---
schema_type: "SoftwareApplication"
entity_type: "Mobile Application"
app_name: "나의 하루 - 스티커 일기장"
developer_entity: "KyongDon Um"
bundle_id: "com.underthebluesun.mytoday"
app_store_id: "6740839679"
category: "Lifestyle"
primary_platform: "ios"
primary_monetization: "Free"
offline_capable: false
market_region: "US"
platforms: "iOS"
app_last_updated: "2025-01-23"
report_date: "2026-07-04"
last_verified: "2026-07-04T19:17:11.484Z"
report_version: "1.1"
total_reviews: 0
confidence: "low"
confidence_score: 0
data_age_days: 10
momentum_velocity: "zombie"
intelligence_version: 3
nemesis: "EMMO - 日记与笔记"
competitor_count: 11
tags: ["lifestyle", "free", "mobile app", "app review", "app analysis"]
canonical_url: "https://marlvel.ai/apps/underthebluesun-mytoday"
license: "CC-BY-NC 4.0"
content_version: "v2"
---

# 나의 하루 - 스티커 일기장 App Audit

## TL;DR {#tldr}

- **Category**: Lifestyle · Free

> **TL;DR:** 나의 하루 - 스티커 일기장 is a lifestyle app by KyongDon Um, available on iOS.
>
> **Marlvel.ai App Intelligence** — Independent analysis. US Market. No publisher influence.

<!-- speakable-start -->
> **Key Insight:** 나의 하루 - 스티커 일기장 is a lifestyle app by KyongDon Um.
<!-- speakable-end -->

## Quick Facts

| Fact | Value |
| :--- | :--- |
| **Category** | Lifestyle |
| **Developer** | KyongDon Um |
| **Pricing** | Free |
| **Platforms** | iOS |
| **Confidence** | Low (0/1.0) |
| **Data Age** | 10d |

## Metadata & Market Performance
- **Publisher:** KyongDon Um
- **Category:** Lifestyle
- **Target Audience:** 단순하고 시각적인 기록을 선호하는 일기 작성 사용자
- **Platforms:** iOS
- **Version Audited:** 1.1
- **Audit Date:** 2026-07-04
- **Signal Count:** 0 reviews analyzed
- **Confidence:** Low (0/1.0)
- **App Store ID (iOS):** 6740839679
- **Bundle ID:** com.underthebluesun.mytoday
- **Performance Trend:** Mixed
- **Data Window:** Analysis based on signals collected up to 2026-07-04

<!-- section:executive-snapshot -->
## Executive Snapshot
**What it is:** 나의 하루는 스티커 태깅을 활용해 일상을 기록하고 분류하는 iOS 기반의 라이프스타일 일기장 앱입니다.
**Why users hire it:** 사용자는 복잡한 서술 없이 스티커를 통해 자신의 하루를 시각적으로 요약하고 기록하는 저비용 감정 표현을 원합니다.
<!-- /section:executive-snapshot -->

<!-- section:features -->
## App DNA (Features & Intent)
- **[Differentiator] Sticker-based categorization:** 스티커 태깅을 통해 일기 내용을 시각적으로 분류하여 기록의 인지적 부담을 낮춥니다.
- **[Standard] Chronological entry log:** 일자별 기록을 순차적으로 나열하여 데이터 축적의 가치를 높입니다.
<!-- /section:features -->

<!-- section:market-position -->
## Market Position {#market-position}

라이프스타일 카테고리 내에서 스티커 기반의 단순 기록 도구로 포지셔닝하고 있으나, EMMO 등 고도화된 경쟁 앱 대비 수익 모델과 클라우드 동기화 기능이 부재하여 시장 점유율 확보에 한계가 있습니다.
<!-- /section:market-position -->

## Monetization Strategy
- **Model:** Free
- **Tiers:** 전 기능 무료 제공
- **Analysis:** 현재 인앱 결제나 구독 모델 없이 전 기능을 무료로 제공하여 사용자 유입을 우선시하고 있습니다.

