# Watermark Toolbox vs 公交ERP

The clearest difference is price: 公交ERP at Free against Watermark Toolbox's $2.99. 公交ERP also leads on ads (none vs shown) and update cadence (every 2 weeks vs every 4 months). On in-app purchases, device support and iOS requirement there is nothing between them.

公交ERP is free to download; Watermark Toolbox costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Watermark Toolbox ships an update every 4 months, 公交ERP every 2 weeks. The most recent releases landed on October 13, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Watermark Toolbox | 公交ERP |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Size | 278 MB | 39 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [冉 刘](https://appshunter.io/developer/1531594017) | [Toyou Tech. Co., Ltd.](https://appshunter.io/developer/903865258) |

## What reviewers say

### Watermark Toolbox

[App page](https://appshunter.io/ios/app/watermark-toolbox/id6443768369)

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

**In-app purchases:** none


### 公交ERP

[App page](https://appshunter.io/ios/app/erp/id6446076859)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Watermark Toolbox free?

Watermark Toolbox costs $2.99, with no in-app purchases.

### Is 公交ERP free?

公交ERP is free to download, with no in-app purchases.

### Do Watermark Toolbox or 公交ERP have ads?

Watermark Toolbox shows ads; 公交ERP does not.

### Which is updated more often, Watermark Toolbox or 公交ERP?

Watermark Toolbox ships an update every 4 months, and 公交ERP every 2 weeks. Most recently, Watermark Toolbox was updated on October 13, 2026 and 公交ERP on October 14, 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.*