# 刀刃 vs K线训练

The clearest difference is price: K线训练 at Free against 刀刃's $2.99. 刀刃's advantage is in-app purchases (none vs 2) and update cadence (every 4 days vs every 3 weeks). On ads, device support and iOS requirement there is nothing between them.

K线训练 is free to download; 刀刃 costs $2.99 up front. K线训练 sells 2 in-app purchases, starting at $2.99 per month. 刀刃 asks for nothing beyond the download.

刀刃 ships an update every 4 days, K线训练 every 3 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 刀刃 | K线训练 |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Positive reviews | — | 85.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 3 weeks |
| Monetization | — | Freemium |
| Size | 6 MB | 20 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [同凯 孙](https://appshunter.io/developer/1823806591) | [艳 王](https://appshunter.io/developer/6800156918) |

## What reviewers say

### 刀刃

[App page](https://appshunter.io/ios/app/id6748015867)

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

**In-app purchases:** none


### K线训练

[App page](https://appshunter.io/ios/app/k/id6800353079)

Practice stock trading with historical data without risking real money. Develop trading discipline by setting and adhering to your own rules for buying, selling, and position sizing. Track your progress and identify areas for improvement.

**Highlights:** Historical K-line simulation, Day trading simulation, Trading discipline enforcement, Performance reporting, Targeted skill training, Leaderboards, Practice record review

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 进阶版（月） | $2.99 | per month |
| 进阶版（年） | $24.99 | per year |


## Frequently asked questions

### Is 刀刃 free?

刀刃 costs $2.99, with no in-app purchases.

### Is K线训练 free?

K线训练 is free to download, with in-app purchases available.

### Do 刀刃 or K线训练 have ads?

Neither 刀刃 nor K线训练 shows ads.

### Which is updated more often, 刀刃 or K线训练?

刀刃 ships an update every 4 days, and K线训练 every 3 weeks. Most recently, 刀刃 was updated on October 24, 2026 and K线训练 on October 25, 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.*