Comparison

Turtle World. vs KATOA

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

Head to head
About

Turtle World.

Nurture and grow virtual sea turtles in a relaxing simulation game. Follow simple care routines like feeding and cleaning to ensure your turtle thrives. Enjoy a peaceful experience at your own pace.

Highlights
  • Name and raise virtual turtles
  • Feed turtles every 3 days
  • Clean water diligently
  • Grow turtles through interaction
  • Relaxing BGM and gameplay
  • Paced, casual progression
Features
Read full description

Relax with healing a turtle and BGM! Your mission is to name and raise turtle. There are only two rules ・ Feed once every 3 days ・ Clean the water diligently when in contact with turtle. It is a loose fluffy game that you can proceed at your own pace even if you are busy. The longer you spend in contact with the whale, the faster the turtle will grow. Also, please note that the turtle will die if left unattended. Grow your favorite turtle!

About

KATOA

Defend the oceans by building vibrant underwater habitats and battling pollution. Play to earn real money that funds global environmental projects. Discover marine life, restore ecosystems, and become an ocean defender.

Highlights
  • Earn real money for environmental projects
  • Build underwater habitats
  • Discover and bond with sea creatures
  • Defeat pollution-based enemies
  • Explore ocean biomes
  • Design custom havens
Features
Read full description

Become a Guardian of Light! Defend the oceans from the toxic Blight and build breath-taking underwater habitats in KATOA. Just by playing, you’ll earn real money that will help fund environmental projects from around the globe that urgently need your help! Create reefs filled with colorful corals. Invite turtles, rays, dolphins, parrotfish, and other exotic sea creatures to your safe havens, and bond with them through their stories and shared adventures. Defeat the malignant Blight; foul invaders created from the ocean’s pollution. Restore these magical underwater worlds and climb the leaderboards of ocean defenders! Be a hero. Play the game. Save the world. ■ Earn real money that goes to saving our oceans just by playing the game ■ Meet a colorful cast of characters, with unique personalities and lots to say ■ Explore the world’s oceans and discover new biomes to reclaim and expand ■ Design your own havens with a variety of beautiful Flora ■ Defeat the toxic Blight that pollutes the world ■ Assemble a team of adventurous Fauna to embark on Quests and bring back valuable resources * Please note: KATOA works best on iPhone 8 and above. Need help? Just contact support@sankaristudios.com! We'd love to talk to you.

Screenshots

Turtle World.4 screens
KATOA4 screens

Verdict

The call

The clearest difference is rating: KATOA at 4.4 against Turtle World.'s 2.0. KATOA also leads on ads (none vs shown) and ratings volume (118 vs 1). Turtle World.'s advantage is in-app purchases (none vs 6) and review sentiment (92% vs 67%). On price, update cadence 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. KATOA sells 6 one-off in-app purchases. Turtle World. asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

KATOA holds the better App Store score, 4.4 against 2.0. That said, the two scores are not equally well evidenced: KATOA has 118 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 92% of Turtle World.'s written reviews are positive against 67% of KATOA's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Turtle World. ships an update every 4 weeks, KATOA monthly. Both last shipped on November 3, 2026.

Scorecard7 real differences · 3 level
Turtle World. versus KATOA: the parameters behind the verdict, then further details
ParameterTurtle World.KATOA
PriceFreeFree
Rating2.0 (1 ratings)4.4 (118 ratings) — better
Positive reviews92.5% of reviews — better66.7% of reviews
Number of ratings1118 — better
Update frequencyEvery 4 weeks — betterMonthly
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFree with in-app purchases
DevicesiPhone, iPod — betteriPhone
Requires iOS10.0 — better16.0
Further details — not scored
Size81 MB570 MB
Age rating4+4+
DeveloperBasement Apps, Inc.Sankari Studios, Inc.

Customer experience

Turtle World.

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews53 reviews
Positive92.5%
Neutral1.9%
Negative5.7%

KATOA

All ratings113 ratings
Positive85.0%
Neutral6.2%
Negative8.8%
Written reviews96 reviews
Positive66.7%
Neutral14.6%
Negative18.8%

User reviews

Turtle World.

From 1 App Store ratings

What we love

  • 🐢 Cute turtles
  • 😌 Relaxing gameplay
  • ✨ Soothing visuals and music
  • 👍 Simple and easy to play
  • 💖 Adorable animations

Room to improve

  • 🚫 Game not in English
  • 😵 Inappropriate ads shown
  • 🖱️ Cannot click 'receive x2' button
  • ⚖️ Water quality drops quickly
  • 🐢 Can be difficult to raise

KATOA

From 118 App Store ratings

What we love

  • 🌊 Beautiful ocean visuals
  • 🐠 Cute and diverse aquatic fauna
  • 🌱 Relaxing gameplay loop
  • 🌍 Supports environmental causes
  • 🎨 Gorgeous art style

Room to improve

  • 🐛 Frequent crashes and bugs
  • ⏱️ Slow progression and unlock process
  • 🔁 Repetitive daily quests
  • 🤖 Unintuitive or unclear mechanics
  • 💤 Lack of content and things to do

Bugs and requests

Turtle World.

Reported bugs

2 issues
  • Cannot click 'receive x2' button
  • Inappropriate ads are displayed

Requested features

3 requests
  • Change game language to English
  • Remove disturbing ads
  • Fix button for receiving rewards

KATOA

Reported bugs

5 issues
  • Quests and fauna getting stuck
  • Inability to expand certain areas
  • Graphical glitches and UI issues
  • Login and loading problems
  • Unresponsive or buggy controls

Requested features

5 requests
  • More unlockable areas and expansions
  • Ability to rename or customize fauna
  • Improved tutorial and in-game help
  • Additional mini-games or activities
  • Smoother combat and raid mechanics

In-app purchases

None

Turtle World.

No in-app purchases

6 purchases

KATOA

One-time6
  • Handful of Stars$0.99
  • Bunch of Stars$4.99
  • Pile of Stars$9.99
Show 3 more
  • Bag of Stars$19.99
  • Barrel of Stars$39.99
  • Chest of Stars$79.99

Questions

Is Turtle World. free?
Turtle World. is free to download, with no in-app purchases.
Is KATOA free?
KATOA is free to download, with in-app purchases available.
Which has better reviews, Turtle World. or KATOA?
KATOA is rated higher. Turtle World. averages 2.0 out of 5 from 1 ratings, while KATOA averages 4.4 from 118 ratings.
Do Turtle World. or KATOA have ads?
Turtle World. shows ads; KATOA does not.
Which is updated more often, Turtle World. or KATOA?
Turtle World. ships an update every 4 weeks, and KATOA monthly. Most recently, Turtle World. was updated on November 3, 2026 and KATOA on November 3, 2026.

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