# 紫白飛星萬年曆(奇門算法) vs Echosy

The clearest difference is price: Echosy at Free against 紫白飛星萬年曆(奇門算法)'s $11.99. 紫白飛星萬年曆(奇門算法)'s advantage is in-app purchases (none vs 1) and ads (none vs shown). On update cadence, device support and iOS requirement there is nothing between them.

Echosy is free to download; 紫白飛星萬年曆(奇門算法) costs $11.99 up front. Echosy sells 1 one-off in-app purchase. 紫白飛星萬年曆(奇門算法) asks for nothing beyond the download.

紫白飛星萬年曆(奇門算法) ships an update every 10 days, Echosy weekly. The most recent releases landed on October 4, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | 紫白飛星萬年曆(奇門算法) | Echosy |
| --- | --- | --- |
| Price | $11.99 | **Free** |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/id381697231/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 63.6% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 10 days | **Weekly** |
| Monetization | Paid | — |
| Size | 122 MB | 29 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Firm 13 Limited](https://appshunter.io/developer/294205351) | [Pong Ning Wong](https://appshunter.io/developer/1885145115) |

## What reviewers say

### 紫白飛星萬年曆(奇門算法)

[App page](https://appshunter.io/ios/app/id381697231)

This app provides detailed Zi Bai Fei Xing data and traditional Chinese calendar information for metaphysics enthusiasts. It features enhanced public holiday displays, bookmarking, and precise Feng Shui layout guidance, incorporating a unique algorithm for flight star transitions around solar terms.

**Highlights:** Detailed Zi Bai Fei Xing data (year, month, day, hour), Male/Female Ming Gua information, Date bookmarking, Solar term transition details, Public holiday display (China, HK, TW, SG), Gregorian/Lunar date search and conversion (1850-2150)

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

**In-app purchases:** none


### Echosy

[App page](https://appshunter.io/ios/app/echosy/id6760580353)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is 紫白飛星萬年曆(奇門算法) free?

紫白飛星萬年曆(奇門算法) costs $11.99, with no in-app purchases.

### Is Echosy free?

Echosy is free to download, with in-app purchases available.

### Do 紫白飛星萬年曆(奇門算法) or Echosy have ads?

Echosy shows ads; 紫白飛星萬年曆(奇門算法) does not.

### Which is updated more often, 紫白飛星萬年曆(奇門算法) or Echosy?

紫白飛星萬年曆(奇門算法) ships an update every 10 days, and Echosy weekly. Most recently, 紫白飛星萬年曆(奇門算法) was updated on October 4, 2026 and Echosy on October 1, 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.*