# 极调研 vs Bala量化

The clearest difference is in-app purchases: 极调研 at none against Bala量化's 6. 极调研 also leads on update cadence (every 4 days vs fortnightly) and iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Bala量化 sells 6 in-app purchases, starting at $3.99 per month. 极调研 asks for nothing beyond the download.

极调研 ships an update every 4 days, Bala量化 fortnightly. The most recent releases landed on October 10, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 极调研 | Bala量化 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Fortnightly |
| Size | 128 MB | 27 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [SHENZHEN GURU CLUB INFORMATION TECHNOLOGY CO.,LTD.](https://appshunter.io/developer/1093748365) | [晓东 陈](https://appshunter.io/developer/849609408) |

## What reviewers say

### 极调研

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

**Features:** Vision Pro support

**In-app purchases:** none


### Bala量化

[App page](https://appshunter.io/ios/app/bala/id6766252962)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 普通会员 - 1个月 | $3.99 | per month |
| Plus 会员 - 1个月 | $9.99 | per month |
| Pro 会员 - 1个月 | $14.99 | per month |
| 普通会员 - 12个月 | $39.99 | per year |
| Plus 会员 - 12个月 | $99.99 | per year |
| Pro 会员 - 12个月 | $149.99 | per year |


## Frequently asked questions

### Is 极调研 free?

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

### Is Bala量化 free?

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

### Do 极调研 or Bala量化 have ads?

Neither 极调研 nor Bala量化 shows ads.

### Which is updated more often, 极调研 or Bala量化?

极调研 ships an update every 4 days, and Bala量化 fortnightly. Most recently, 极调研 was updated on October 10, 2026 and Bala量化 on October 24, 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.*