Report updated May 5, 2026
Stack is a challenged games app that is free with in-app purchases. With a 4.1/5 rating from 501.1K reviews, it faces significant user friction. Users particularly appreciate simple and relaxing core stacking mechanics provide a satisfying experience for casual play sessions, though intrusive advertisement frequency disrupts the flow of gameplay and degrades the overall user experience remains a common concern.
What is Stack?
Stack is a hyper-casual arcade game for mobile devices where users stack blocks with precise timing.
Users hire Stack for short, high-focus sessions that provide a quick sense of accomplishment without requiring a long-term time investment.
Current Momentum
v3.69 · 1w ago
Maintenance- Ships UI navigation and visual updates.
- Maintains performance-focused bug fix cadence.
Active Nemesis
Color Switch
By Color Switch Phoenix
Other Rivals
7-Day Rank Pulse 🇺🇸
ActionRating Pulse 🇺🇸
Recent User Mood
What makes this app unique?
What Does It Look Like?
What Are The Key Features?
Core gameplay loop requiring precise timing to stack blocks as high as possible
Competitive ranking system allowing users to compare scores against a global player base
Integrated system within the publisher portfolio to promote other hyper-casual titles to the existing user base
How much does it cost?
- Free-to-play with ad support
- In-app purchases available
Monetization relies on ad-supported gameplay and in-app purchases within a free-to-play framework.
Who Built It?
Ketchapp
Providing casual gamers with high-intensity, short-session arcade experiences designed for quick breaks and reflex testing.
Portfolio
13
Apps
What other apps does Ketchapp make?
2048
Art Blitz
Prince of Persia : Escape
Kungfu Ragdoll
Prince of Persia: Escape 2
Ground Breaking 3D
Explore the full Ketchapp report
Portfolio breakdown, audience, momentum, and every app published by Ketchapp.
What do users think recently?
High confidence · Latest 100 of 145 total reviews analyzed · Based on 145 reviews. Signal may be noisy.
How did the latest release land?
What is the recent mood?
Recent user voice shows a frustrated sentiment. Users appreciate simple and relaxing core stacking mechanics provide a satisfying experience for casual play sessions, but report intrusive advertisement frequency disrupts the flow of gameplay and degrades the overall user experience.
What Users Love
What Frustrates Users
What Users Want
View the full user-sentiment analysis
Mood gauge, ratings & review-volume history, every praise / complaint / request, and sentiment over time.
What is the competitive landscape for Stack?
How's The Games Market?
How does it evolve in the Games market?
Stack currently holds the #93 Free position in the US Games category. The decline of 7 spots in the latest rankings signals that the current ad-heavy monetization is failing to retain users against more balanced casual titles.
Rank progression
133 active rankings tracked — 30-day window
The rivals identified
Nemeses(1)
Directly competes in the 'minimalist reflex-based stacking/timing' genre with high update frequency.
Differentiators
- Utilizes complex color-matching mechanics that force higher cognitive load than simple block stacking.
- Maintains a high-velocity update cadence with eight releases in the last six months.
Contenders(1)
Dominates the same casual hyper-casual reflex niche with massive scale and frequent content iteration.
Differentiators
- Leverages Voodoo's massive cross-promotion network to maintain dominance in the hyper-casual reflex category.
- Implements a vertical-descent physics model that provides a distinct alternative to the target's vertical-stacking mechanic.
Same space(6)
High-quality casual arcade title sharing the same 'simple-to-learn, hard-to-master' design philosophy.
Differentiators
- Employs a massive collection-based meta-game that drives long-term player retention through character unlocks.
- Features a distinct voxel-art aesthetic that has become a recognizable industry standard for casual games.
Adjacent rhythm-based platformer that shares the target's focus on high-difficulty, repetitive reflex gameplay.
Differentiators
- Integrates complex level-editor tools that allow for user-generated content and community-driven longevity.
- Synchronizes gameplay mechanics with high-energy soundtracks to create a rhythmic flow state for players.
Legacy title that defined the vertical-climbing sub-genre, serving as a benchmark for simple, addictive mechanics.
Differentiators
- Established brand equity as a foundational title in the mobile vertical-platformer genre.
- Utilizes tilt-based control schemes that offer a different tactile experience than the target's tap-to-stack.
Operates in the same casual gaming category with a focus on physics-based collision mechanics.
Differentiators
- Features vehicle-based combat mechanics that shift the focus from precision timing to chaotic interaction.
- Maintains a consistent content pipeline with 10 releases in the last six months to drive retention.
Adjacent sub-genre focusing on short-session, skill-based movement challenges within the same casual gaming ecosystem.
Differentiators
- Incorporates competitive multiplayer racing elements that provide a social layer absent in the target app.
- Utilizes a 3D character-based visual style that contrasts with the target's abstract block-based graphics.
Shares the hyper-casual 'one-tap' control scheme and minimalist aesthetic common in the target's category.
Differentiators
- Aggressive release schedule of 17 updates in six months signals rapid feature testing and optimization.
- Focuses on physics-based obstacle navigation rather than the static precision stacking found in the target.
Compare Stack against every rival
All rivals in one side-by-side table — identity, store metrics, ratings & sentiment, and strategic intel — plus a head-to-head page for each.
The outtake for Stack
Strengths to defend, gaps to attack
Core Strengths
- Cross-promotion network across 200+ titles reduces acquisition costs
- Offline-play capability sustains engagement in low-connectivity environments
Critical Frictions
- Ad-frequency complaints are the #1 churn driver
- Technical stuttering during ad-loading disrupts the core loop
Growth Levers
- Implement a non-intrusive rewarded-ad model to replace forced interstitials
- Introduce seasonal leaderboard challenges to drive retention
Market Threats
- Rapidly growing titles like Bridge Race utilize innovative resource-collection mechanics
- High ad-load drives users to competitors
What are the next best moves?
Pivot ad-model to rewarded-interstitials because ad-frequency is the #1 churn driver → increase session retention
Sentiment analysis identifies ad frequency as the primary reason for uninstalls.
Trade-off: Pause the development of new cosmetic block skins — ad-retention has 3x the impact on DAU.
Audit ad-loading logic because technical stuttering is a top-3 complaint → stabilize the core loop
Users report screen freezes during ad transitions, leading to lost progress.
Trade-off: Delay the next leaderboard UI refresh — performance stability is a prerequisite for user retention.
A counter-intuitive read
The high ad-load is not just a monetization choice, it is a deliberate strategy to funnel users into the publisher's 200+ title portfolio, sacrificing individual app longevity for network-wide traffic.
Feature Gaps vs Competitors
- Real-time multiplayer racing (available in Fun Race 3D but absent here)
- User-generated content tools (available in Geometry Dash World but absent here)
Key Takeaways
Stack relies on a high-frequency ad model that is actively cannibalizing its user base, so the PM must pivot to rewarded-ad mechanics to stabilize retention before the chart rank slips further.
Where Is It Heading?
Declining
The hyper-casual market is shifting toward physics-based, dynamic session experiences that offer more variety than static stacking. Stack's reliance on aggressive ad-interstitials leaves it vulnerable to competitors that prioritize session flow, so the PM must shift to a rewarded-ad model to prevent further churn.
Intrusive ad frequency is driving high churn, which directly correlates with the recent 7-spot drop in chart rankings.
Technical stuttering during ad transitions is eroding the user experience, leading to negative sentiment that suppresses new-user conversion.