Comparison

Virus Killer vs Kakuso Challenge

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Virus Killer

A puzzle game where players strategically drop colored capsules to eliminate viruses. Match four or more of the same color to clear them from the board and complete levels. Avoid filling the bottle to prevent a game over.

Highlights
  • Falling capsule manipulation
  • Color-matching mechanics
  • Virus elimination objectives
  • Level-based progression
  • Adjustable difficulty levels
  • Multiple game speed options
Features
Read full description

The board is populated by viruses of three colors: red, yellow, and blue. In a manner and style considered similar to Tetris, the player manipulates each capsule as it falls, moving it left or right and rotating it such that it is positioned alongside the viruses and any existing capsules. When four or more capsule halves or viruses of matching color are aligned in vertical or horizontal configurations, they are removed from play. The main objective is to complete levels, which is accomplished by eliminating all viruses from the playing field. A game over occurs if capsules fill up the playing field in a way that obstructs the bottle's narrow neck. Players can select the degree of starting difficulty any time a new game is started. The initial level chosen is a value between zero and twenty that determines the number of viruses to clear, and the three game speed options change how fast the capsules fall in the bottle. The player's score is based solely on the elimination of viruses, not on the time taken to complete the level or the number of capsules used. If players complete the highest difficulty level, they can continue playing to accumulate a higher score, but the number of viruses to clear remains the same. Additional points are awarded when multiple viruses are eliminated at once, but no additional points are awarded for initiating chain reactions, in which the elimination of one set of objects triggers the elimination of another set. The game speed is also a factor in how the game calculates scoring; higher speed levels yield more points.

About

Kakuso Challenge

Features
Read full description

Attractive Layout, Amazing Graphics, Extraordinary Designed Board, Intuitive User Interface, Ease of Use. This is the more advance level board game that you should challenge like you never experience before. Unlimited puzzles with varied level of difficulty to fit your choice. 6x6, 8x8, 10x10, 10x12 You’ll never regret having this Kakuso Challenge, which is just perfectly challenge your mind, your logical thinking skill, your brain cells! Interrupted? Need a Break? Exit Kakuso Challenge and you’ll get to see your incomplete puzzle is saved and awaiting for your return. Stuck? Need some guide? Simply click on hints and you'll get an answer right away! Useful hints as aid, why not! Feature: - Auto Save Mode - Levels of Difficulty - Endless, Randomly Generated Puzzles - Game Timer - Pause/Resume Puzzle - Smart Hints How to play: The goal is to make some of the cells check in such a way that:
 1. Tap to fill the cells with Light Blue and Green squares.

 2. The check cells on each row and column to have equal number of Light Blue and Green squares. 3.1 Three(3) cells same color in row are not allowed for level 6 x 6 and 8 x 8. 3.2 Four(4) cells same color in row are not allowed for level 10 x 10 and 10 x 12 

 Tap to change cells color

Screenshots

Virus Killer4 screens
Kakuso Challenge4 screens

Verdict

The call

The clearest difference is in-app purchases: Virus Killer at none against Kakuso Challenge's 3. Virus Killer also leads on update cadence (every 6 weeks vs every 6 months) and iOS requirement (11.0 vs 13.1). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Kakuso Challenge sells 3 one-off in-app purchases. Virus Killer asks for nothing beyond the download.

UpkeepUpdate frequency

Virus Killer ships an update every 6 weeks, Kakuso Challenge every 6 months. The most recent releases landed on October 23, 2026 and October 7, 2026 respectively.

Scorecard3 real differences · 7 level
Virus Killer versus Kakuso Challenge: the parameters behind the verdict, then further details
ParameterVirus KillerKakuso Challenge
PriceFreeFree
Rating3.3 (6 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings6 — better—
Update frequencyEvery 6 weeks — betterEvery 6 months
AdsYesYes
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better13.1
Further details — not scored
Size13 MB17 MB
Age rating4+4+
Developer毅 郑Alven Kam

In-app purchases

None

Virus Killer

No in-app purchases

3 purchases

Kakuso Challenge

One-time3
  • Kakuso Challenge 20 Hints$0.99
  • Kakuso Challenge 50 Hints$1.99
  • Kakuso Challenge 100 Hints$2.99

Questions

Is Virus Killer free?
Virus Killer is free to download, with no in-app purchases.
Is Kakuso Challenge free?
Kakuso Challenge is free to download, with in-app purchases available.
Do Virus Killer or Kakuso Challenge have ads?
Both Virus Killer and Kakuso Challenge show ads.
Which is updated more often, Virus Killer or Kakuso Challenge?
Virus Killer ships an update every 6 weeks, and Kakuso Challenge every 6 months. Most recently, Virus Killer was updated on October 23, 2026 and Kakuso Challenge on October 7, 2026.

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