Knock Knock: Room Defense Android
30 days old
Knock Knock: Room Defense gets 1k+ downloads a day worldwide (AppInsider estimate, September 2026, rounded down to a band).
Knock Knock: Room Defense is #102 in Games › Casual Grossing on Google Play in United States and charting in 8 of 15 countries we track.
Updated 27 Sep 2026 · rankings refresh through the day
DeveloperJoy Nice Games
CategoryGames › Casual
PriceFree
Released
Installs100k+
Rating★ 4.4 (4.3k)
Updated
Content ratingTeen
Rating
4.4 ★
4.3k ratings
Measured
Best rank now
#102
🇺🇸 Games › Casual Grossing
Measured
Knock Knock: Room Defense 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 Knock Knock: Room Defense'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.
In-app revenue
Worldwide, what users spend in Knock Knock: Room Defense before Apple and Google take their fee.
How this is calculated
Not in an overall Top Grossing chart, only in category charts: each category position is converted to the overall position it corresponds to, then priced on the same rank-to-revenue curve, inside the part of each market the charted apps leave over.
Business model: In-app purchase-led
How Knock Knock: Room Defense makes money: subscriptions, one-off purchases and ads.
In-app purchasesAds · 6 ad networks
One-off purchases
/mo
of revenue
Ads
/mo
of revenue
Where it ranks on Google Play
Every top 200 chart it appears in across 15 countries.
| Country | Charts | Rank |
|---|---|---|
| 🇺🇸 United States | Games › CasualGrossing | #102 |
| 🇩🇪 Germany | Games › CasualGrossing | #71 |
| 🇫🇷 France | Games › CasualGrossing | #66 |
| 🇧🇷 Brazil | Games › CasualGrossing | #53 |
| 🇨🇦 Canada | Games › CasualGrossing | #74 |
| 🇬🇧 United Kingdom | Games › CasualGrossing | #157 |
| 🇩🇪 Germany | Games › CasualFree | #189 |
| 🇦🇪 United Arab Emirates | Games › CasualGrossing | #74 |
| 🇷🇺 Russia | Games › CasualFree | #162 |
Apps near Knock Knock: Room Defense on the chart
🇺🇸 Games › Casual Grossing, around #102.
Ratings
Google Play, worldwide.
Rating
4.4 ★
4.3k ratings
Measured
Ratings
4.3k
Measured
Written reviews
67
Measured
Knock Knock: Room Defense app details
App ID
com.ygjszus.google
Publisher
Joy Nice Games
Publisher country
–
Content rating
Teen
About Knock Knock: Room Defense
[Special Rewards] 404 Draws, Character Skin, Random Orange Hero, and Limited Decor!
When your city becomes the hunting ground for ghosts and monsters... "Knock, knock." Someone's knocking on your door...
"Shh, don't make a sound, and don't open the door."
Creatures from age-old tales and urban legends are trying to break into your house. Your job? Close the door and defend it with your heroes as your heart pounds with excitement and no fear.
Schools, hospitals, hotels, streets, and office buildings—the most mundane locations become thrill-filled tower defense challenges. Get ready for stunning visuals and smooth controls in 5-minute matches!
[Five Main Features to Define New Horror Tower Defense]
※ Choose your room, close the door, relax, and level up!
Ghosts are here and there's no escape? Well—kick back and relax!
Choose your room, close the door, and kick back to level up in dreams and summon heroes to build your defense line! It's up to you to defend the ghosts and monsters at night!
※ Strategize to turn the table in the mind game
No risking your life, but more than hide-and-seek! Everything from the beds, doors, to your heroes can be leveled up, because the whole room is your defense line. Build the right lineup and plan wisely for every challenge and event. Every win is guaranteed to be rewarding.
※ Immersive visual experience
Dive into the immersive eerie world with a distinct gothic chibi-style aesthetic. Is it blood or wine in the cup held by the vampire? Why is the killer with a chainsaw wearing a cute bunny mask? A hundred unique and stylized heroes and ghosts with cute horror elements.
※ Wide selections of avatars and instances
Turn into a ghost hunter and explore all kinds of haunted locations—from a train with lingering phantoms, a dormitory echoing with singing at midnight, to a mysterious underground cave. Now, pick your avatar from a wide collection and brace yourself for the ghost chase.
※ Fast and exciting tower defense battle
Grab your phone and start a 5-minute no-stress match anytime, anywhere! Quality tower defense fun made simple and fast.
When your city becomes the hunting ground for ghosts and monsters... "Knock, knock." Someone's knocking on your door...
"Shh, don't make a sound, and don't open the door."
Creatures from age-old tales and urban legends are trying to break into your house. Your job? Close the door and defend it with your heroes as your heart pounds with excitement and no fear.
Schools, hospitals, hotels, streets, and office buildings—the most mundane locations become thrill-filled tower defense challenges. Get ready for stunning visuals and smooth controls in 5-minute matches!
[Five Main Features to Define New Horror Tower Defense]
※ Choose your room, close the door, relax, and level up!
Ghosts are here and there's no escape? Well—kick back and relax!
Choose your room, close the door, and kick back to level up in dreams and summon heroes to build your defense line! It's up to you to defend the ghosts and monsters at night!
※ Strategize to turn the table in the mind game
No risking your life, but more than hide-and-seek! Everything from the beds, doors, to your heroes can be leveled up, because the whole room is your defense line. Build the right lineup and plan wisely for every challenge and event. Every win is guaranteed to be rewarding.
※ Immersive visual experience
Dive into the immersive eerie world with a distinct gothic chibi-style aesthetic. Is it blood or wine in the cup held by the vampire? Why is the killer with a chainsaw wearing a cute bunny mask? A hundred unique and stylized heroes and ghosts with cute horror elements.
※ Wide selections of avatars and instances
Turn into a ghost hunter and explore all kinds of haunted locations—from a train with lingering phantoms, a dormitory echoing with singing at midnight, to a mysterious underground cave. Now, pick your avatar from a wide collection and brace yourself for the ghost chase.
※ Fast and exciting tower defense battle
Grab your phone and start a 5-minute no-stress match anytime, anywhere! Quality tower defense fun made simple and fast.