# 专利业务办理 vs Z2Y Java Principles

The clearest difference is price: 专利业务办理 at Free against Z2Y Java Principles's $1.99. 专利业务办理 also leads on iOS requirement (11.0 vs 15.6). Z2Y Java Principles's advantage is update cadence (every 5 days vs every 8 months) and device support (4 vs 2). On ads and in-app purchases there is nothing between them.

专利业务办理 is free to download; Z2Y Java Principles costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

专利业务办理 ships an update every 8 months, Z2Y Java Principles every 5 days. The most recent releases landed on June 5, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | 专利业务办理 | Z2Y Java Principles |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/id1616453855/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 5 days** |
| Size | 24 MB | 257 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Intellectual Property Publishing House](https://appshunter.io/developer/693990967) | [洁 欧阳](https://appshunter.io/developer/1715570257) |

## What reviewers say

### 专利业务办理

[App page](https://appshunter.io/ios/app/id1616453855)

**Features:** macOS Compatibility

**In-app purchases:** none


### Z2Y Java Principles

[App page](https://appshunter.io/ios/app/z2y-java-principles/id6504158005)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 专利业务办理 free?

专利业务办理 is free to download, with no in-app purchases.

### Is Z2Y Java Principles free?

Z2Y Java Principles costs $1.99, with no in-app purchases.

### Do 专利业务办理 or Z2Y Java Principles have ads?

Neither 专利业务办理 nor Z2Y Java Principles shows ads.

### Which is updated more often, 专利业务办理 or Z2Y Java Principles?

专利业务办理 ships an update every 8 months, and Z2Y Java Principles every 5 days. Most recently, 专利业务办理 was updated on June 5, 2026 and Z2Y Java Principles on September 9, 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.*