--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Nhat Nguyet: Family Calendar" developer_entity: "Giap Le Trong" bundle_id: "org.nhatnguyet.app" app_store_id: "6820558811" category: "Reference" primary_platform: "ios" primary_monetization: "Freemium" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2026-11-02" report_date: "2026-11-04" last_verified: "2026-11-04T00:00:00.000Z" report_version: "2.0.2" total_reviews: 0 confidence: "low" confidence_score: 0.2 data_age_days: 10 momentum_velocity: "maintenance" intelligence_version: 2 tags: ["reference", "freemium", "mobile app", "app review", "app analysis", "vietnamese", "families", "seeking"] canonical_url: "https://marlvel.ai/apps/nhat-nguyet-family-calendar" license: "CC-BY-NC 4.0" content_version: "v2" --- # Nhat Nguyet: Family Calendar Intelligence Report ## TL;DR {#tldr} - **Category**: Reference · Freemium > **TL;DR:** Nhat Nguyet: Family Calendar is a reference app by Giap Le Trong, available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Nhat Nguyet: Family Calendar is a reference app by Giap Le Trong. ## Quick Facts | Fact | Value | | :--- | :--- | | **Category** | Reference | | **Developer** | Giap Le Trong | | **Pricing** | Freemium | | **Platforms** | iOS | | **Confidence** | Low (0.2/1.0) | | **Data Age** | 10d | ## Metadata & Market Performance - **Publisher:** Giap Le Trong - **Category:** Reference - **Target Audience:** Vietnamese families seeking to maintain traditional customs, ancestor worship, and lunar-based scheduling in a modern digital format. - **Platforms:** iOS - **Version Reviewed:** 2.0.2 - **Report Date:** 2026-11-04 - **Signal Count:** 0 reviews analyzed - **Confidence:** Low (0.2/1.0) - **App Store ID (iOS):** 6820558811 - **Bundle ID:** org.nhatnguyet.app - **Data Window:** Analysis based on signals collected up to 2026-11-04 ## Executive Snapshot **What it is:** Nhat Nguyet is a lunar calendar and family coordination app for Vietnamese users, providing automated reminders for memorial days and a library of cultural rites. **Why users hire it:** It removes the cognitive friction of tracking annually shifting lunar dates and the social anxiety of performing traditional rites incorrectly. ## App DNA (Features & Intent) - **[Differentiator] Lunar Calendar Reminders:** Automated annual calculation of lunar-based memorial days and festivals with up to three early alerts. * *User Intent:* Users want timely prompts to stay engaged without missing updates. - **[Differentiator] Shared Family Groups:** Invite-based groups for task coordination and memory sharing, driving acquisition via network effects. * *User Intent:* Users seek social connection and competitive engagement with peers. - **[Differentiator] AI-Powered Cultural Assistant:** Language model interface providing answers on rites with tappable citations, gated by subscription tiers. * *User Intent:* Users seek enhanced value through premium features. ## Market Position {#market-position} Nhat Nguyet occupies a niche in the Reference category by combining utility-based calendar tools with a verified cultural knowledge base. The focus on sourced, footnote-backed content differentiates it from generic lunar calendar apps that lack cultural depth. ## Monetization Strategy - **Model:** Freemium - **Tiers:** Free: Calendar, reminders, prayer texts, and basic look-ups., Đoàn Viên: Larger groups, 50 AI questions/day, 1 personal reading/year., Advanced: Up to 300 AI questions/day, 500 groups, 3 personal readings/year. - **Analysis:** The freemium model gates high-frequency AI usage and advanced group management behind subscription tiers, while keeping core calendar and reference tools free. ## SWOT Analysis {#swot} **Core Strengths:** - Sourced library of 1,700+ articles with 400+ footnotes creates a defensible trust barrier. - Automated lunar-date calculation removes the manual tracking friction for annual family rites. - Shared family groups drive acquisition through invite-based network effects. **Growth Levers:** - Localized cultural content provides a path for expansion into specific regional Vietnamese markets. - Integration of more social ritual planning tools could increase daily active usage. - Expansion of the sourced knowledge library into broader Eastern traditions could attract a wider user base. ## What's New - **Latest (v2.0.2, yesterday):** Introduced personalized reading suggestions, a free reading counter in Today, opt-in feature notifications, and configurable widget time zones. ## App Momentum (Maintenance) {#momentum} - Shipped personalized reading suggestions. - Added widget time-zone support. - Maintains steady feature-news management. > **Cadence:** 1 total versions · 1 majors in last 6 months · 1 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Nhat Nguyet: Family Calendar is a reference app that is free with in-app