Some people may want to run multiple instances of Juggluco because they use the Mirror function for multiple others or use Juggluco also for themselves.

Android doesn't allow multiple apps with the same Application id. By changing the application id, you can install multiple instances of an app.

Here is a link to a version of Juggluco with a different application id:

Juggluco 9.0.18 Second

If you need more than two, you can do the following:

First you need to get the universal apk of Juggluco from Juggluco's website (At the top of https://www.juggluco.nl/Juggluco.)

That single apk you can decompile with

apktool d filename.apk

Then edit dirname/AndroidManifest.xml

On the top is package="tk.glucodata". Change tk.glucodata to something else.

Also remove

<provider android:authorities="tk.glucodata.androidx-startup" android:exported="false" android:name="androidx.startup.InitializationProvider">
            <meta-data android:name="androidx.emoji2.text.EmojiCompatInitializer" android:value="androidx.startup"/>
            <meta-data android:name="androidx.lifecycle.ProcessLifecycleInitializer" android:value="androidx.startup"/>
</provider>

It seems to be some kind of nonsense that android studio adds to the manifest and has to have a unique name.

Now recompile with:

apktool b dirname -o unaligned.apk

zipalign -f -p unaligned.apk renamed.apk

apksigner sign --ks-pass 'pass:IDontKnow' --ks everyone.keystore renamed.apk

For this you need everyone.keystore for a key to sign. You can make it yourself.