# 石化招采 vs 掌证通

The clearest difference is update cadence: 石化招采 at every 2 months against 掌证通's every 19 months. 石化招采 also leads on iOS requirement (10.0 vs 13.0). 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.

石化招采 ships an update every 2 months, 掌证通 every 19 months. The most recent releases landed on September 15, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | 石化招采 | 掌证通 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 19 months |
| Size | 95 MB | 28 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [China Petrochemical Corporation](https://appshunter.io/developer/1404188289) | [Shanghai Electronic Certificate Authority Center Co.,LTD](https://appshunter.io/developer/924307388) |

## What reviewers say

### 石化招采

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

**Features:** macOS Compatibility

**In-app purchases:** none


### 掌证通

[App page](https://appshunter.io/ios/app/id6450326978)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 石化招采 free?

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

### Is 掌证通 free?

掌证通 is free to download, with no in-app purchases.

### Do 石化招采 or 掌证通 have ads?

Neither 石化招采 nor 掌证通 shows ads.

### Which is updated more often, 石化招采 or 掌证通?

石化招采 ships an update every 2 months, and 掌证通 every 19 months. Most recently, 石化招采 was updated on September 15, 2026 and 掌证通 on September 8, 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.*