Report updated Apr 20, 2026
Fifteen - 15
For puzzle enthusiasts and logic game players who appreciate deep customization, performance tracking, and an ad-free, minimalist gaming environment.
Fifteen - 15 is a market-leading games app that is completely free. With a 5.0/5 rating from 113 reviews, it delivers strong user satisfaction. Users particularly appreciate ad-free experience, though input & ui glitches remains a common concern.
What is Fifteen - 15?
Current Momentum
v1.7 · 1w ago
ZombieFifteen - 15 released a selector for scramble methods in April 2026, but the app has seen only two updates over an eight-year period.
Active Nemesis
Classic Number Game -Numpuzzle
By Mrudul Babariya
Other Rivals
7-Day Rank Pulse 🇺🇸
GamesNo ranking data
Rating Pulse 🇺🇸
Recent User Mood
What makes this app unique?
What Does It Look Like?
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What Are The Key Features?
Offers classic, snake, and spiral puzzle types for varied gameplay
Tracks solve history and allows users to review their solutions for speedrunning analysis
Allows users to edit or create custom puzzle scrambles
Supports board sizes ranging from 3x3 up to 10x10
How much does it cost?
- Completely free to play with no advertisements
The app follows a non-monetized, hobbyist-driven model, leveraging the absence of ads as its primary user acquisition and retention lever.
Who Built It?
TEDRA SOFT SRL
Providing specialized health utilities and classic casual games for families and hobbyists seeking simple, functional mobile experiences.
Portfolio
13
Apps
What other apps does TEDRA SOFT SRL make?
Self Help Classics .
Tap Soccer - Champions
Acertijos y Adivinanzas
Smart Riddles - Brain Teasers
Child BMI Calculator (Body Mass Indicator for Children and Adolescents)
Bistro Cook
Explore the full TEDRA SOFT SRL report
Portfolio breakdown, audience, momentum, and every app published by TEDRA SOFT SRL.
What do users think recently?
High confidence · Latest 100 of 113 total reviews analyzed · Based on 113 reviews. Signal may be noisy.
How did the latest release land?
What is the recent mood?
Recent user voice shows a thrilled sentiment. Users appreciate ad-free experience and fluid controls & performance, but report input & ui glitches and feature requests.
What Users Love
What Frustrates Users
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 Fifteen - 15?
How's The Games Market?
Market outlook for this category
Available very soon
The rivals identified
The outtake for Fifteen - 15
Strengths to defend, gaps to attack
Core Strengths
- Strictly ad-free model driving high user loyalty
- Deep customization (3x3 to 10x10 grids)
- Advanced speedrunning tools like Replays and Scramble Editor
Critical Frictions
- Reported input lag and UI glitches affecting core gameplay
- Lack of social or competitive features (leaderboards)
- Stale scramble logic for larger grid sizes
Growth Levers
- Implement global leaderboards to engage the speedrunning community
- Introduce 'Zen' branding to compete with modern block-puzzle trends
- Add Hint/Undo systems to improve accessibility for casual users
Market Threats
- High-velocity competitors (Easybrain, Tripledot) with better retention hooks
- Shift in user preference toward progression-based puzzles (Roll the Ball)
What are the next best moves?
Resolve input lag and UI responsiveness issues
Input glitches are a medium-frequency complaint that directly undermines the app's positioning as a high-performance speedrunning tool.
Implement Global Leaderboards
This is a top user feature request and a key gap compared to competitors like Roll the Ball and Numpuzzle.
Update Scramble Algorithms for 5x5+ grids
Users report identical scrambles on larger grids, which reduces replayability and the value of the 'Multiple Variations' feature.
Feature Gaps vs Competitors
- Hint and Undo systems (available in Classic Number Game - Numpuzzle)
- Level-based progression system (available in Roll the Ball)
- Daily Puzzles and Time Trials (available in Flow Free)
- Multiplayer Mode (available in Roll the Ball)
Key Takeaways
If I were the PM, I would prioritize fixing the input lag to maintain the app's 'gold standard' status for speedrunners while introducing a leaderboard to drive organic competition. The ad-free model is a massive competitive advantage, but technical stability and a lack of social hooks are the primary risks to long-term retention.
Where Is It Heading?
Improving
v1.7.0 updated April 2026 — indicates active feature investment, not maintenance mode.
Thrilled user base regarding ad-free experience — provides a strong moat against commercial rivals.
Emerging reports of input lag — a critical risk for a speedrunning-focused app.