3LINEDIARY vs 슬쩍
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
슬쩍
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Peek is a widget app that lets you send live photos directly to your close friends' home screens. Every time you unlock your phone, you'll see a new photo from your friends. Catch a glimpse of what your favorite people are up to throughout the day. How it works Add the Peek widget to your home screen. When a friend sends a photo, it instantly appears on your widget. Tap the widget to send a photo from your camera or album, and it will show up right on your friends' home screens. Just for your closest friends • Only share photos with people who joined via your invite link or QR code. No one else can search for your profile. • Don't worry about follower counts. Invite your best friends and family, and just focus on the moment. • Be your authentic self and share photos only with the people who matter most. React to friends' photos • React to widget photos by sending a chat message. • Your friend will receive a notification, and you can see all your exchanged photos in your feed. • It's not about competing for likes—it's about genuine sharing among close friends. You can always cut ties with unwanted contacts by blocking them at any time. Download Peek for free today. Send photos to your friends, family, and besties, and close the distance right from your home screen. [App Permissions Guide] Peek only requests the minimum device permissions needed to share widget photos and invite friends. [Required] None [Optional] Camera: To take photos to share on the widget and scan QR codes for friend invites. Photos/Storage: To select widget and profile photos from your album. Notifications: To receive alerts for new widget photos and chat messages. You can still use the app even if you do not agree to the optional permissions. How to revoke access: Device Settings > Apps > Peek > Permissions > Allow or Deny access.
Screenshots
Verdict
The clearest difference is in-app purchases: 슬쩍 at none against 3LINEDIARY's 1. 슬쩍 also leads on ads (none vs shown) and update cadence (every 2 days vs fortnightly). On price, device support and iOS requirement 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
Both are free to download. 3LINEDIARY sells 1 in-app purchase, starting at $2.99 per month. 슬쩍 asks for nothing beyond the download.
3LINEDIARY ships an update fortnightly, 슬쩍 every 2 days. The most recent releases landed on October 24, 2026 and October 13, 2026 respectively.
| Parameter | 3LINEDIARY | 슬쩍 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (47 ratings) — better | — |
| Positive reviews | 84.5% of reviews | — |
| Number of ratings | 47 — better | — |
| Update frequency | Fortnightly | Every 2 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 16.4 |
| Further details — not scored | ||
| Size | 88 MB | 84 MB |
| Age rating | 12+ | 4+ |
| Developer | (주)윌림 | wonyung choi |
In-app purchases
3LINEDIARY
- ‘Friends' Subscription$2.991 Month
슬쩍
No in-app purchases









