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Knock Knock: Room Defense icon
GOOGLE PLAY

Knock Knock: Room Defense

Joy Nice Games · Casual · United Kingdom store
NOT IN TOP 100 HERE
View on Google Play ↗
Revenue a month, worldwide EST
$303.2K
Likely $101.1K to $909.7K
▼ 41.3% in 27 days
New ratings
Tracking
Daily counts start building from today
Rating
4.0 of 5
4.9K ratings in this store
Countries it ranks in
4
was 3 on Oct 15, 2026

Revenue

Estimated from the grossing charts of Oct 21, 2026 in the 53 countries we track.

EST. REVENUE / MONTH · WORLDWIDE · GOOGLE PLAY
$303.2K
Range $101.1K to $909.7K
EST. REVENUE / YEAR · WORLDWIDE
$3.6M
No App Store version found
LIFETIME INSTALLS (GOOGLE)
427.3K
About 236.2K per month on average since launch
WHERE IT EARNS · EST. / MONTH
  • Germany #98 Games: Casual$137.3K · 45%
  • France #90 Games: Casual$64.1K · 21%
  • Brazil #98 Games: Casual$57.2K · 19%
  • Mexico #63 Games: Casual$44.6K · 15%
HOW SURE ARE WE
Lower confidence: this app ranks below the overall top 50 everywhere, where single estimates can be off 2 to 4 times. The range is wide on purpose. Countries we don't track (and Google Play in China, which doesn't exist) aren't included, and neither are ads or web payments. Gross revenue before store fees.
RATINGS
4.9K
AVG RATING
4.00
PRICE
Free
IN APP PURCHASES
£0.29 - £299.99 if billed through Play
CONTAINS ADS
Yes
LAST UPDATE
10d ago
RELEASED
Aug 28, 2026
CONTENT RATING
PEGI 16

Last 29 days

From our daily snapshots of every grossing chart.

DAYS IN A GROSSING CHART
29 / 29
COUNTRIES NOW
4 (was 8)
EST. REVENUE A MONTH, DAILY · GOOGLE PLAY EST
Show daily values
Sep 24, 2026$516.4K a month
Sep 25, 2026$525.2K a month
Sep 26, 2026$533.1K a month
Sep 27, 2026$532K a month
Sep 28, 2026$859.7K a month
Sep 29, 2026$858.8K a month
Sep 30, 2026$830K a month
Oct 1, 2026$834.1K a month
Oct 2, 2026$753.1K a month
Oct 3, 2026$765.1K a month
Oct 4, 2026$392.8K a month
Oct 5, 2026$381.4K a month
Oct 6, 2026$385.8K a month
Oct 7, 2026$341.4K a month
Oct 8, 2026$335K a month
Oct 9, 2026$190.1K a month
Oct 10, 2026$182.4K a month
Oct 11, 2026$126.7K a month
Oct 12, 2026$178.5K a month
Oct 13, 2026$185.3K a month
Oct 14, 2026$171.3K a month
Oct 15, 2026$173.5K a month
Oct 16, 2026$177.8K a month
Oct 17, 2026$165.3K a month
Oct 18, 2026$170.6K a month
Oct 19, 2026$169.2K a month
Oct 20, 2026$163.7K a month
Oct 21, 2026$303.2K a month
Oct 22, 2026not in a grossing chart
The same estimate as the headline, saved every day. Best rank Sep 24, 2026: #38 Games: Casual · MX. Now: #63 Games: Casual · MX.

Money and momentum

Measured from the store, not estimated.

WHAT IT CHARGES
£0.29 - £299.99 if billed through Play
Google Play only shows the price range per item.
REVIEW MOMENTUM
15 reviews / week
  • Trendfalling
  • Recent reviews average2.6 stars
  • Recent 1 and 2 star share56%
From the latest 104 written reviews, covering 49 days.
RATING BREAKDOWN
4.9K ratings
5★73%
4★0%
3★0%
2★9%
1★18%

What users say

Latest reviews, United Kingdom Google Play.

★★★★★Oct 20, 2026

copy type

★★★★★Oct 18, 2026

merge severs now , s23 is dead. edit: change rating to one star. retarded support reply in Russian

★★★★★Oct 15, 2026

My account got reset or lost. therefore, I uninstalled the game and gave it 1 star.

★★★★★Oct 11, 2026

The game is simple but fun... at least in the beginning. But it is very P2W! If you don't spend - you will have Zero chances in the most of the events. Events are very dependent on the amount of money you spend. I was not a F2P at all, but I gave up today seeing how greedy latest events got. No wonder so many of our players and even servers lose population so quickly. Uninstalled. Might revisit if devs will get a bit less greedy!

★★★★★Oct 8, 2026

Good game, good graphics, nice coop play, heavily reliant on team to play extra side games (eg. must have active guild and members), rewards a little mediocre, kind of pay to progress with some gacha mechanics... Cannot switch server! Unable log in!

★★★★★Oct 2, 2026

no one plays this game it's all bots players

Apps like this

Same category, earning about as much.

Store screenshots

ScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshot

Growth research

Where this app is buying and earning its users. Each link opens pre filtered.

ASO keywords

Most repeated terms in the listing. Highlighted ones also appear in the title or short description.

tower defense6defense6door5close door5ghosts4heroes4tower4ghosts monsters3choose room3room close3kick back3defense line3close3room3monsters2knock2defend2locations2minute2horror2choose2relax2level2kick2

What's new in 1.10000.97

No release notes.

Store description

[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.

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Prices, ranks and reviews are per country. Revenue above is already worldwide.

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