Most people searching for a Cemu emulator APK download for an old version have already hit the wall. The newest build crashes on their device, or a game that booted last month stopped booting, and they want to roll back to whatever they were running before.

The short version: the Cemu team does not publish an APK. Every Android build of Cemu comes from a community fork, the old versions are archived on that fork's GitHub releases page, and going backwards costs you your saves unless you back them up first.

What the Cemu Android APK actually is

Cemu is a Wii U emulator for Windows, Linux and macOS. It's open source under MPL 2.0 and lives at cemu-project/Cemu, with 2.6 as the current desktop stable release.

Android is not on the official roadmap. The Cemu FAQ still says so, and it goes further: it calls sites advertising a Cemu APK a scam. That line was written before the community port existed, and it's still the correct warning for most of what a search returns.

The real Android work happens in a fork by a developer called SSimco, at github.com/SSimco/Cemu. The README is blunt about what it is. Early, experimental, no guarantees on stability or performance, no timeline, and no bug reports wanted yet.

So when a page offers you "Cemu APK v3.5" with a download button and a comments section, it isn't an old version of anything. The fork's version numbers stop at 0.5.

Reasons to install an old version

Rolling back is a real fix, not superstition. Four cases come up.

A newer build regresses on your GPU. Cemu Android renders through Vulkan and has no custom driver picker, so you can't swap in a Turnip build the way you can on some Switch emulators. When a release changes how it talks to your Adreno or Mali driver, your only lever is the version number.

A feature you don't want arrived with side effects. 0.4 added controller rumble and motion. 0.5 added emulated USB device options. Each of those touches input handling.

A game worked on the older build. Compatibility on this port moves in both directions between releases.

Your handheld's setup guide was written against a specific version and you want to follow it exactly.

Device requirements before you download

An arm64 device. Vulkan capable GPU. Android 12 or newer, which is the floor reported when the alpha builds started circulating.

Beyond that, hardware matters more than it does for PSP or GameCube emulation. Coverage of the alpha builds found full speed play on the strongest 2025 gaming phones, and jittery results on chips a tier below that, including gaming handhelds. The Wii U's CPU is awkward to emulate and the port is young.

If your phone is mid range, expect to be testing rather than playing. That's the honest framing, and it applies to the newest build and every old one.

The step that wipes your saves

Read this before you touch anything.

Android refuses to install an APK over a newer version of the same app. You'll get "App not installed" with no explanation. The fix is to uninstall first, and uninstalling takes the app's data folder with it, including your mlc01 folder where Wii U saves live.

Back up first. Every time. The folder sits under Android/data/ on internal storage, and a file manager with access to that path will copy it out in a minute.

Installation steps for Android

1. Back up your existing Cemu data. Copy the whole Android/data/<cemu package>/files folder somewhere safe, or to a PC over USB. mlc01 inside it holds your saves.

2. Uninstall the installed build if you're downgrading. Long press the icon, App info, Uninstall. Skip this if Cemu isn't installed yet.

3. Open the releases page on the device. Go to github.com/SSimco/Cemu/releases in your browser. Nine releases are listed, tagged 0.1 through 0.5, plus older commit builds tagged by hash. 0.5 shipped on 25 April 2026.

4. Expand Assets on the release you want and take the APK. Each release has its own assets block. Download the .apk file, not the source archives. If you're rolling back one step from 0.5, that's the 0.4 tag.

5. Allow installs from your browser. Android will prompt on first attempt. Settings, Apps, your browser, Install unknown apps, turn it on. Turn it back off afterwards if you'd rather not leave it open.

6. Install and grant storage access. Open the downloaded file, install, launch. Grant the all files or media permission when Cemu asks, or it won't see your game folder.

7. Point Cemu at your games. Settings, General settings, Add game path, then select the folder holding your titles. .wua is the format to prefer. It's smaller and needs no key file. .wud and .wux require a keys.txt you dump yourself from your own console, which the official dumping guide covers.

8. Restore your backup. Copy mlc01 back into the app's files folder, then relaunch. Your saves should appear in the game.

9. Check compatibility before you blame the build. The Cemu compatibility wiki tracks per game behaviour, though its notes describe desktop Cemu rather than the Android port.

You'll know it worked when the game list populates with cover art and the title boots to its logo screen without the app closing.

Known issues you shouldn't try to fix by downgrading

Some faults sit in the port itself and follow you to every version.

There's no custom GPU driver selection. Gyro input has an inverted horizontal axis. Mario Kart 8 has reported rendering problems with gliders, some character skins and certain track surfaces, plus an infinite load after choosing Next Race or Quit. Twilight Princess HD doesn't draw its minimap correctly.

Rolling back won't clear those. Rolling back is for the fault that appeared when you updated.

Troubleshooting

"App not installed" on the older APK. The newer build is still on the device. Uninstall it, then install again.

Game list is empty after install. The storage permission was denied, or the game path points at a parent folder. Re add the path from inside the folder holding the files.

Crash on launch, every time, on every game. Try a different release before anything else. Driver behaviour varies enough between builds that this is the cheap test.

Saves gone after downgrading. They went with the uninstall. Restore your backup copy of mlc01. Without a backup they're not recoverable from the device.

Online features unavailable. The port logs a missing crypto file and disables online mode. That's expected without files dumped from your own console.

Fake APK sites and what they cost you

Search results for a Cemu APK are dominated by pages that repackage the fork, or that host something else entirely under the name. They add version numbers the project never used, install prompts for other apps, and occasionally a modified binary.

Two rules keep you out of it. The releases page in step 3 is the only place a genuine build comes from. Any page offering a Cemu APK with an installer, an account, a survey or a version above 0.5 is not distributing Cemu.

For anything that runs natively on your phone rather than through an emulator, ModFuze's app and game listings show version and file size before you commit to a download.

FAQ

Version compatibility

Written against SSimco's Cemu Android fork at release 0.5 (25 April 2026) and desktop Cemu 2.6. Version numbers, folder paths and menu names on an experimental port change without notice, so check the release notes on the tag you install.

What you should do now

If Cemu on Android worked yesterday and doesn't today, back up mlc01, uninstall, and install the previous tag from the fork's releases page. That's the whole fix, and it takes ten minutes.

If it has never worked on your device, an old version isn't going to change that. A Cemu emulator APK download of any old version still needs a phone at the top of the current range, and the port is early enough that a weaker device isn't going to get there on a version change alone. Desktop Cemu on a laptop you already own will give you the Wii U library today.

More Android emulation guides sit on the ModFuze blog.