| Core Identity |
| Developer | Oliver Lieven | SangHeon Kim | LandShark Games Pte. Ltd. | Calm.com | Big Duck Games LLC | Pavel Dobryakov | Playrix |
| Category | Entertainment | Games | Games | Health & Fitness | Games | Entertainment | Games |
| Platform | iOS | Android, iOS | iOS, Android | iOS | iOS, Android | iOS, Android | Android, iOS |
| Store Metrics |
| Rating | 0.0 / 5 | 4.5 / 5 | 4.8 / 5 | 4.7 / 5 | 4.8 / 5 | 4.9 / 5 | 4.6 / 5 |
| Ratings Count | 0 | 24,180 | 29,282 | 3,296 | 392,918 | 86,476 | 1,142,384 |
| Price | Free | Free | Free | Free | Free | Free | Free |
| Release Date | Mar 25, 2026 | Jul 15, 2016 | Dec 14, 2017 | Aug 26, 2025 | Jun 7, 2012 | Nov 20, 2018 | Dec 10, 2015 |
| Last Updated | Apr 17, 2026 | May 8, 2026 | Apr 29, 2026 | Mar 5, 2026 | Jan 16, 2026 | Feb 8, 2026 | May 18, 2026 |
| Sentiment & Reviews |
| Sentiment | - | mixed | mixed | negative | positive | excellent | negative |
| Score | - | 35/100 | 45/100 | 32/100 | 75/100 | 92/100 | 35/100 |
| Praises | - | - Relaxing atmosphere and high-quality soundtrack provide a calming experience for long-term players
| - Relaxing core gameplay loop provides a calming experience for long-term players
| - Content Quality
- App Performance
| - Satisfying puzzle mechanics provide a relaxing and addictive mental challenge for daily play
| - Absence of intrusive advertisements creates a relaxing and uninterrupted user experience for all ages
- Fluid simulation mechanics provide effective stress relief and anxiety management for diverse user groups
| - Addictive match-three puzzle mechanics provide engaging entertainment during short-form play sessions
- Aquarium decoration and fish naming features offer a relaxing creative outlet for players
- Absence of forced advertisements allows for uninterrupted gameplay and improved user experience
|
| Complaints | - | - Aggressive advertisement frequency and intrusive placement disrupt the intended relaxing gameplay experience
| - Aggressive and unskippable ad frequency disrupts the intended relaxing atmosphere of the game
| - Redundancy and Value
- Technical and UX Limitations
| - Aggressive advertising frequency interrupts the flow of gameplay and frustrates active users
| - Feature parity gaps between the mobile application and the web-based version frustrate power users
| - Aggressive difficulty spikes post-update force players into purchasing boosters to progress through levels
- Loss of long-term game progress after updating or switching devices causes significant user frustration
- Misleading marketing advertisements create false expectations regarding the actual in-game experience
|
| Requests | - | - Improved support for larger screen formats to accommodate tablet and desktop users
| - Real-time prey tracker on the pond screen to simplify collection management
| - | - Additional level content requested by long-term players who have completed all current challenges
| - Expanded customization options for background colors and visual settings to match web capabilities
| - Implementation of a cloud-based account recovery system to prevent permanent loss of progress
- Enhanced social features including direct team invitations and gem sharing between friends
|
| Strategic Intel |
| Strengths | - Minimalist, tactile interaction loop creates immediate meditative state without menu-driven clutter
- Physics-based flocking behavior provides a high-fidelity visual experience
| - VR mode differentiates visual experience
- Consistent event cycles maintain veteran engagement
| - Meditative simulation loop creates high switching costs [Retention Metric]
- 200+ koi patterns provide deep collection-based retention [Feature Mechanism]
| - Exclusive celebrity talent (Harry Styles, Cillian Murphy)
- Strong brand synergy with Calm
- Native Apple HealthKit integration
| - Color-blind accessibility labels expand addressable market
- 2,500+ level library creates high switching costs
- Game Center integration gamifies long-term progress
| - Editors' Choice badge sustains organic install velocity
- Ad-free UX functions as a meditation tool
| - Creative meta-layer provides long-term retention anchor [User Sentiment]
- Absence of forced ads improves session quality [User Sentiment]
- Seasonal expeditions drive time-gated IAP conversion [Feature Analysis]
|
| Weaknesses | - One-time purchase model limits long-term revenue potential compared to subscription-based wellness competitors
- Lack of structured progression loop reduces long-term retention
| - Premium tier pricing above category median
- 0.48★ Android-iOS rating gap
| - High-frequency unskippable ads break Zen value [Sentiment Theme]
- Technical instability and progress loss [Review Data]
- Pay-to-win perception in progression [Sentiment Theme]
| - Lack of offline mode for travel
- High battery consumption during playback
- Perceived AI-generated voice content
| - Ad-close button failure rate creates high friction
- Interstitial frequency exceeds user tolerance
- Lack of meta-progression layer limits session depth
| - 0.01★ Android-iOS rating gap
- No integrated audio or music
- Missing web-version color wheel
| - High-level account reset bugs during migration [User Sentiment]
- Aggressive difficulty spikes post-update [User Sentiment]
- Misleading marketing vs actual gameplay [User Sentiment]
|
| Pricing | freemium | freemium | freemium | subscription | freemium | free | freemium |
| Momentum | Intense | - | Intense | Maintenance | Maintenance | Maintenance | Active |
| Update Cadence | 4 versions | - | 5 versions | 5 versions, ~8d avg | 5 versions, 4 majors/6mo, ~313d avg | 2 versions, 2 majors/6mo, ~0d avg | 5 versions, 5 majors/6mo, ~14d avg |
