Comparison

Perfect World vs Koi

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

Head to head
About

Perfect World

Embark on an epic Eastern fantasy adventure in a vast 3D open world. Choose your path as a healer or damage dealer, customize your character with intricate detail, and engage in skill-based combat and large-scale PvP. Find companions and explore a visually stunning realm.

Highlights
  • Male Cleric class with healing/buff or damage paths
  • Skill-based combat and tactical feedback
  • 10,000-player cross-server wars
  • Battle Royale PvP modes
  • Seamless 3D open-world exploration
  • Ultra-HD character creator
  • Real-time voice chat and emotes
Features
Read full description

Perfect New Era: Male Cleric Arrives – The battle for Lunar Glade is imminent. The Prologue: Male Cleric Rises – Ascend or Fall One thought to become a God, one thought to embrace the Demon. Sage Path: Master the art of healing and buffs to dictate the flow of battle. Demon Path: Unleash explosive burst damage to dominate the frontlines. Your choice will reshape the world! The Bounty: Claim 10 Million in Epic Gifts! Start your journey with a massive 10-million value gift pack—limited time only! We’ve paved the road to greatness from your very first step. Don't just play the game; become a legend! The Conflict: Master the Art of Combat Experience a return to skill-based strategy with revamped tactical feedback! From the classic Lunar Glade to 10,000-player cross-server wars and pulse-pounding Battle Royale PvP, this is the ultimate proving ground. The Boundless: Explore a Seamless 3D Open World Powered by a next-gen 3D engine, witness a cinematic Eastern fantasy masterpiece. From soaring above the highest peaks to diving into the deep-sea abyss, every frame is a visual feast. The Persona: Define Your Ultimate Aesthetic Our ultra-high-definition character creator lets you sculpt every detail. From facial contours to unique temperaments, whether a cold-blooded Swordbreaker or a breathtaking Vulpine, you are one of a kind. The Encounter: Find Your Soulmate Adventure is better together! Connect via real-time voice chat, express yourself with intimate emotes, and traverse stunning landscapes on multi-person mounts. It’s more than a meeting; it’s a journey shared! [System Requirements] Minimum OS: iOS 12 Minimum RAM: 2 G Please grant the necessary device permissions to fully enjoy all features of this game. "Storage" is required to save game data and related services.

About

Koi

Control two fish simultaneously in this challenging reflex game. Dodge falling obstacles with precise timing across multiple game modes. Utilize a temporary invincibility power-up to survive longer and compete on global leaderboards.

Highlights
  • Control two fish simultaneously
  • Three distinct game modes
  • Temporary invincibility power-up
  • Game Center leaderboards
  • Simple tap controls
Features
Read full description

Koi Rush is a reflex game built around a simple but brutal idea, control two fish at the same time. Your left thumb controls the white fish. Your right thumb controls the black fish. Obstacles fall, you dodge. One hit and it's over. Three Modes: -Solo — one fish, four lanes. The left side is dark, the right side is light. Your fish changes color as it crosses between them. Simple to learn, hard to master. -Classic — both fish dodge falling obstacles at the same time. Stay alive as long as you can. -Insane — the left side is flipped. Your white fish starts at the top while obstacles rise from below. Your brain will fight itself. Phase Meter: -Dodge enough obstacles and your phase meter fills up. Tap it to go invincible for a few seconds, use it wisely. Game Center Leaderboards: -Compete globally across all three modes. See how long you last against the world. Simple controls. No tutorials needed. Just tap and survive.

Screenshots

Perfect World4 screens
Koi4 screens

Verdict

The call

The clearest difference is review sentiment: Koi at 100% against Perfect World's 39%. Koi also leads on rating (5.0 vs 3.8) and in-app purchases (none vs 10). Perfect World's advantage is ads (none vs shown) and ratings volume (17 vs 1). On price 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. Perfect World sells 10 one-off in-app purchases. Koi asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Koi holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Perfect World has 17 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 39% of Perfect World's written reviews are positive against 100% of Koi's.

UpkeepUpdate frequency

Perfect World ships an update every 2 months, Koi every 5 days. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

Scorecard9 real differences · 1 level
Perfect World versus Koi: the parameters behind the verdict, then further details
ParameterPerfect WorldKoi
PriceFreeFree
Rating3.8 (17 ratings)5.0 (1 ratings) — better
Positive reviews39.3% of reviews100.0% of reviews — better
Number of ratings17 — better1
Update frequencyEvery 2 monthsEvery 5 days — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS12.0 — better17.6
Further details — not scored
Size3.1 GB15 MB
Age rating17+9+
DeveloperPILI STARSHIPMohamed Kaid

Customer experience

Perfect World

All ratings16 ratings
Positive68.8%
Neutral0.0%
Negative31.3%
Written reviews112 reviews
Positive39.3%
Neutral4.5%
Negative56.3%

Koi

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Perfect World

Reported bugs

2 issues
  • Character movement issues when browsing items
  • Inability to create or join guilds

Requested features

3 requests
  • Add controller support
  • Improve character customization options
  • Increase visibility of UI elements

Koi

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Perfect World

One-time10
  • Top up $0.99$0.99
  • Top up $1.99$1.99
  • Top up $2.79$2.79
Show 7 more
  • Top up $4.99$4.99
  • Top up $7.99$7.99
  • Top up $9.99$9.99
  • Top up $14.99$14.99
  • Top up $29.99$29.99
  • Top up $49.99$49.99
  • Top up $99.99$99.99
None

Koi

No in-app purchases

Questions

Is Perfect World free?
Perfect World is free to download, with in-app purchases available.
Is Koi free?
Koi is free to download, with no in-app purchases.
Which has better reviews, Perfect World or Koi?
Koi is rated higher. Perfect World averages 3.8 out of 5 from 17 ratings, while Koi averages 5.0 from 1 ratings.
Do Perfect World or Koi have ads?
Koi shows ads; Perfect World does not.
Which is updated more often, Perfect World or Koi?
Perfect World ships an update every 2 months, and Koi every 5 days. Most recently, Perfect World was updated on November 4, 2026 and Koi on October 31, 2026.

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