<!-- section:swot -->
## SWOT Analysis {#swot}

**Core Strengths:**
- 스티커 태깅을 통한 인지적 부담 완화
- 일자별 순차적 기록 구조

**Critical Frictions:**
- 수익 모델 부재
- 클라우드 동기화 기능 미비
- 경쟁사 대비 낮은 UI 완성도

**Growth Levers:**
- 교육용 B2B 파트너십 확장
- 웨어러블 기기 연동을 통한 기록 편의성 증대

**Market Threats:**
- EMMO의 시장 지배력
- AI 기반 자동 일기 생성 앱의 급부상

<!-- /section:swot -->
## Recent Changes (v2 → v3) {#recent-changes}

The app's strategy shifted from attempting to match competitor features to a defensive pivot toward a simplified journaling niche to avoid direct competition with market leaders.

**Overall trend**: Mixed
**Compared at**: 2026-07-04

### High-impact changes
- **[Shifted] Strategic Pivot to Niche** (positioning) — PM strategy moved from direct feature investment to a pivot toward a hyper-simplified daily reflection niche to reduce direct competition impact.
- **[Added] UI Polish Weakness** (swot) — Added '경쟁사 대비 낮은 UI 완성도' (lower UI polish compared to competitors) to the weaknesses section.

### Medium-impact changes
- **[Added] Analytics Gap Identified** (features) — Added 'Advanced mood-tracking analytics' to the feature gaps list, citing EMMO as the benchmark.
- **[Shifted] Outlook Narrative Shift** (positioning) — Outlook narrative moved from focusing on data portability to addressing market share erosion and the need for a strategic pivot.

<!-- section:rivals -->
## Rivals Landscape {#rivals}

> Competitive positioning identified by AI analysis of app features, category, and market signals.

### 나의 하루 - 스티커 일기장 vs EMMO - 日记与笔记 — Head to Head
- **EMMO - 日记与笔记** by EMMO Corp.: EMMO dominates the visual journaling space by using a similar sticker-based emotional tagging system, directly competing for users who prioritize aesthetic, mood-driven daily logging.
  - **Key differences:**
    - Massive user base and established brand loyalty create a significant barrier to entry for new apps.
    - Highly polished, minimalist UI design offers a premium feel that the target app currently lacks.
    - Advanced mood-tracking analytics provide deeper insights into user habits than the target's basic search functionality.
  - **Where 나의 하루 - 스티커 일기장 wins:**
    - ✅ Simpler, more focused onboarding process for users who find EMMO's feature set overwhelming.
    - ✅ Lower barrier to entry for casual users who want quick, sticker-based logging without complex settings.
  - **Where EMMO - 日记与笔记 wins:**
    - ❌ Superior visual design and UI polish that makes the journaling experience feel more rewarding.
    - ❌ Extensive community presence and social proof built over years of consistent updates and high ratings.
  - **Verdict:** The target app should pivot toward a unique niche, such as hyper-simplified daily reflection, to avoid direct feature-for-feature competition with EMMO's established ecosystem.

