A junior high student who reportedly has no computer wrote a cloud drive downloader with 6,500 stars on a phone

YunX is an open-source Android app: paste a cloud drive share link someone sent you, and it resolves the direct link and downloads it to your phone with multi-threading. The repo was created in Aug 6, reached over 6,500 stars in three months, and its installation package in Releases has been downloaded about 260K times, with zero promotion spend. Its stars didn't come from programmer circles. They came from Bilibili "resource-sharing accounts" pushing it video after video. Below: which slot it fills, where the traffic came from, how many stars followers got, and whether this path still works.

A Bilibili video from Aug 17

In Aug 17, 2026, Bilibili UP主 "林灵玲の科技小屋" posted a video (BV1sRbY61Eaj) recommending an Android app for "unthrottled cloud drive downloads." A Smzdm article from Aug 23 recorded its performance: 5 days, 15K views, 1,682 favorites; by Nov 6, the video had 51K views and 4,140 favorites.

The video claims it is "open source, no ads, no marketing or promotion," but the download link it gives is not GitHub; it's a UC cloud drive link. The title says "supports 512 multi-threading," while the project README lists the concurrency cap as 32 (an early version allowed up to 512; v1.2.5 rolled it back, and the author's changelog gives the reason as reducing platform risk-control exposure).

This video promoted YunX. Smzdm's original text: starting in Aug 15, Bilibili "suddenly had dozens of related videos at once"; at that time the project was 16 days old, had 700 stars, and its installer had been downloaded over 36K times. The pre-semester period was a download peak: online courses, exam prep materials, and multi-GB software packages were all sitting in cloud drives, and "real demand met a real tool."

The GitHub account behind the tool is CYQawa, registered in January 2025, with 8 public repositories, and this is the only one that's notable. A Zhihu article introducing it was titled "An open-source cloud drive downloader, and the author is actually a junior high student," which says the author "claims to have no computer and can't build a PC version"; the README also notes the project was developed and debugged in AndroidIDE (a mobile development environment). The junior high student identity is second-hand and unverified.

What problem it actually solves

The normal flow for downloading a file someone shared on a cloud drive: open the link in a browser → save it to your own drive → install that drive's client → put up with throttled speeds or buy a membership. Quark has become the main drive for short dramas, online courses, and resource sharing over the past two years, and on a phone one person often has to install three or four clients.

YunX compresses this into one step: paste the whole share link (it parses the extraction code itself), it lists the files, and one tap starts chunked, multi-connection downloading that keeps going with the screen locked and resumes after interruptions. For drives that require saving first (Baidu, Xunlei, Quark, etc.), it temporarily saves to your own account in the background, retrieves the direct link, then deletes the copy, so you do nothing manually; Quark and UC shares can be fetched without logging in. The interface is native Kotlin + Compose, with no sign-up, no in-app purchases, and no ads.

It now supports 10 cloud drives (Quark, UC, Xunlei, Baidu, 123, 139, 115, Guangya, Lanzou, and Lanzou Premium), and later added video and image-set parsing for Douyin, Xiaohongshu, Kuaishou, Weibo, AcFun, Bilibili, and Pixiv (README, 11-06).

Two sentences on the README's first screen are worth remembering:

YunX is and always will be free and open source. If you paid for it anywhere, you've been scammed; ask for a refund immediately.

Using Baidu Netdisk is not recommended, as it may lead to account risk control!

How the stars grew

Nearly doubled in a month, but slowing: 7 stars gained in the last 576 days, versus 7 in the 767 days before that.

A better measure of how many people use it than stars is installer downloads: 15 releases combined about 265K downloads, including one version (v1.2.6, released 08-29) at 77K, and the v10-31 release from 1.3.1 has reached 11-06K as of 21 (GitHub Releases, 11-06). This doesn't count people who got the installer from cloud drives or download sites, so actual installs are higher. The ratio of stars to downloads is roughly 1:40, which suggests most users are ordinary people rather than programmers who habitually star repos.

Where users come from

Bilibili resource-sharing accounts, the main channel. Besides the one at the top, 末春七虞 (08-31) got 26K views, 小菱awa (11-01) got 14.7K, and dozens more got a thousand to a few thousand views, many with the same pitch ("supports 512 multi-threading," "unthrottled magic tool"). Many videos link to Quark or UC cloud drives and codes instead of GitHub. Quark and UC both pay for new user referrals and save-to-drive commissions, so resource accounts likely monetize by pairing "free tool + drive link" (inference, unverified). In other words, the network promoting a tool that bypasses the drive is powered by the drive's own growth mechanics.

Long-form articles. The "junior high student" article on Zhihu, and a Smzdm long read with a back-to-school shopping tone that discusses risks.

linux.do. At least two sharing threads in the resource roundup (10-19 thread), with replies already saying "similar aggregated drive clients existed long ago; the most complete one now is YunX"; in this circle it has become the default answer.

Download sites, Telegram, QQ. 61ku, 32r, and k73 all list "YunX v1.3.1"; the Telegram channel "好软分享" reposts every version; the author has an official QQ group.

Releases are promotion in themselves. In 3 months there were 15 releases, expanding from 6 drives to 10 and adding 7 video platforms, and each version became a new topic for resource accounts ("YunX 1.2.6", "October latest version"). After the community-built desktop version YunX-Desktop came out, another wave of "the PC version is finally here" videos sent traffic back to the Android version.

Almost nobody in the English-speaking world has written about it; on X, only two or three accounts reposting trending GitHub projects have shared it, mostly Chinese accounts. It grew entirely inside the Chinese-language world.

