Report updated Apr 12, 2026

⊷ ONE LINE is an established games app that is completely free. With a 4.7/5 rating from 328 reviews, it shows polarized user reception.

What Is ⊷ ONE LINE?

⊷ ONE LINE is a minimalist brain-training puzzle game that positions itself as a 'brain snack' for cognitive improvement. Its core value proposition centers on simple yet tricky puzzles that claim to improve IQ, supported by a unique Progressive IQ Tracking system. While it maintains a high 4.7-star rating, the app is currently in maintenance mode, having not been updated since June 2019, which places it at a disadvantage against more active competitors like 1LINE and Fill One Line.

Current Momentum

v1.2 · 83mo ago

Zombie

ONE LINE introduced IQ prediction at level 10 and adjusted level difficulty in its last update. The app has not been updated since June 2019.

AI-powered deep analysis surfacing high-signal insights. Still in beta, accuracy improves daily. For informational purposes only.

Active Nemesis

1LINE one-stroke puzzle game

1LINE one-stroke puzzle game

By GAMINCAT

Other Rivals

Orixo
Flow Free
I Love Hue
Knotwords
Railbound

7-Day Rank Pulse 🇺🇸

No ranking data

Main Category

GamesGrossing
AI-powered deep analysis surfacing high-signal insights. Still in beta, accuracy improves daily. For informational purposes only.

Recent User Mood 🇺🇸

Gathering signals...

What makes this app unique?

What Does It Look Like?

How Is The App's Momentum Right Now?

Loading...

What Are The Key Features?

Progressive IQ TrackingDifferentiator

Provides qualitative and analytical IQ results based on user performance and progress through levels.

Minimalist Design & AudioStandard

A clean, aesthetic interface paired with soothing music to create a relaxing, immersive environment.

Hint SystemStandard

Provides assistance for users struggling with difficult puzzle levels.

Social Ranking & SharingStandard

Allows users to share solutions and compare progress via ranking tables.

Device-Friendly PerformanceBasic

Optimized to be battery-efficient and lightweight on device memory.

Who is it for & how much does it cost?

Target Audience

Casual gamers and individuals looking for a quick, daily mental exercise to improve logic skills and creativity.

Pricing

Free
  • Free to play

The app is positioned as a free, lightweight utility. No explicit subscription or IAP tiers are mentioned, suggesting a potential ad-supported model or simple brand-building utility for the developer.

What do users think recently?

Gathering public signals...

Sentiment analysis will be available soon

What is the competitive landscape for ⊷ ONE LINE?

How's The Games Market?

Market outlook for this category

Available very soon

Games Market Trend

Games market trend & dynamics

Available very soon

The rivals identified

Contenders

-

Unique 'number-based' filling mechanic that adds a layer of mathematical logic

-

Superior ambient soundscape and minimalist aesthetic consistency

Peers

I Love Hue

I Love Hue

4.8 (276K)

Zut!

A peer in the 'minimalist/relaxing' puzzle space that focuses on color perception rather than line logic, attracting the same demographic.

-

Focuses on visual harmony and color theory rather than analytical IQ

-

Stronger emphasis on the 'meditative' aspect of puzzle solving

New Kids on the Block

-

Combines spatial logic with vocabulary in a way that feels fresh

-

Strong 'daily habit' loop with a new puzzle every 24 hours

Railbound

Railbound

Afterburn Lukasz Spierewka

A modern, award-winning take on line-drawing logic puzzles that uses a train-track theme to innovate on the genre.

-

Premium production with charming art and narrative elements

-

Innovative 'track-bending' logic that evolves the standard one-line mechanic

The outtake for ⊷ ONE LINE

SWOT Analysis

Core Strengths

  • High user rating (4.7) indicating strong core mechanic satisfaction
  • Unique IQ tracking differentiator provides qualitative feedback
  • Lightweight performance and battery-friendly optimization

Critical Frictions

  • Product is in maintenance mode (last updated June 2019)
  • Limited content library compared to competitors like 1LINE
  • Lack of modern retention mechanics like daily rewards

Growth Levers

  • Implement daily puzzle loops to drive retention (Knotwords model)
  • Introduce premium ad-free tiers or 'Pro' IQ analytics
  • Expand content library to match the 'thousands of levels' offered by rivals

Market Threats

  • Direct competition from Artory's 1LINE which has higher social proof and content volume
  • High-polish alternatives from major publishers like PlaySimple Games
  • Risk of platform removal due to lack of updates for 4+ years

What are the next best moves?

high

Refresh content library and update cadence

The app hasn't been updated since 2019, while competitor 1LINE offers 'thousands of levels' and frequent updates, making ONE LINE appear abandoned.

high

Implement a 'Daily IQ Challenge' habit loop

Competitors like Knotwords and Fill One Line use daily mechanics to drive retention; ONE LINE's IQ tracking is the perfect hook for a daily recurring user action.

medium

Modernize UI/UX to 'Premium Minimalist' standards

Newer competitors like Railbound and Orixo have raised the bar for aesthetic polish in the minimalist puzzle category.

Feature Gaps vs Competitors

  • Significantly larger content library (available in 1LINE)
  • Daily rewards and retention mechanics (available in Fill One Line)
  • Daily puzzle habit loop (available in Knotwords)
  • Narrative or 'cozy' aesthetic elements (available in Railbound)

Key Takeaways

⊷ ONE LINE has a strong foundation with its 4.7-star rating and unique IQ-tracking hook, but it is currently a 'zombie app' in a highly competitive space. To survive, the PM must transition from maintenance to active development, specifically by expanding content depth to match 1LINE and implementing daily habit loops seen in modern category leaders.

Where Is It Heading?

Declining

Last updated June 2019 — product is in maintenance mode with no recent feature expansion.

Competitors like 1LINE and Fill One Line have scaled significantly in content and polish since this app's last update.

Maintains a high 4.7 rating despite age — core mechanic remains highly resonant with users.

Independent intel to help builders create better apps.

No publisher influence. No third-party bias. Built with objectivity in mind to serve the builder community.

Hope this helps & keep building! · Found an error?

What's new in this report

No changes detected yet.

Cite this report

Marlvel.ai. “⊷ ONE LINE Intelligence Report.” Updated Apr 12, 2026. https://marlvel.ai/intel-report/games/one-line

Agent Markdown (.md)·

Data licensed under CC-BY-NC 4.0