Fill one-line puzzle game vs its rivals

Side-by-side comparison against Fill one-line puzzle game's closest competitors — identity, store metrics, ratings & sentiment, and strategic intel.

Core Identity
DeveloperGAMINCAT, INC.UNICO STUDIOFTY LLC.Brightika, Inc.SmallStep Dev TeamRed cat studio-focused puzzle gameUNICO STUDIO庆龙 刘Brightika, Inc.AI Games FZ
CategoryGamesGamesGamesGamesGamesPuzzleGamesGamesGamesGames
PlatformAndroid, iOSAndroid, iOSAndroid, iOSiOS, AndroidiOS, AndroidAndroid, iOSiOS, AndroidiOSiOS, AndroidiOS, Android
Store Metrics
Rating4.6 / 54.8 / 54.7 / 54.7 / 54.6 / 54.9 / 54.8 / 54.6 / 54.5 / 54.7 / 5
Ratings Count39,7911,417,80610,54647,5734143497068,52040,940134,099
PriceFreeFreeFreeFreeFreeFreeFreeFreeFreeFree
Release DateMay 2, 2016Nov 12, 2019Apr 22, 2025Apr 3, 2020Dec 20, 2025Apr 10, 2020Feb 24, 2026Oct 15, 2019Jul 1, 2020Apr 13, 2022
Last UpdatedNov 26, 2024Apr 9, 2026Mar 13, 2026Mar 27, 2026May 14, 2026May 12, 2026Apr 19, 2026Nov 19, 2020Feb 2, 2026Apr 19, 2026
Sentiment & Reviews
Sentimentnegativemixednegativemixed--mixedmixednegative-
Score25/10065/10035/10045/100--45/10045/10025/100-
Praises
  • Simple puzzle mechanics provide a relaxing mental challenge for casual play sessions
  • High volume of available levels keeps players engaged for extended periods
  • Challenging puzzle mechanics effectively stimulate cognitive thinking and problem solving skills for players
  • High replayability and addictive nature keep users engaged during short daily play sessions
  • Challenging puzzle mechanics provide a satisfying mental workout for casual players during downtime
  • Core spot the difference gameplay provides a relaxing and mentally stimulating experience for casual players
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  • Mentally challenging puzzle design keeps players engaged through creative and non-linear level solutions
  • Challenging puzzle mechanics provide a satisfying mental workout for casual players
  • Entertaining and humorous artistic style keeps the experience lighthearted
  • Core puzzle concepts provide an engaging and intellectually stimulating experience for casual players
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Complaints
  • Excessive frequency of unskippable advertisements disrupts the core gameplay loop
  • Failure of paid ad-removal purchases to actually disable advertisements
  • Forced online connectivity requirements prevent offline play and trigger ad loading
  • Excessive ad frequency disrupts the core gameplay loop and creates a negative user experience
  • Aggressive monetization tactics and expensive hint systems gate progress for non-paying players
  • Excessive ad frequency disrupts the core gameplay loop and degrades the overall user experience
  • Technical instability and application crashes prevent consistent access to the game content
  • Monetization friction occurs when paid ad-removal fails to function as advertised for users
  • Excessive ad frequency disrupts the core gameplay flow and forces players to watch unwanted content
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  • Excessive ad frequency disrupts the core gameplay loop and creates a frustrating user experience
  • Excessive ad frequency after every level disrupts the core gameplay flow
  • Lack of new content updates leaves long-term players without progression
  • Technical instability and crashes prevent consistent access to the game
  • Aggressive ad frequency interrupts gameplay flow and makes the application feel unplayable
  • Weekly subscription pricing for ad removal is perceived as excessive and predatory
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Requests
  • Permanent ad removal option that functions correctly across all game sessions
  • Improved progress saving to prevent data loss when closing the application
  • Increased level volume to provide more content for long-term dedicated players
  • Reduced advertisement frequency to allow for longer uninterrupted gameplay sessions between levels
  • Non-timed game modes requested to accommodate players who prefer a slower, less stressful experience
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  • Transparent one-time purchase option to remove ads and improve overall game accessibility
  • Implementation of an offline mode to bypass mandatory advertisement interruptions
  • Expansion of the level library to provide sustained engagement for power users
  • Localized language support for non-English speakers to improve accessibility and game understanding
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Strategic Intel
Strengths
  • 2,000-level content library sustains long-term engagement
  • Meditative core loop fits casual commute-time usage
  • Free hint system lowers entry barrier
  • Editors' Choice badge across five markets sustains organic install velocity
  • Offline-first architecture maximizes accessibility in low-connectivity regions
  • Situational scene-manipulation mechanics drive repeat engagement
  • Thematic variety supports daily active usage
  • GDPR/CCPA compliance maintains market access
  • High-quality image library sustains engagement
  • Offline play capability reduces churn
  • Brain-training positioning attracts families
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  • Creative non-linear puzzle design sustains engagement
  • Offline-capable architecture captures low-connectivity market segments
  • Social challenge mode lowers acquisition cost via existing networks
  • Unique riddle design provides satisfying mental workout
  • Lateral-thinking puzzle design provides a distinct differentiator from standard logic games
  • Gamified IQ tracking loop reinforces the open-app habit for casual users
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Weaknesses
  • Paid ad-removal failure triggers deceptive-practice complaints
  • Forced online connectivity prevents offline play
  • High ad-frequency outweighs gameplay time
  • Ad-to-gameplay ratio is the primary churn driver
  • Premium tier weekly subscription cost exceeds casual-puzzle category medians
  • High ad-frequency drives negative sentiment
  • Technical instability causes session loss
  • Paid ad-removal features report functional failure
  • Paid ad-removal fails to persist
  • Excessive ad density disrupts flow
  • Technical lag during level transitions
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  • Aggressive ad-density drives high churn
  • Heart-based life system creates artificial friction
  • Technical instability causes progress regression
  • Excessive ad frequency drives high churn
  • Limited content library causes rapid exhaustion
  • Technical instability causes launch crashes
  • Aggressive ad-frequency post-level drives high churn among casual players
  • Weekly subscription pricing perceived as predatory by the user base
  • Technical progression blockers prevent completion of specific puzzle levels
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Pricingfreemiumfreemiumfreemiumfreemiumfreemiumfreemiumfreemiumfreefreemiumfree
MomentumMaintenanceActiveActiveMaintenanceIntense-ActiveZombieMaintenance-
Update Cadence3 versions, ~260d avg5 versions, 1 majors/6mo, ~22d avg5 versions5 versions, 5 majors/6mo, ~95d avg5 versions-5 versions, 1 majors/6mo, ~17d avg5 versions5 versions, 1 majors/6mo, ~49d avg-

Compare Fill one-line puzzle game head-to-head

Disclosure: Independent intel to help mobile builders succeed.

AI-powered analysis with editorial review, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by Fill one-line puzzle game, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

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