# 十三行紫微斗數 for iPhone vs 八字合化

The clearest difference is price: 八字合化 at Free against 十三行紫微斗數 for iPhone's $39.99. 八字合化 also leads on device support (3 vs 1). 十三行紫微斗數 for iPhone's advantage is in-app purchases (none vs 1) and review sentiment (20% vs 0%). On update cadence, ads and iOS requirement there is nothing between them.

八字合化 is free to download; 十三行紫微斗數 for iPhone costs $39.99 up front. 八字合化 sells 1 one-off in-app purchase. 十三行紫微斗數 for iPhone asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | 十三行紫微斗數 for iPhone | 八字合化 |
| --- | --- | --- |
| Price | $39.99 | **Free** |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/id1499070435/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | **20.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Paid | — |
| Size | 19 MB | 71 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Firm 13 Limited](https://appshunter.io/developer/294205351) | [Chun wai Ho](https://appshunter.io/developer/642692620) |

## What reviewers say

### 十三行紫微斗數 for iPhone

[App page](https://appshunter.io/ios/app/for-iphone/id899029517)

This professional astrology app generates detailed Zi Wei Dou Shu charts with advanced analysis features. It allows for multi-layer display of planetary movements and astrological influences, offering extensive customization for various astrological schools.

**Highlights:** Multi-layer display of planetary movements and influences, Detailed analysis of Four Transformations (Si Hua), Extensive customization for astrological parameters, Support for various astrological schools and interpretations, Backup and transfer of birth records via iTunes File Sharing, User-friendly interface with Traditional and Simplified Chinese options

**In-app purchases:** none


### 八字合化

[App page](https://appshunter.io/ios/app/id1499070435)

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 無限制 | $21.99 | one-time |


## Frequently asked questions

### Is 十三行紫微斗數 for iPhone free?

十三行紫微斗數 for iPhone costs $39.99, with no in-app purchases.

### Is 八字合化 free?

八字合化 is free to download, with in-app purchases available.

### Do 十三行紫微斗數 for iPhone or 八字合化 have ads?

Neither 十三行紫微斗數 for iPhone nor 八字合化 shows ads.

### Which is updated more often, 十三行紫微斗數 for iPhone or 八字合化?

十三行紫微斗數 for iPhone ships an update every 3 months, and 八字合化 every 3 months. Most recently, 十三行紫微斗數 for iPhone was updated on October 24, 2026 and 八字合化 on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*