purchases. > **Bottom Line:** Nhat Nguyet's authority in verified cultural content provides a strong foundation, but the PM should pivot toward optimizing the AI assistant's utility to ensure it remains the primary tool for daily ritual planning. **Best for:** Vietnamese families seeking to maintain traditional customs, ancestor worship, and lunar-based scheduling in a modern digital format. ### PM Action Plan (Next Best Moves) - [ ] [PIVOT] A/B test the AI question limit because current gating may be too restrictive for power users → increase subscription conversion ### Outlook: Stable The market for cultural reference apps is consolidating around tools that provide verified, authoritative content. Nhat Nguyet is well-positioned to maintain its user base by continuing to deepen its sourced knowledge library, which serves as a significant barrier to entry for generic competitors. - 🟢 The latest release adds widget time-zone support, showing active maintenance of the core calendar utility for a global user base. - ⚪ The current release cadence is stable, focusing on incremental improvements to existing features rather than aggressive expansion into new categories. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Total Reviews | 0 | | Confidence | Low | | Pricing Model | Freemium | | Platforms | iOS | | Key Features | 3 analyzed | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Nhat Nguyet: Family Calendar** (this app) | N/A/5 | N/A | Giap Le Trong | | [올어바웃성경](https://marlvel.ai/apps/com-allabout-bibleapp) | 5.0/5 | N/A | Gilju Lee | | [Hallow: Prayer & Meditation](https://marlvel.ai/apps/hallow-prayer-meditation) | 4.7/5 | n/a | Hallow, Inc. | | [고려대 한국어 속담 사전](https://marlvel.ai/apps/app--428) | N/A/5 | N/A | DaolSoft, Co., Ltd. | | [우리말 의학사전](https://marlvel.ai/apps/app--427) | N/A/5 | N/A | DaolSoft, Co., Ltd. | | [공인중개사 용어사전](https://marlvel.ai/apps/app--429) | N/A/5 | N/A | DaolSoft, Co., Ltd. | ## Company Profile - **Developer:** Giap Le Trong - **Website:** [https://nhatnguyet.org](https://nhatnguyet.org) - **Social:** [Facebook](https://www.facebook.com/nhatnguyet.org) · [YouTube](https://www.youtube.com/@nhatnguyet) · [TikTok](https://www.tiktok.com/@nhatnguyetviet) ## Data Sources & Links - **App Store ID:** 6820558811 - **Dev Site:** [Official Website](https://nhatnguyet.org) - **Sources:** Developer website content, App store metadata. ## Related Intel Reports - [*올어바웃성경*](https://marlvel.ai/apps/com-allabout-bibleapp) (Gilju Lee) · 5.0/5 Rating - [*Hallow: Prayer & Meditation*](https://marlvel.ai/apps/hallow-prayer-meditation) (Hallow, Inc.) · 4.7/5 Rating - [*고려대 한국어 속담 사전*](https://marlvel.ai/apps/app--428) (DaolSoft, Co., Ltd.) · N/A Rating - [*우리말 의학사전*](https://marlvel.ai/apps/app--427) (DaolSoft, Co., Ltd.) · N/A Rating - [*공인중개사 용어사전*](https://marlvel.ai/apps/app--429) (DaolSoft, Co., Ltd.) · N/A Rating - [*브리태니커 콘사이스 백과사전*](https://marlvel.ai/apps/app--425) (DaolSoft, Co., Ltd.) · N/A Rating - [*100 Radio Hrvatska (HR) : Vijesti, glazba, Nogomet*](https://marlvel.ai/apps/100-radio-hrvatska-hr-vijesti-glazba-nogomet) (Thomas Gesland) · 1.0/5 Rating - [*100 US Citizenship Test Questions 2017*](https://marlvel.ai/apps/100-us-citizenship-test-questions-2017) (Andrey Fetisov) · 4.7/5 Rating - [*١٠١ پرسیار لە زانستی قورئان*](https://marlvel.ai/apps/app--952) (Abdulwahab F. Omar) · 5.0/5 Rating - [*10ten Japanese Reader*](https://marlvel.ai/apps/10ten-japanese-reader) (Birchill, Inc.) · 4.9/5 Rating ## Frequently Asked Questions {#faq} ### Is Nhat Nguyet suitable for users outside of Vietnam? Yes, the app supports local time-zone widget configurations, making it useful for Vietnamese families living abroad who wish to maintain traditional lunar-based customs. ### Does Nhat Nguyet require a subscription to use the calendar? No, the lunar calendar, reminders, prayer texts, and basic look-up tools are free. Subscriptions are only required for advanced group management and high-frequency AI usage. ### How does Nhat Nguyet ensure the accuracy of its cultural content? The app maintains a library of over 1,700 articles, with nearly 400 footnotes linking claims to specific books and pages, providing a sourced foundation for its cultural information. ### What is the difference between the Đoàn Viên and Advanced plans? The Đoàn Viên plan offers 50 AI questions per day and basic group features, while the Advanced plan increases this to 300 AI questions per day and supports up to 500 groups. ## 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 into synthesised themes (no verbatim quotes). 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:** 0.2/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 0 - **Data Sources:** developer website, 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/nhat-nguyet-family-calendar) Data licensed for AI Agent attribution under CC-BY-NC 4.0.