Sim Aquarium vs Koitopia
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Sim Aquarium
Create and manage your own 3D aquarium, raising fish from babies to adults. Customize your underwater world with vibrant backgrounds and decorations, and interact with friends' aquariums. Buy, sell, and collect a variety of marine life.
- Buy, raise, and sell fish
- Create fish collections
- Customize aquariums with backgrounds and decor
- Explore a 3D aquatic world
- Interact with friends via Game Center and Facebook
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Collect fish, care for them and decorate your own 3D aquarium. Turn an empty tank into an underwater home, one fish and one decoration at a time. YOUR AQUARIUM, YOUR WAY • Feed your fish and watch them grow. • Breed fish and expand your collection. • Choose backgrounds, coral, plants and decorations for your tank. • Complete daily goals and treasure orders, then collect rewards. • Play match-3 puzzles and other minigames for extra variety. • Visit friends’ aquariums and send gifts. Enjoy watching your fish swim, or return for a small daily goal. Whether you prefer collecting sea creatures or designing a reef, your aquarium gives you something to build on. Start with your first fish and make the tank your own. Facebook: facebook.com/FishLiveApp Support: support@mongko.com Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Koitopia
Breed and grow unique Koi varieties in a virtual pond. Complete quests, solve puzzles, and customize your environment. Showcase your prized fish in this relaxing 3D simulation game.
- Koi breeding mechanics
- Pond customization
- Daily quests and puzzles
- Event-based challenges
- Mini-games (Feed the Fish, Catch the Food)
- Ornamental Pond showcase
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Koitopia is a captivating mobile game that immerses you in the world of Koi. Begin your journey with a starter pond filled with Koi and explore genetics and breeding mechanics to create unique and vibrant Koi varieties. Engage in daily quests, solve puzzles, progress through levels, and participate in event-based challenges to earn KOIns, experience, and resources. Customize your ponds, participate in mini-games like Feed the Fish and Catch the Food, and showcase your best Koi in the Ornamental Pond. Experience a semi-realistic 3D art style with portrait orientation gameplay, powered by the Unity Engine. Whether you're a casual gamer or an aspiring breeder, Koitopia offers a relaxing and rewarding experience as you nurture and grow your Koi collection.
Screenshots
Verdict
The clearest difference is rating: Sim Aquarium at 4.1 against Koitopia's 2.3. Sim Aquarium also leads on review sentiment (79% vs 47%) and update cadence (every 10 days vs every 5 weeks). Koitopia's advantage is ads (none vs shown) and iOS requirement (13.0 vs 15.0). On price, ratings volume, in-app purchases and monetization model 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
Both are free to download. Sim Aquarium sells 10 one-off in-app purchases and Koitopia sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Sim Aquarium holds the better App Store score, 4.1 against 2.3. Both are backed by a comparable volume of ratings — 17 and 18 respectively. Written reviews point the same way: 79% of Sim Aquarium's written reviews are positive against 47% of Koitopia's.
Sim Aquarium ships an update every 10 days, Koitopia every 5 weeks. The most recent releases landed on October 23, 2026 and October 21, 2026 respectively.
| Parameter | Sim Aquarium | Koitopia |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (17 ratings) — better | 2.3 (18 ratings) |
| Positive reviews | 78.9% of reviews — better | 47.1% of reviews |
| Number of ratings | 17 | 18 — better |
| Update frequency | Every 10 days — better | Every 5 weeks |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 207 MB | 352 MB |
| Age rating | 4+ | 4+ |
| Developer | 达 雷 | Homeworx Consulting Pty Ltd |
Customer experience
Sim Aquarium
Koitopia
Bugs and requests
Sim Aquarium
Reported bugs
8 issues- Game crashes frequently
- Game refuses to open or load
- Purchased items not received
- Game frozen
- Missing gems/rewards
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- Tanks disappeared
- Snowing effect bug
- Ads pop up during tutorial
Requested features
9 requests- More levels
- More fish breeds and decorations
- More challenges
- Option to remove ads
- Ability to email/message developers
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- Confirmation for purchases
- New fish species like turtles, sharks, etc.
- Faster evolution of fish/tank
- Ability to turn off snow effect
Koitopia
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Sim Aquarium
- Pile of Gems$1.99
- Mound of Gems$4.99
- Aquarium Special Pack$4.99
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- Bag of Gems$9.99
- Rare Crab Breeding Pack$9.99
- Sack of Gems$19.99
- Super Aquarium Pack$19.99
- Basket of Gems$29.99
- Box of Gems$49.99
- Chest of Gems$99.99
Koitopia
- Water Koi Fortune Pack$0.99
- Koi Spring Bundle$4.99
- Koi Ripples Cache$9.99
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- Koi Tranquility Collection$24.99
- Koi Floating World Trove$79.99