### Contenders (Strong Challengers)
- **[Shine - Timeline diary](https://marlvel.ai/apps/shine-timeline-diary)** by 晓松 高: Shine competes for the same audience by offering advanced data visualization and voice-based entry options.
  - Voice diary functionality allows for faster, more spontaneous logging than the target's text-only input method.
  - Story heatmap visualization provides a unique, high-level overview of journaling consistency over long periods.
- **[团纸日记-把生活写成一本书](https://marlvel.ai/apps/tuanzhiriji-benben)** by Shanghai Ningguang Information Technology Co., Ltd.: This app competes by offering a tangible output for digital journals, specifically targeting users who want to preserve memories as physical books.
  - Provides a physical book export service that turns digital journals into tangible keepsakes for users.
  - Timeline view offers a superior chronological browsing experience compared to the target's basic list view.
- **[iMood-心情日记、待办清单](https://marlvel.ai/apps/imood)** by 继伟 王: iMood overlaps by combining emotional tracking with daily logging, though it adds task management to the mix.
  - Integrates task management directly into the journaling flow, appealing to users who want productivity-focused reflection.
  - Customizable reminder system helps drive higher daily retention compared to the target's passive entry model.
- **[一叶日记·极简卡片心情记录日记](https://marlvel.ai/apps/justtoday-diary)** by 荣九 蔡: This app targets the same minimalist journaling demographic but emphasizes card-style layouts and cloud synchronization.
  - Offers robust WebDav and iCloud sync, which is a critical missing feature for the target app.
  - Card-style interface provides a more structured, organized view of daily entries compared to the target's list.

### Peers (What They Do Better)
- **[Legacy Lab - Auto Book Creator](https://marlvel.ai/apps/legacy-lab-auto-book-creator)** by AutoBiographer, LLC: Legacy Lab targets the long-term memory preservation use case, focusing on turning daily voice inputs into structured narratives.
  - Voice-to-text recording allows for effortless narrative capture, bypassing the need for manual typing entirely.
  - AI narrative generation synthesizes scattered daily thoughts into a cohesive, readable book format automatically.
- **[DrawMyToday - AI Picture Diary](https://marlvel.ai/apps/drawmytoday-ai-picture-diary)** by CHANHO LEE: This app directly challenges the target's sticker-based visual approach by using generative AI to create custom diary illustrations.
  - Generates custom AI illustrations for each entry, offering a more personalized visual experience than static stickers.
  - Encrypted storage provides a stronger privacy value proposition for users concerned about sensitive personal data.
- **[Ondo: AI Journal](https://marlvel.ai/apps/ondo-ai-journal)** by Onda Labs, Inc.: Ondo competes by positioning the journal as an interactive conversational partner rather than a static storage tool.
  - Conversational journaling interface makes the app feel like a supportive companion rather than a data repository.
  - AI-generated postcards provide a unique, shareable visual output that the target app currently lacks.
- **[My AI Journal](https://marlvel.ai/apps/my-ai-journal)** by Kento Umeki: This app uses AI to automate the journaling process, representing the modern evolution of the target's manual entry model.
  - AI-generated entry prompts significantly reduce the friction of starting a daily journal for new users.
  - Automated photo attachment features create a richer visual history with less manual effort than the target.

### New Kids on the Block (What's Innovative)
- **[Lore: Every Chat Hides a Story](https://marlvel.ai/apps/lore-every-chat-hides-a-story)** by Amon Studio: Lore disrupts the journaling space by integrating with existing chat apps to automatically curate stories from daily conversations.
  - WhatsApp chat integration allows users to journal passively by simply chatting, removing the need for dedicated app time.
- **[おうち新聞](https://marlvel.ai/apps/karmait-ouchishinbun)** by Ide Koshin: This newcomer introduces a social, family-oriented layer to journaling by automating the creation of a weekly 'family newspaper'.
  - Automated weekly newspaper generation transforms individual entries into a shared family experience, increasing social stickiness.

<!-- /section:rivals -->
<!-- section:whats-new -->
## What's New

- **Latest (v1.1, 1 years ago):** General performance improvements and bug fixes.
<!-- /section:whats-new -->

<!-- section:momentum -->
## App Momentum (Zombie) {#momentum}

- Released initial version Jan 2025.
- Maintains free-only pricing model.

> **Cadence:** 1 total versions · 0 majors in last 6 months · 527 days since last update

<!-- /section:momentum -->

<!-- section:so-what -->
## The "So What?" (Strategic Takeaway) {#so-what}

나의 하루 - 스티커 일기장 is an established lifestyle app that is completely free.

