# 大采购 vs 石化招采

The clearest difference is update cadence: 大采购 at every 4 weeks against 石化招采's every 2 months. 石化招采's advantage is iOS requirement (10.0 vs 12.0). On price, ads, in-app purchases and device support there is nothing between them.

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

大采购 ships an update every 4 weeks, 石化招采 every 2 months. The most recent releases landed on May 18, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | 大采购 | 石化招采 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 2 months |
| Size | 52 MB | 95 MB |
| Requires iOS | 12.0 | **10.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [北京筑龙信息技术有限责任公司](https://appshunter.io/developer/1052056113) | [China Petrochemical Corporation](https://appshunter.io/developer/1404188289) |

## What reviewers say

### 大采购

[App page](https://appshunter.io/ios/app/id1554435345)

**Features:** macOS Compatibility

**In-app purchases:** none


### 石化招采

[App page](https://appshunter.io/ios/app/id6444849755)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 大采购 free?

大采购 is free to download, with no in-app purchases.

### Is 石化招采 free?

石化招采 is free to download, with no in-app purchases.

### Do 大采购 or 石化招采 have ads?

Neither 大采购 nor 石化招采 shows ads.

### Which is updated more often, 大采购 or 石化招采?

大采购 ships an update every 4 weeks, and 石化招采 every 2 months. Most recently, 大采购 was updated on May 18, 2026 and 石化招采 on September 15, 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.*