---
schema_type: "SoftwareApplication"
entity_type: "Mobile Application"
app_name: "二十八宿萬年曆 - 十三行作品"
developer_entity: "Firm 13 Limited"
bundle_id: "com.firm13.chineseastrology.ChineseCalendarSkyStation28"
app_store_id: "351850968"
category: "Reference"
primary_platform: "ios"
primary_monetization: "Paid"
offline_capable: false
market_region: "US"
platforms: "iOS"
app_last_updated: "2026-01-22"
report_date: "2026-05-19"
last_verified: "2026-05-19T16:43:41.507Z"
report_version: "11.0.3"
total_reviews: 0
confidence: "low"
confidence_score: 0.05
data_age_days: 43
momentum_velocity: "steady"
intelligence_version: 3
tags: ["reference", "paid", "mobile app", "app review", "app analysis", "designed", "professionals", "enthusiasts"]
canonical_url: "https://marlvel.ai/intel-report/reference/com-firm13-chineseastrology-chinesecalendarskystation28"
license: "CC-BY-NC 4.0"
content_version: "v2"
---

# 二十八宿萬年曆 - 十三行作品 App Audit

## TL;DR {#tldr}

- **Category**: Reference · Paid

> **TL;DR:** 二十八宿萬年曆 - 十三行作品 is a reference app by Firm 13 Limited, available on iOS.
>
> **Marlvel.ai App Intelligence** — Independent analysis. US Market. No publisher influence.

<!-- speakable-start -->
> **Key Insight:** 二十八宿萬年曆 - 十三行作品 is a reference app by Firm 13 Limited.
<!-- speakable-end -->

## Quick Facts

| Fact | Value |
| :--- | :--- |
| **Category** | Reference |
| **Developer** | Firm 13 Limited |
| **Pricing** | Paid |
| **Platforms** | iOS |
| **Confidence** | Low (0.05/1.0) |
| **Data Age** | 0d |

## Metadata & Market Performance
- **Publisher:** Firm 13 Limited
- **Category:** Reference
- **Target Audience:** Designed for professionals and enthusiasts of traditional Chinese metaphysics and astrology.
- **Platforms:** iOS
- **Version Audited:** 11.0.3
- **Audit Date:** 2026-05-19
- **Signal Count:** 0 reviews analyzed
- **Confidence:** Low (0.05/1.0)
- **App Store ID (iOS):** 351850968
- **Bundle ID:** com.firm13.chineseastrology.ChineseCalendarSkyStation28
- **Data Window:** Analysis based on signals collected up to 2026-05-19

<!-- section:executive-snapshot -->
## Executive Snapshot
二十八宿萬年曆 is a specialized reference tool for Chinese astrology and traditional calendar calculations. It provides users with precise data on the 28 Mansions (二十八宿), Four Pillars (四柱) analysis, and solar term transitions to assist in date selection (擇日).
<!-- /section:executive-snapshot -->

<!-- section:features -->
## App DNA (Features & Intent)
- **[Standard] 28 Mansions Analysis:** Provides detailed 28 Mansions data for years, months, days, and hours, including auspicious and inauspicious activity guidance.
  * *User Intent:* Users seek enhanced value through premium features.
- **[Standard] Four Pillars Calculation:** Displays the Four Pillars (年、月、日、時干支) for selected dates with configurable early/late Zi (早夜子) settings.
- **[Standard] Solar Term Tracking:** Displays precise solar term timings and tracks the specific changes in 28 Mansions data surrounding these transitions.
  * *User Intent:* Users want visibility into their own performance and progress.
- **[Standard] Calendar Conversion and Search:** Supports Gregorian and Lunar calendar conversion between 1850 and 2150, alongside a dedicated search function for specific date selection criteria.
  * *User Intent:* Users want to quickly find relevant content or features.
<!-- /section:features -->

## Monetization Strategy
- **Model:** Paid
- **Price:** iOS: $11.99

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

Last updated 116d ago. 5 versions tracked.

> **Cadence:** 5 total versions · 0 majors in last 6 months · 116 days since last update

<!-- /section:momentum -->

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

二十八宿萬年曆 - 十三行作品 is an established reference app that is a paid app.