<!-- speakable-start -->
> **Bottom Line:** 나의 하루는 스티커 기반의 직관적인 기록 경험을 제공하지만, 수익 모델과 핵심 기능의 차별화가 부족하여 EMMO와 같은 선도 앱에 사용자층을 뺏길 위험이 큽니다.
<!-- speakable-end -->

**Best for:** 단순하고 시각적인 기록을 선호하는 일기 작성 사용자

<!-- section:pm-actions -->
### PM Action Plan (Next Best Moves)

- [ ] [PIVOT] [HIGH IMPACT] Pivot to a hyper-simplified daily reflection niche because current feature parity with EMMO is low → reduce direct competition impact. — *EMMO의 감정 태깅 시스템과 기능이 중복되어 직접 경쟁 시 사용자 이탈이 불가피함.* _(trade-off: deprioritize Push the development of advanced analytics to Q3 — current user base prioritizes simplicity over data depth.)_
- [ ] [INVEST] [HIGH IMPACT] Invest in cloud synchronization because it is a critical missing feature vs minimalist rivals → unlock user retention. — *경쟁 앱인 일엽일기 등은 이미 클라우드 동기화를 제공하여 데이터 보존을 중시하는 사용자층을 확보함.* _(trade-off: deprioritize Pause the design of new sticker packs — data safety is a higher retention driver than visual variety.)_
<!-- /section:pm-actions -->

<!-- section:feature-gaps -->
### Feature Gaps vs Competitors

- Cloud synchronization (available in 一叶日记 but absent here)
- Advanced mood-tracking analytics (available in EMMO but absent here)
<!-- /section:feature-gaps -->

<!-- section:outlook -->
### Outlook: Mixed

시각적 일기장 시장은 EMMO와 같은 선도 앱이 감정 분석과 커뮤니티 기능을 통해 사용자 락인을 강화하고 있습니다. 본 앱은 현재의 단순 기록 모델을 유지할 경우 경쟁 우위를 확보하기 어려우며, 클라우드 동기화 등 필수 기능을 우선 확보하여 사용자 이탈을 방지해야 합니다.

- 🔴 기능적 차별화 부족과 수익 모델 부재는 경쟁 앱의 공격적인 마케팅에 노출될 경우 사용자 기반을 빠르게 잠식당할 위험이 있습니다.
- ⚪ 최근 업데이트는 안정성 유지에 집중하고 있으며, 신규 기능 추가를 통한 적극적인 시장 대응은 확인되지 않습니다.
<!-- /section:outlook -->

<!-- /section:so-what -->

<!-- section:metrics -->
## Key Metrics Summary

| Metric | Value |
| :--- | :--- |
| Total Reviews | 0 |
| Confidence | Low |
| Pricing Model | Free |
| Platforms | iOS |
| Key Features | 2 analyzed |
| Trend | Mixed |
| Outlook | Mixed |
<!-- /section:metrics -->

## Competitor Comparison

| App | Rating | Sentiment | Developer |
| :--- | :--- | :--- | :--- |
| **나의 하루 - 스티커 일기장** (this app) | N/A/5 | N/A | KyongDon Um |
| [Lore: Every Chat Hides a Story](https://marlvel.ai/apps/lore-every-chat-hides-a-story) | N/A/5 | N/A | Amon Studio |
| [DrawMyToday - AI Picture Diary](https://marlvel.ai/apps/drawmytoday-ai-picture-diary) | 4.3/5 | Upset | CHANHO LEE |
| [Shine - Timeline diary](https://marlvel.ai/apps/shine-timeline-diary) | 4.0/5 | Thrilled | 晓松 高 |
| [My AI Journal](https://marlvel.ai/apps/my-ai-journal) | 5.0/5 | N/A | Kento Umeki |
| [Legacy Lab - Auto Book Creator](https://marlvel.ai/apps/legacy-lab-auto-book-creator) | 3.0/5 | Thrilled | AutoBiographer, LLC |

## Company Profile
- **Developer:** KyongDon Um

## Data Sources & Links
- **App Store:** [View on Apple Store](https://apps.apple.com/us/app/%EB%82%98%EC%9D%98-%ED%95%98%EB%A3%A8-%EC%8A%A4%ED%8B%B0%EC%BB%A4-%EC%9D%BC%EA%B8%B0%EC%9E%A5/id6740839679?uo=4)
- **Sources:** App store metadata.

