# 研牛股票 vs ChartLab

The clearest difference is in-app purchases: 研牛股票 at none against ChartLab's 2. 研牛股票 also leads on update cadence (weekly vs every 3 weeks) and iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. ChartLab sells 2 one-off in-app purchases. 研牛股票 asks for nothing beyond the download.

研牛股票 ships an update weekly, ChartLab every 3 weeks. The most recent releases landed on October 9, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | 研牛股票 | ChartLab |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 weeks |
| Size | 62 MB | 30 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [广东科德投资顾问有限公司](https://appshunter.io/developer/1040025730) | [YoElephant](https://appshunter.io/developer/1894442353) |

## What reviewers say

### 研牛股票

[App page](https://appshunter.io/ios/app/id6793352673)

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

**In-app purchases:** none


### ChartLab

[App page](https://appshunter.io/ios/app/chartlab-candlestick-training/id6798086693)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Quarterly Membership | $36.99 | one-time |
| Annual Membership | $89.99 | one-time |


## Frequently asked questions

### Is 研牛股票 free?

研牛股票 is free to download, with no in-app purchases.

### Is ChartLab free?

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

### Do 研牛股票 or ChartLab have ads?

Neither 研牛股票 nor ChartLab shows ads.

### Which is updated more often, 研牛股票 or ChartLab?

研牛股票 ships an update weekly, and ChartLab every 3 weeks. Most recently, 研牛股票 was updated on October 9, 2026 and ChartLab on October 17, 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.*