Comparison

MapplerK2 vs 3LINEDIARY

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

MapplerK2

This app allows users to create and manage custom maps for data collection. It enables community members to map amenities and concerns, and organizations to visualize and share data with colleagues and clients.

Highlights
  • Customizable smart phone-based mapping
  • Community participatory mapping
  • Map amenities and concerns
  • Upload real-time data from smartphone
  • Add text, files, photos, videos, audio to map points
  • Customize data display
  • Share interactive maps
Features
Read full description

Data Collection Solutions Mappler Mobile is a customizable smart phone-based community participatory mapping application that enables community members to map amenities and concerns. Mappler Mobile can be used by organizations or individuals who have an existing Mappler (community mapping site) account with an assigned user ID and password. VERTICES provides web site development and management services that provide access to all data mapped using Mappler Mobile, Mappler, as well as layers imported from other sources. Visualize and Customize With Mappler Mobile you can: - Develop and manage an interactive map and mobile data-collection app for your business or organization. - Display pre- existing data on an interactive map and upload real-time data directly from your Smartphone - Add text, file attachments, photos, videos, audio and more to your map points - Customize the way that your data is displayed and share your interactive map with colleagues and clients via the internet

About

3LINEDIARY

This app offers a simple journaling experience focused on positivity and mindfulness. Capture daily thoughts with brief entries and optional photos, create multiple private or public diaries, and connect with a supportive community through shared writing and engagement.

Highlights
  • Three-line daily entries
  • Optional photo attachments
  • Multiple private diaries
  • Public diary sharing (anonymous option)
  • Community engagement (likes, comments)
  • Shared diaries with friends/family
  • Customizable reminders
Features
Read full description

A comforting and mindful space. Increase positivity and motivation in your day-to-day life through a simple journaling habit. 3linediary is a leading diary, journal app that enables you to capture your day with three lines of text and one picture. You can create multiple diaries to reflect various aspects of your life. You can make your diary private for your eyes only, or public to share your story anonymously. Read, connect, and engage with people’s touching stories and their various lives reflected in their public diaries. Journal with the people you love - your partner, friends, and family. Join a community organized around shared interests and write collectively — sharing various topics from what’s on your mind to relationship advices, hobbies, KPOP stans, book recommendations, etc. At 3linediary, we believe that writing and sharing your stories is an empowering act of self-love. To take a moment of your day to write something that captures your day may seem like a simple act - but it’s an act of leaving a record of you and cherishing the present-you for the future. Start writing today! ■ This app is recommended for people who … - want to keep a simple record of daily thoughts and feelings - want to feel more gratitude in life - want to relieve stress and anxiety - want to track various goals and habits - want a record of personal milestones - want to write a journal with friends - want to write a diary with their significant other - want to practice creative writing - want to find a community to write with 
 ■ Features: - Pin lock to keep your private diaries protected - Save each diary entry as an image - Set custom reminder notifications on specific days and times. - Write an entry for a past date. - Write more than 3 lines if you feel like writing more. ■ Community - You can make your diary public and still remain anonymous. - Engage and connect with others through comments, likes, and bookmarks. - Read about various lives through people’s public diaries. - Join a community and write together about a shared interest. ■ Shared Diaries - You can write diaries with your friends, family or partner. - Record special memories together. Write to your long-distance friend or partner. ■ 3linediary FRIENDS Subscription (USD $2.99/month) - Download your diaries as a PDF - Choose from thousands of images to go with your diary entry. - Decorate your diary with various stickers. - Capture how you feel with a range of different fonts. - Once you confirm the purchase, the payment will go through your iTunes account. - The price of the subscription includes taxes. - You can turn off auto-renewal at least 24 hours before your subscription period ends. - After your purchase, you can manage your subscriptions in your iTunes account settings and turn off auto-renewal. *Terms and Conditions for Paid Services: https://mywillim.wixsite.com/home/enutilization-paid *Privacy Policy: https://mywillim.wixsite.com/home/enpersonaldata willim Inc. is a startup that aspires to help build a world filled with sincerity. Capture your life in 3 lines. Share your stories with 3linediary. - Business name: willim Inc. - CEO: Bae Joonho - Company Registration Number: 341-81-00628

Screenshots

MapplerK24 screens
3LINEDIARY4 screens

Verdict

The call

The clearest difference is review sentiment: 3LINEDIARY at 85% against MapplerK2's 20%. 3LINEDIARY also leads on rating (4.5 vs 3.5) and update cadence (fortnightly vs every 2 months). MapplerK2's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. 3LINEDIARY sells 1 in-app purchase, starting at $2.99 per month. MapplerK2 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

3LINEDIARY holds the better App Store score, 4.5 against 3.5. That said, the two scores are not equally well evidenced: 3LINEDIARY has 47 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 20% of MapplerK2's written reviews are positive against 85% of 3LINEDIARY's.

UpkeepUpdate frequency

MapplerK2 ships an update every 2 months, 3LINEDIARY fortnightly. The most recent releases landed on November 11, 2026 and November 13, 2026 respectively.

Scorecard8 real differences · 2 level
MapplerK2 versus 3LINEDIARY: the parameters behind the verdict, then further details
ParameterMapplerK23LINEDIARY
PriceFreeFree
Rating3.5 (4 ratings)4.5 (47 ratings) — better
Positive reviews20.0% of reviews84.5% of reviews — better
Number of ratings447 — better
Update frequencyEvery 2 monthsFortnightly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS11.0 — better15.6
Further details — not scored
Size66 MB88 MB
Age rating4+12+
DeveloperWansoo Im(주)윌림

Customer experience

MapplerK2

All ratings4 ratings
Positive50.0%
Neutral25.0%
Negative25.0%
Written reviews5 reviews
Positive20.0%
Neutral20.0%
Negative60.0%

3LINEDIARY

All ratings48 ratings
Positive85.4%
Neutral6.3%
Negative8.3%
Written reviews84 reviews
Positive84.5%
Neutral6.0%
Negative9.5%

In-app purchases

None

MapplerK2

No in-app purchases

1 purchases

3LINEDIARY

Subscriptions1
  • ‘Friends' Subscription$2.991 Month

Questions

Is MapplerK2 free?
MapplerK2 is free to download, with no in-app purchases.
Is 3LINEDIARY free?
3LINEDIARY is free to download, with in-app purchases available.
Which has better reviews, MapplerK2 or 3LINEDIARY?
3LINEDIARY is rated higher. MapplerK2 averages 3.5 out of 5 from 4 ratings, while 3LINEDIARY averages 4.5 from 47 ratings.
Do MapplerK2 or 3LINEDIARY have ads?
3LINEDIARY shows ads; MapplerK2 does not.
Which is updated more often, MapplerK2 or 3LINEDIARY?
MapplerK2 ships an update every 2 months, and 3LINEDIARY fortnightly. Most recently, MapplerK2 was updated on November 11, 2026 and 3LINEDIARY on November 13, 2026.

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