| Core Identity |
| Developer | TapNation | IEC Global Pty Ltd | Kwalee Ltd | ZephyrMobile | Spica Publishing | IEC Global Pty Ltd | Easybrain | Tripledot Studios | WeMaster | Mind Your Logic |
| Category | Games | - | - | - | - | Puzzle | Puzzle | Games | - | - |
| Platform | iOS, Android | - | - | - | - | iOS, Android | Android | Android, iOS | - | - |
| Store Metrics |
| Rating | 4.5 / 5 | - | - | - | - | 4.7 / 5 | 4.5 / 5 | 4.7 / 5 | - | - |
| Ratings Count | 29,888 | - | - | - | - | 324,287 | 1,263,159 | 656,220 | - | - |
| Price | Free | - | - | - | - | Free | Free | Free | - | - |
| Release Date | Nov 14, 2019 | - | - | - | - | Jun 26, 2020 | Nov 22, 2019 | Mar 11, 2020 | - | - |
| Last Updated | May 14, 2025 | - | - | - | - | Apr 20, 2026 | Mar 24, 2026 | May 28, 2026 | - | - |
| Sentiment & Reviews |
| Sentiment | negative | - | - | - | - | negative | mixed | mixed | - | - |
| Score | 25/100 | - | - | - | - | 25/100 | 55/100 | 45/100 | - | - |
| Praises | - Simple and soothing puzzle mechanics provide a relaxing experience for short play sessions
- Challenging puzzle design keeps players engaged during the initial progression stages
| - | - | - | - | - Core puzzle mechanics provide a relaxing and mentally stimulating experience for casual daily play
| - Engaging Gameplay
- Simple and Accessible
| - Meditative and soothing puzzle mechanics provide a reliable daily stress relief habit for players
| - | - |
| Complaints | - Game-breaking bugs post-update cause levels to repeat or freeze entirely on launch
- Excessive ad frequency and intrusive content disrupt the core gameplay flow
- High weekly subscription pricing creates significant friction for casual players
| - | - | - | - | - Post-update visual changes introduce distracting glare effects that cause eye strain and visibility issues
| - Excessive Advertising
- Rigged Difficulty
| - Excessive ad frequency interrupts the flow of gameplay and forces frequent app restarts
| - | - |
| Requests | - Additional content levels are requested to extend the gameplay experience for advanced players
- Dark mode implementation to reduce eye strain during nighttime play sessions
| - | - | - | - | - Toggle settings for visual effects to allow players to revert to the original flat design
| - | - Purchase option for an ad-free experience to remove current monetization friction
| - | - |
| Strategic Intel |
| Strengths | - Four-mode difficulty structure provides variety missing in linear rivals
- Reward-based coin sink increases session frequency via progression loops
| - | - | - | - | - Offline-first architecture enables play in low-connectivity environments
- Simple one-finger input maximizes top-of-funnel acquisition
| - Massive social proof (1.2M+ ratings)
- Unique 9x9 Sudoku clearing mechanic
- Strong live-ops with Seasonal Events and animated rewards
| - Meditative puzzle loop sustains daily habit
- Offline-first architecture captures transit-based engagement
| - | - |
| Weaknesses | - Subscription price at $5.99/week is above category median
- 0.6★ rating gap between Android and iOS platforms
- No cloud-save functionality despite user demand
| - | - | - | - | - High ad-density disrupts core gameplay flow
- Visual update causes physical eye strain
- Lack of reliable cloud-save sync
| - Aggressive ad frequency (top churn risk)
- Perceived 'rigged' difficulty spikes
- Misleading UA creative vs actual gameplay
| - Aggressive ad-load triggers high churn
- Post-update stability issues erode trust
- No paid ad-free tier
| - | - |
| Pricing | subscription | - | - | - | - | freemium | freemium | freemium | - | - |
| Momentum | Zombie | - | - | - | - | Active | - | Active | - | - |
| Update Cadence | 2 versions, ~145d avg | - | - | - | - | 5 versions, 1 majors/6mo, ~21d avg | - | 5 versions, ~10d avg | - | - |