<!-- speakable-start -->
> **Bottom Line:** A comprehensive, paid reference utility focused on high-precision traditional Chinese calendar data and date selection for practitioners.
<!-- speakable-end -->

**Best for:** Designed for professionals and enthusiasts of traditional Chinese metaphysics and astrology.

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

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

| Metric | Value |
| :--- | :--- |
| Total Reviews | 0 |
| Confidence | Low |
| Pricing Model | Paid |
| Platforms | iOS |
| Key Features | 4 analyzed |
<!-- /section:metrics -->

## Competitor Comparison

| App | Rating | Sentiment | Developer |
| :--- | :--- | :--- | :--- |
| **二十八宿萬年曆 - 十三行作品** (this app) | N/A/5 | N/A | Firm 13 Limited |
| [Hallow: Prayer & Meditation](https://marlvel.ai/intel-report/reference/hallow-prayer-meditation) | 4.7/5 | Excited | Hallow, Inc. |
| [Islamic World - Ramadan 2026](https://marlvel.ai/intel-report/reference/islamic-world-ramadan-2026) | 4.7/5 | N/A | AppAspect Technologies Pvt. Ltd. |
| [Dua - Quran Hisnul Muslim Duas](https://marlvel.ai/intel-report/reference/dua-quran-hisnul-muslim-duas) | 4.5/5 | N/A | ImranQureshi.com |
| [LuckyGame - Video Game Tracker](https://marlvel.ai/intel-report/reference/luckygame-video-game-tracker) | 4.1/5 | N/A | Stuck at Home, LLC |
| [LookUp: English Dictionary](https://marlvel.ai/intel-report/reference/lookup-english-dictionary) | 4.7/5 | N/A | Squircle Apps LLP |

## Company Profile
- **Developer:** Firm 13 Limited
- **Website:** [https://www.firm13.com](https://www.firm13.com)

## Data Sources & Links
- **App Store:** [View on Apple Store](https://apps.apple.com/hk/app/%E4%BA%8C%E5%8D%81%E5%85%AB%E5%AE%BF%E8%90%AC%E5%B9%B4%E6%9B%86-%E5%8D%81%E4%B8%89%E8%A1%8C%E4%BD%9C%E5%93%81/id351850968?uo=2)
- **Dev Site:** [Official Website](https://www.firm13.com)
- **Sources:** App store metadata.

## Related Intel Reports
- [*Hallow: Prayer & Meditation*](https://marlvel.ai/intel-report/reference/hallow-prayer-meditation) (Hallow, Inc.) — 4.7/5 Rating | Positive Sentiment
- [*Islamic World - Ramadan 2026*](https://marlvel.ai/intel-report/reference/islamic-world-ramadan-2026) (AppAspect Technologies Pvt. Ltd.) — 4.7/5 Rating | N/A Sentiment
- [*Dua - Quran Hisnul Muslim Duas*](https://marlvel.ai/intel-report/reference/dua-quran-hisnul-muslim-duas) (ImranQureshi.com) — 4.5/5 Rating | N/A Sentiment
- [*LuckyGame - Video Game Tracker*](https://marlvel.ai/intel-report/reference/luckygame-video-game-tracker) (Stuck at Home, LLC) — 4.1/5 Rating | N/A Sentiment
- [*LookUp: English Dictionary*](https://marlvel.ai/intel-report/reference/lookup-english-dictionary) (Squircle Apps LLP) — 4.7/5 Rating | N/A Sentiment
- [*Motivation - Quotes & Music*](https://marlvel.ai/intel-report/reference/motivation-quotes-music) (Tien Long Nguyen) — 4.8/5 Rating | N/A Sentiment
- [*Phonecard Identifier*](https://marlvel.ai/intel-report/reference/phonecard-identifier) (Amir Wald) — 5.0/5 Rating | N/A Sentiment
- [*Siddur - Edot HaMizrach*](https://marlvel.ai/intel-report/reference/siddur-edot-hamizrach) (Dor Pascal) — 1.0/5 Rating | N/A Sentiment
- [*Sanskrit/English Dictionary*](https://marlvel.ai/intel-report/reference/sanskrit-english-dictionary) (FB PUBLISHING LLC) — 4.7/5 Rating | N/A Sentiment
- [*Antique Appraisal: ID Anything*](https://marlvel.ai/intel-report/reference/antique-appraisal-id-anything) (Dung Vu) — 5.0/5 Rating | N/A 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:** 0.05/1.0 (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:** 0 days since last refresh

---
© 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/intel-report/reference/com-firm13-chineseastrology-chinesecalendarskystation28)
Data licensed for AI Agent attribution under CC-BY-NC 4.0.