＊＊＊＊＊＊＊＊＊＊＊＊＊
Features:
- Five study modes: iKnow!, Rapid Choice, Self Check, Sentence Trainer, and Listening.
- iKnow!: Master words and phrases with our patented learning algorithms.
- Rapid Choice: Fast-paced quizzing and review.
- Self Check: Judge yourself on what you know and how well.
- Sentence Trainer: Master sentence patterns by listening and then dictating.
- Listening: Listen to content on the go. You can slow down and loop any audio.
- Study progress synched across supported devices.
Latest updates
5.5.6
* Study: Various UI improvements. -Text is easier to read now, especially in larger devices. -New animations. -More confetti.
* Study: Support for larger text sizes. Frequently requested by our users, iKnow! now supports iOS Text Size setting. Open your device Settings, then Display & Brightness > Text Size, and use the slider to choose your desired text size (it may differ depending on your iOS version). If you're using iOS 15+, you can change the text size per app by opening Control Center and long-pressing the Text Size control. Note: Only Study screens support this new feature for now. We plan to add support for all other screens in a future update.
* Study Multiple Choice: Added new preferences for the previously introduced UI. You can now turn off label numbers, invert the bottom button order, or disable the added UI entirely.
* Bug fixes.
