Seung Jin Han

Known for

DayDiary - Diary, Note

1app4.3(16)

Active nemesis

DOSA Apps

Other rivals

Publisher DNA

AI intelligence is not yet available for Seung Jin Han. The portfolio data below is up to date.

Top niches they play in

Journaling Note Taking1 app

Explore the Journaling Note Taking niche

See every app competing in Seung Jin Han's strongest niche.

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Portfolio

Apps

1 app analysed

Sort by

DayDiary - Diary, Note

4.3(16)

View Intel →

Minimalist design avoids the visual clutter found in competitor interfaces

AI-driven emotional analysis provides deeper personal insight than static diary templates
Lack of biometric or PIN security features essential for private diary users

Distributed across 20 markets, strongest in Europe.

Based on 1 of 1 app with localized market data.

User sentiment

User-sentiment analysis coming soon.

Rivals

The rivals identified

Nemeses(1)

DOSA Apps

known forUnicorn Diary (lock - PIN)

1 app

So what?

Strategic outlook coming soon.

Frequently asked questions

How many apps does Seung Jin Han publish?

Seung Jin Han has 1 app tracked by Marlvel, primarily in the Lifestyle category.

What kind of apps does Seung Jin Han make?

Seung Jin Han's portfolio is concentrated in Lifestyle, with an average rating of 4.3/5 across rated apps.

Last updated

DayDiary - Diary, Note

v1.16.92

6mo ago

· last scanned Jul 2026

Americas (4)

Brazil1 / 1
Canada1 / 1
Mexico1 / 1
United States1 / 1

Europe (9)

France1 / 1
Germany1 / 1
Italy1 / 1
Netherlands1 / 1
Portugal1 / 1

›+4 more europe markets

Spain1 / 1
Sweden1 / 1
Turkey1 / 1
United Kingdom1 / 1

Asia-Pacific (7)

Australia1 / 1
India1 / 1
Indonesia1 / 1
Japan1 / 1
Singapore1 / 1

Core markets (1/1 apps)

AustraliaBrazilCanadaFranceGermanyIndiaIndonesiaItalyJapanMexicoNetherlandsPortugalSingaporeSouth KoreaSpainSwedenTurkeyUnited KingdomUnited StatesVietnam

This app dominates the diary category through massive scale and a highly gamified, visual-first approach that directly competes for the same casual journaling demographic.

Contenders(4)

NOTEGG

known forYOUKAMI

1 app4.8Lifestyle

View Intel →

YOUKAMI targets the same emotional-journaling niche, emphasizing artistic expression and hashtag-based organization for mood tracking.

Perigee

known forHalo: Daily Journaling App

1 app4.8Lifestyle

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VIMI LAB

known forDaily Diary: Friend For Life

1 app4.7Lifestyle

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婷婷乔

known forShine - Timeline diary

2 apps4.9Lifestyle

Same space(3)

Chanho Lee

known forDrawMyToday - AI Picture Diary

1 app4.3Lifestyle

View Intel →

Both apps leverage AI to enhance the diary experience, specifically focusing on the visual representation of daily emotions.

Dev2A

known forJuJo: Creative Journal & Diary

1 app4.6Lifestyle

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Jake Biele

known for4rabet

1 app3.2Lifestyle

View Intel →

Despite the category mismatch, this app competes for the same 'ritual organization' user base looking for simple, daily memory capture.

New entrants(2)

Amon Studio

known forLore: Every Chat Hides a Story

1 app0.0Lifestyle

View Intel →

This newcomer disrupts the diary space by automating entry creation through existing messaging habits.

Manicgrin Media

known forfelt

1 app0.0Lifestyle

View Intel →

What is Seung Jin Han's top app?

Based on user sentiment and following across the portfolio, DayDiary - Diary, Note stands out as Seung Jin Han's flagship app tracked by Marlvel.

In how many countries are Seung Jin Han's apps available?

Marlvel has tracked Seung Jin Han's apps across 20 countries.

›+2 more asia-pacific markets

South Korea1 / 1
Vietnam1 / 1

Halo is a direct competitor in the wellness-focused journaling space, utilizing guided reflections to drive user engagement.

Both apps focus on the intersection of multimedia journaling and lifestyle tracking, competing for users who want a digital companion for their daily memories.

Shine competes by offering advanced data management and visualization tools for users who prioritize long-term diary analytics over simple photo logging.

JuJo competes for the creative journaling audience, focusing on the aesthetic and habit-tracking aspects of daily logging.

Users report: felt enters the market with a focus on rapid, visual-first capture, challenging the target's photo-diary positioning.

Snapshot

Publisher DNA

Top niches they play in

Portfolio

Apps

User sentiment

Rivals

The rivals identified

Nemeses(1)

So what?

Frequently asked questions

Americas (4)

Europe (9)

Asia-Pacific (7)

Core markets (1/1 apps)

Contenders(4)

Same space(3)

New entrants(2)