Comparison

아쿠아폴리스 vs Kon21

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

Head to head
About

아쿠아폴리스

Construct a vibrant underwater metropolis, uncover a planet-saving mystery, and educate its inhabitants. Explore lost civilizations and solve cryptic messages with the help of engaging characters. Play with friends to build and thrive in this aquatic world.

Highlights
  • Build over 80 unique buildings and decorations
  • Solve mysteries and quests
  • Develop new technologies
  • Collect special tools
  • Immersive 3D graphics
  • Play with friends
Features
Read full description

Build a thriving underwater city, reveal the truth and save the planet in amazing FREE TO PLAY game! What has happened to the Earth in this distant future? Why is the whole planet covered with water? Find the answers with the help of brilliant Professor, charming Lana and charismatic Captain. *ALSO* Help the locals turn an old, abandoned village into a thriving metropolis. Build a modern underwater city with fully developed infrastructure. Educate the underwater inhabitants on every aspect of your modern technology. Seek out the remnants of lost civilization and solve the cryptic messages of an unlucky scientist. Play with your Kakao friends! *KEY FEATURES* * BUILD over 80 unique buildings and decorations for your city * SOLVE amazing mysteries and quests * DEVELOP new technologies * COLLECT special tools for repairs and maintenance. * IMMERSE yourself in this underwater city environment thanks to the impressive 3D graphics * PLAY with your friends Official Page on Facebook: www.facebook.com/AquapolisGame Follow us on Twitter: @AquapolisGame

About

Kon21

Embark on a cosmic adventure to restore balance to chaotic zodiac realms. Battle evolving creatures using a unique blackjack-inspired card system and master the art of 21 to unleash powerful attacks. Explore pixel-crafted worlds with a retro aesthetic.

Highlights
  • Explore living zodiac realms
  • Conway-powered evolving creatures
  • Strategic blackjack-inspired combat
  • Master the art of 21
  • Retro pixel aesthetic
Features
Read full description

KON21: THE ZODIAC WARRIOR A long time ago, across distant constellations, the zodiac realms fell into chaos. Ancient creatures now roam the stars — their forms evolving, shifting, and living through the mysterious patterns of Conway’s Game of Life. Only one warrior can restore balance. Will you master the sacred art of 21? --- EXPLORE LIVING WORLDS Traverse pixel-crafted zodiac realms filled with dynamic, evolving creatures. No two encounters are ever the same. CONWAY-POWERED CREATURES Enemies are alive. Their patterns shift, grow, and change based on cellular automata mechanics inspired by Conway’s Game of Life. STRATEGIC CARD BATTLES Engage in unique blackjack-inspired combat. Push your luck, outplay your opponent, and strike at the perfect moment. MASTER THE ART OF 21 Balance risk and reward as you build your hand and unleash powerful attacks tied to zodiac energy. RETRO PIXEL AESTHETIC A nostalgic visual experience with modern gameplay depth. Clean, minimal, and designed for immersive play. --- Will you conquer the zodiac realms… or be consumed by the chaos? Download KON21 and begin your journey.

Screenshots

아쿠아폴리스4 screens
Kon213 screens

Verdict

The call

The clearest difference is rating: Kon21 at 5.0 against 아쿠아폴리스's 2.5. Kon21 also leads on in-app purchases (none vs 10) and update cadence (every 4 days vs every 5 weeks). 아쿠아폴리스's advantage is ratings volume (4 vs 1) and iOS requirement (7.0 vs 26.2). 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. 아쿠아폴리스 sells 10 one-off in-app purchases. Kon21 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Kon21 holds the better App Store score, 5.0 against 2.5. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

UpkeepUpdate frequency

아쿠아폴리스 ships an update every 5 weeks, Kon21 every 4 days. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.

Scorecard6 real differences · 4 level
아쿠아폴리스 versus Kon21: the parameters behind the verdict, then further details
Parameter아쿠아폴리스Kon21
PriceFreeFree
Rating2.5 (4 ratings)5.0 (1 ratings) — better
Positive reviews84.3% of reviews—
Number of ratings4 — better1
Update frequencyEvery 5 weeksEvery 4 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad, Apple Watch
Requires iOS7.0 — better26.2
Further details — not scored
Size268 MB19 MB
Age rating4+4+
DeveloperCandy Grill LLCRetroApps LLC

Customer experience

아쿠아폴리스

All ratings4 ratings
Positive25.0%
Neutral0.0%
Negative75.0%
Written reviews51 reviews
Positive84.3%
Neutral5.9%
Negative9.8%

Kon21

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

10 purchases

아쿠아폴리스

One-time10
  • Storage Cells$0.99
  • Territory sale$0.99
  • Inventory pack$0.99
Show 7 more
  • Rubies pack 7$4.99
  • Rubies pack 6$9.99
  • Rubies pack 5$14.99
  • Rubies pack 4$19.99
  • Rubies pack 3$29.99
  • Rubies pack 2$49.99
  • Rubies pack 1$99.99
None

Kon21

No in-app purchases

Questions

Is 아쿠아폴리스 free?
아쿠아폴리스 is free to download, with in-app purchases available.
Is Kon21 free?
Kon21 is free to download, with no in-app purchases.
Which has better reviews, 아쿠아폴리스 or Kon21?
Kon21 is rated higher. 아쿠아폴리스 averages 2.5 out of 5 from 4 ratings, while Kon21 averages 5.0 from 1 ratings.
Do 아쿠아폴리스 or Kon21 have ads?
Neither 아쿠아폴리스 nor Kon21 shows ads.
Which is updated more often, 아쿠아폴리스 or Kon21?
아쿠아폴리스 ships an update every 5 weeks, and Kon21 every 4 days. Most recently, 아쿠아폴리스 was updated on November 2, 2026 and Kon21 on November 5, 2026.

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