# 光证小黑板 vs 经开区污水排放监管

光证小黑板 and 经开区污水排放监管 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

光证小黑板 ships an update monthly, 经开区污水排放监管 every 2 weeks. The most recent releases landed on September 16, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | 光证小黑板 | 经开区污水排放监管 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Size | 71 MB | 134 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [EverBright Securities Asset Management Co.,Ltd.](https://appshunter.io/developer/1516210273) | [Jiangsu Hongli Intelligent Techn ology Co.,Ltd](https://appshunter.io/developer/1406229895) |

## What reviewers say

### 光证小黑板

[App page](https://appshunter.io/ios/app/id1542010166)

**Features:** macOS Compatibility

**In-app purchases:** none


### 经开区污水排放监管

[App page](https://appshunter.io/ios/app/id6444393639)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 光证小黑板 free?

光证小黑板 is free to download, with no in-app purchases.

### Is 经开区污水排放监管 free?

经开区污水排放监管 is free to download, with no in-app purchases.

### Do 光证小黑板 or 经开区污水排放监管 have ads?

Neither 光证小黑板 nor 经开区污水排放监管 shows ads.

### Which is updated more often, 光证小黑板 or 经开区污水排放监管?

光证小黑板 ships an update monthly, and 经开区污水排放监管 every 2 weeks. Most recently, 光证小黑板 was updated on September 16, 2026 and 经开区污水排放监管 on September 18, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*