# 炼刀机器人 vs Option Pricing Assistant

The clearest difference is price: 炼刀机器人 at Free against Option Pricing Assistant's $0.99. 炼刀机器人 also leads on in-app purchases (none vs 3) and iOS requirement (13.0 vs 17.6). On ads and device support there is nothing between them.

炼刀机器人 is free to download; Option Pricing Assistant costs $0.99 up front. Option Pricing Assistant sells 3 in-app purchases, starting at $9.99 per month. 炼刀机器人 asks for nothing beyond the download.

## The numbers

| Metric | 炼刀机器人 | Option Pricing Assistant |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | — |
| Size | 28 MB | 5 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [Docking Technology Co., Ltd.](https://appshunter.io/developer/1533396511) | [乐祥 胡](https://appshunter.io/developer/1572365721) |

## What reviewers say

### 炼刀机器人

[App page](https://appshunter.io/ios/app/id6745813167)

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

**In-app purchases:** none


### Option Pricing Assistant

[App page](https://appshunter.io/ios/app/option-pricing-assistant/id6771312371)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Option Pricing Assistant Pro-30days | $9.99 | per month |
| Option Pricing Assistant Pro-360day | $19.99 | per year |
| Option Pricing Assistant  lifetime | $49.99 | one-time |


## Frequently asked questions

### Is 炼刀机器人 free?

炼刀机器人 is free to download, with no in-app purchases.

### Is Option Pricing Assistant free?

Option Pricing Assistant costs $0.99, and also offers in-app purchases.

### Do 炼刀机器人 or Option Pricing Assistant have ads?

Neither 炼刀机器人 nor Option Pricing Assistant 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.*