Z2Y Java Principles vs 快压
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Z2Y Java Principles
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Here, you can learn the principles of Java and its related knowledge for work, creation, and interviews, among other purposes. Use the system to track and manage your learning, and add notes at any time, making it easy to secure an offer. Future updates will include: adding local & online bookmarks, learning report statistics, learning plan reminders; the default knowledge base content will be continuously updated!!
快压
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快压是一款专门用于iOS 设备文件解压缩和文件压缩的文件管理工具 【为什么需要使用“快压”】 您是否碰到微信或者QQ收到RAR压缩文件,但是点击之后发现没有应用可以打开这个文件，查看这个文件的内容，只能通过分享至电脑，通过电脑解压查看。费时费力 您是否碰到出门在外，但是需要发送一些文件给自己的朋友和同事，但是文件繁杂，且文件未经压缩，浪费流量。 您是否在手机上操作压缩，但是文件内容需要进行保密，无法进行加密压缩 【“快压”能解压那些压缩文件】 1.支持解压 RAR, Zip, 7z, Lzh, ZIPX, TAR, GZIP, BZIP, TGZ, TBZ, ISO, DEB, CAB, JAR, RPM, CBS等等可能碰到的各种压缩文件 2.支持文件的压缩、加密压缩 3.支持多种格式的文件预览 4.文档的扫描及扫描文档转文字 5.采集录音，并提取录音中的文字信息 【“快压”隐私政策】 我们APP不会收集上传您的任何数据，充分尊重并保护您的隐私
Screenshots
Verdict
The clearest difference is price: 快压 at Free against Z2Y Java Principles's $1.99. Z2Y Java Principles's advantage is update cadence (every 5 days vs every 5 weeks) and device support (4 vs 2). On ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
快压 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.
Z2Y Java Principles ships an update every 5 days, 快压 every 5 weeks. The most recent releases landed on November 4, 2026 and October 27, 2026 respectively.
| Parameter | Z2Y Java Principles | 快压 |
|---|---|---|
| Price | $1.99 | Free — better |
| Update frequency | Every 5 days — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 18.6 |
| Further details — not scored | ||
| Size | 257 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | 洁 欧阳 | Bulb Network Technology Co., Limited |
In-app purchases
Z2Y Java Principles
No in-app purchases
快压
No in-app purchases
