# 玄空六爻解卦 vs ROI计算

The clearest difference is price: ROI计算 at Free against 玄空六爻解卦's $4.99. ROI计算 also leads on in-app purchases (none vs 1). 玄空六爻解卦's advantage is iOS requirement (9.0 vs 13.0). On ads and device support there is nothing between them.

ROI计算 is free to download; 玄空六爻解卦 costs $4.99 up front. 玄空六爻解卦 sells 1 one-off in-app purchase. ROI计算 asks for nothing beyond the download.

## The numbers

| Metric | 玄空六爻解卦 | ROI计算 |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Positive reviews | 65.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Size | 16 MB | 70 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [晓宇 刘](https://appshunter.io/developer/982103421) | [天门市万纺信息技术有限公司](https://appshunter.io/developer/1772867820) |

## What reviewers say

### 玄空六爻解卦

[App page](https://appshunter.io/ios/app/id982103422)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 完整解卦分析 | $2.99 | one-time |


### ROI计算

[App page](https://appshunter.io/ios/app/roi/id6747033622)

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

**In-app purchases:** none


## Frequently asked questions

### Is 玄空六爻解卦 free?

玄空六爻解卦 costs $4.99, and also offers in-app purchases.

### Is ROI计算 free?

ROI计算 is free to download, with no in-app purchases.

### Do 玄空六爻解卦 or ROI计算 have ads?

Neither 玄空六爻解卦 nor ROI计算 shows ads.

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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.*