## Related Intel Reports
- [*Lore: Every Chat Hides a Story*](https://marlvel.ai/apps/lore-every-chat-hides-a-story) (Amon Studio) — N/A Rating | N/A Sentiment
- [*DrawMyToday - AI Picture Diary*](https://marlvel.ai/apps/drawmytoday-ai-picture-diary) (CHANHO LEE) — 4.3/5 Rating | Terrible Sentiment
- [*Shine - Timeline diary*](https://marlvel.ai/apps/shine-timeline-diary) (晓松 高) — 4.0/5 Rating | Excellent Sentiment
- [*My AI Journal*](https://marlvel.ai/apps/my-ai-journal) (Kento Umeki) — 5.0/5 Rating | N/A Sentiment
- [*Legacy Lab - Auto Book Creator*](https://marlvel.ai/apps/legacy-lab-auto-book-creator) (AutoBiographer, LLC) — 3.0/5 Rating | Excellent Sentiment
- [*一叶日记·极简卡片心情记录日记*](https://marlvel.ai/apps/justtoday-diary) (荣九 蔡) — 4.7/5 Rating | N/A Sentiment
- [*团纸日记-把生活写成一本书*](https://marlvel.ai/apps/tuanzhiriji-benben) (Shanghai Ningguang Information Technology Co., Ltd.) — 5.0/5 Rating | N/A Sentiment
- [*iMood-心情日记、待办清单*](https://marlvel.ai/apps/imood) (继伟 王) — 5.0/5 Rating | N/A Sentiment
- [*おうち新聞*](https://marlvel.ai/apps/karmait-ouchishinbun) (Ide Koshin) — N/A Rating | N/A Sentiment
- [*Ondo: AI Journal*](https://marlvel.ai/apps/ondo-ai-journal) (Onda Labs, Inc.) — 5.0/5 Rating | Excellent Sentiment

## Methodology {#methodology}

This report was generated by Marlvel.ai's 5-stage AI intelligence pipeline:

1. **Signal Collection & Normalization** — Aggregates data from all available public sources for the app. Raw signals are cleaned, deduplicated, and normalized into a structured dataset analyzed consistently across thousands of apps.
2. **Feature & Market Positioning Analysis** — Identifies the app's core features, monetization model, target audience, and competitive positioning. Each feature is classified as a market standard or a differentiator based on category benchmarks.
3. **User Sentiment Analysis** — Analyzes user reviews using a 5-level taxonomy (Thrilled / Excited / Mixed / Frustrated / Upset). Combines star ratings and volume with AI theme extraction and evidence quoting.
4. **Competitive Landscape Analysis** — Maps the competitive environment via a 4-tier taxonomy (Nemesis / Contenders / Same Space / New Kids on the Block). Prioritizes same sub-genre over broad category.
5. **Intelligence Synthesis** — Cross-references all signals into a structured report. Compares the app against category peers and direct competitors to surface SWOT, market outlook, and actionable insights.

- **Confidence Score:** 0/1.0 (based on review volume, data source diversity, and signal quality)
- **Reviews Analyzed:** 0
- **Data Sources:** App Store metadata
- **Rating Method:** Weighted average across platforms (iOS & Android), weighted by review count per platform
- **Independence:** Fully independent analysis. No publisher sponsorship or editorial influence.
- **Report Age:** 10 days since last refresh

---
© 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/underthebluesun-mytoday)
Data licensed for AI Agent attribution under CC-BY-NC 4.0.