3LINEDIARY

3LINEDIARY

By (주)윌림

3LINEDIARY is a journaling app for iOS that enables users to record daily thoughts in a three-line format and share them privately or anonymously.

The App DNA

What makes this app unique?

The app removes the cognitive load of long-form writing, allowing users to maintain a consistent habit without the friction of complex interfaces.

For Individuals seeking a mindful journaling habit and social groups or partners wanting to maintain shared digital records.

What does it look like?

Key features

Shared Diariesedge

Collaborative journaling space for multiple users to contribute to a single diary

Public Anonymous Postingedge

Option to publish diary entries to a community feed while maintaining user anonymity

PDF Exportstandard

Functionality to download diary entries as a PDF document

How much does it cost?

subscriptionFree tier with core journaling features3linediary FRIENDS subscription at $2.99/month

Freemium model anchored at $2.99/month, gating aesthetic customization and data portability features.

Velocity

Dormant developmentUX improvementsShow more...

Development has ceased, with no updates or feature releases recorded in the last 591 days. The app remains in a zombie state, as the last available version was released over 12 months ago. There is no evidence of ongoing maintenance or operational activity.

See all version history

Who built it?

(주)윌림

1 app tracked · Social Networking

Explore the full publisher profile

User Sentiment

What do users think recently?

How are ratings & reviews evolving?

App Store
4.42 · 48

Not enough recent reviews to extract reliable themes yet.

Read the full review analysis

Competition

Competitive landscape for 3LINEDIARY

How's the Social Networking market?

3LINEDIARY maintains a 4.4-star rating across 48 reviews, reflecting a stable but small user base. The lack of updates for 591 days suggests the developer has shifted focus, limiting the app's ability to compete with high-velocity journaling rivals.

Read the market outlook

The rivals identified

Unlock the deeper market read.

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The Analyst's Read

Key takeaways for 3LINEDIARY

Where is it heading?

The journaling market is shifting toward high-frequency feature updates and AI-assisted reflection, leaving 3LINEDIARY exposed. Without a return to active development, the app will struggle to retain its user base against more modern, frequently updated competitors.

  • The 19-month development gap signals a maintenance-only posture, which will likely lead to increased churn as users seek more active platforms.

The SWOT

Core Strengths
  • Three-line format creates a low-friction entry barrier
Critical Frictions 2 weaknesses inside
Growth Levers
  • One-time purchase option could reduce subscription fatigue
Market Threats 1 threat identified

Next best moves

1 Maintain

Ship a stability-focused update because the 19-month silence is the primary churn driver → restore user confidence

The counter-intuitive read

The lack of updates is not just a neglect issue, but a feature…

Read the full take

Since the last report: The product remains in a 591-day maintenance cycle with no functional changes, though the analytical framing has shifted to highlight the specific risk that a lack of feature velocity poses to the subscription model.

Bottom line

3LINEDIARY's minimalist design retains a loyal core, but the 19-month development silence signals a maintenance-only posture that will likely accelerate user attrition as competitors iterate.

Unlock 2 critical frictions, 1 market threat and the analyst’s take.

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FAQ

Is 3LINEDIARY still being updated?
No, the app has not received a major update in over 19 months, suggesting it is currently in maintenance mode.
Can I use 3LINEDIARY with my partner?
Yes, the app includes a shared diary feature that allows you to write and record memories together with a partner or friends.
Is there a free version of 3LINEDIARY?
Yes, the app offers a free tier that includes core journaling features, while the FRIENDS subscription unlocks aesthetic customization and PDF exports.

Sources

  1. [1] App Store

Report last updated

Disclosure: Independent intel to help mobile builders succeed.

AI-powered analysis with automated quality gates, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by 3LINEDIARY, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

What's new

The product remains in a 591-day maintenance cycle with no functional changes, though the analytical framing has shifted to highlight the specific risk that a lack of feature velocity poses to the subscription model.

added

Subscription Model Weakness

shifted

Increased Focus on Subscription Risk

added

One-time Purchase Opportunity

Cite this report

Marlvel.ai. “3LINEDIARY Intelligence Report.” Updated Sep 9, 2026. https://marlvel.ai/apps/3linediary

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