# 极调研 vs Trader Days

The clearest difference is iOS requirement: 极调研 at 13.0 against Trader Days's 17.2. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

极调研 ships an update every 4 days, Trader Days every 3 days. The most recent releases landed on October 10, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | 极调研 | Trader Days |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 days | **Every 3 days** |
| Size | 128 MB | 3 MB |
| Requires iOS | **13.0** | 17.2 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SHENZHEN GURU CLUB INFORMATION TECHNOLOGY CO.,LTD.](https://appshunter.io/developer/1093748365) | [天天点](https://appshunter.io/developer/1506115702) |

## What reviewers say

### 极调研

[App page](https://appshunter.io/ios/app/id1611323604)

**Features:** Vision Pro support

**In-app purchases:** none


### Trader Days

[App page](https://appshunter.io/ios/app/trader-days/id6806954273)

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

**In-app purchases:** none


## Frequently asked questions

### Is 极调研 free?

极调研 is free to download, with no in-app purchases.

### Is Trader Days free?

Trader Days is free to download, with no in-app purchases.

### Do 极调研 or Trader Days have ads?

Neither 极调研 nor Trader Days shows ads.

### Which is updated more often, 极调研 or Trader Days?

极调研 ships an update every 4 days, and Trader Days every 3 days. Most recently, 极调研 was updated on October 10, 2026 and Trader Days on October 29, 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.*