Why this one

"Drive speed-up" is not a new category, and there have been many tools, but one very specific slot was open:

On a phone, across multiple drives, downloading other people's share links directly, open source and free with no ads: before August, no tool did all four. Nearly every Bilibili video's pitch boils down to this line: "one app on your phone handles every cloud drive."

Add two more things: timing, since late August is the back-to-school download peak; and story, "a junior high student wrote it on a phone, it's free forever, and anyone charging for it is a scammer." Compared with speed-up tools selling card keys, resource accounts had no qualms pushing it.

Who is already following, and how many stars they got

This is the section anyone considering following should read most closely. There are quite a few followers, and they picked up a fair number of stars:

A few things to note:

• The ports that fill gaps get the most stars. YunX has no desktop version, and one port picked up 3,000+ stars in two months, nearly 10x in one month.
• Copying it 6 weeks later, supporting a few more features, can still reach a thousand-plus stars (wenxi), but it grew through cross-promotion, so you need a good relationship with the original author.
• Some people also repackage YunX and sell license keys. The line in the YunX README that says "anyone charging for this is a scammer" ends up vouching for the project instead.
• It's licensed under AGPL, so any project built on its code must also be open source. Copying it into a closed-source commercial app carries a real cost.

The dark side of this path

• The legal risk is real. The author of PanDownload was arrested 2020 years ago, and the case was classified as "providing programs and tools for intrusion and illegal control of computer information systems" (cited by smzdm from Navigation News). That author earned money from the tool; YunX is completely free, so the risk is lower, but "free and open source" is no shield.
• Account risk. Comments on Bilibili already include people saying "I used this to download from Baidu Netdisk and got my account banned." The author themselves advises people in the README not to use Baidu.
• It can break at any time. Once a netdisk upgrades its risk controls, parsing stops and the project has to chase fixes. If a netdisk puts pressure on the author, the project could stop overnight.
• Growth is slowing, with both stars and downloads falling back from the back-to-school peak.

If it were you

B: worth a test, but don't build "yet another Android netdisk parser." YunX already holds that slot. The stars go to the parts it hasn't covered, and the whole path carries legal and account-ban risk.

Best suited for: indie devs who know the Chinese resource-sharing scene (Bilibili software channels, linux.do, Telegram channels) and can build native Android, iOS, or desktop clients. They must be okay with the project being interrupted by netdisk risk controls and needing ongoing maintenance.

Not for: anyone planning to charge, run ads, or sell memberships (monetization is exactly where PanDownload got into trouble, and it would immediately cost you the resource-account recommendations); anyone focused on English-speaking communities hoping to get stars from Hacker News and X (this demand barely exists there); or anyone with a real-name presence in China who is wary of any legal exposure.

How to do it: three directions, ranked from most to least confident:

1. Fill the platforms it doesn't cover. Desktop already has ports. The open slots are iOS (distributed via sideloading or self-signing), Android TV, and TV boxes (people want to watch netdisk shows and online courses on TVs). Demand likely exists, but iOS distribution is painful and TV already has older tools like TVBox, so search Bilibili first to see whether someone has already done it well.
2. Apply the same playbook to another category. Find a must-have need where mature desktop tools exist but mobile is empty, and build a native, open-source, ad-free app. Go for the lowest grey-area risk you can: for example, video-platform parsing (YunX added this later too), or batch download and format-conversion tools that are currently desktop-script-only.
3. Ally with the original author, don't compete with them. YunX-Desktop is listed in the YunX README as the "official PC version," and wenxi and YunX recommend each other. Those two are the most-starred followers. Start by raising things in their issues and chatting in their QQ groups, and build the features their roadmap explicitly says they won't do.

Copy the AGPL license, put "free forever, anyone charging is a scammer" on the first screen of the README, and proactively steer users away from strict-risk-control netdisks like Baidu.

How to get users: You don't need to make videos yourself. Once it works, post in the linux.do resource thread and mention it in the original project's issues or groups. After that, Bilibili resource-sharing accounts will do the rest, because what they lack is topics. Release a new version every two or three weeks, each with one update line that works as a video title ("Added XX netdisk," "TV version is here"), and the resource accounts will promote it again.

Timing: Download peaks come around the start of the semester (late February in 2027) and before and after winter break, so aim to ship the first working version before the end of January.

Signs you're reading this wrong: ① YunX or a follower gets a legal letter or takedown from a netdisk, or the author announces they're stopping development. The legal risk has materialized, so don't keep going. ② YunX's new stars over the last 7 days drop below 200, and new-version downloads stay under 10k. Demand is fading, and ports won't get stars either. ③ A netdisk launches a free "download shared files directly on mobile, no speed limit" feature. The gap has been filled by an official player. ④ The reverse: an iOS or TV version gets over a thousand stars within a month. The platform-gap path is real, so move fast.

Sources

• GitHub: CYQawa/YunX README and Releases (11-06); daily star counts (10-01 to 11-06); repo pages for tidain/YunX-Desktop, z7786/wenxi, jiayuxuan123/YunGet, and hmjz100/LinkSwift.
• smzdm: "16 days, 700 stars, 36k downloads: the netdisk speed tool 'YunX' blows up...", 2026-08-23.
• Zhihu: "Open-source netdisk download tool, and the author is a middle schooler."
• Bilibili: BV1sRbY61Eaj, BV1dyth6DExL, BV13CxW6HEVo, BV1XRnG61EBo, BV1B2eQ6aEke; plays and favorites as of 11-06.
• linux.do: topic 3045795 (10-19), 3089218.
• Download sites 61ku, 32r, k73; Telegram channel "Haoruan Share."
• Where it says "inferred" or "unverified", it's an inference.