In my experience the best way to improve budget/old android phone performance is to disable as much random preinstalled crap as possible. Some stuff you can't disable directly through phone settings so you need adb. My phone is a budget phone from over a decade ago now and still going strong.

I liked using this software last time I was doing that to my ancient phone and have had zero issues using the preset lists to disable stuff. No updates in the last few years though so might be worth doing a little extra vetting before use. https://github.com/0x192/universal-android-debloater

What does it do? Execute this script nightly?

https://github.com/50YearsPhone/vision-50-years-phone/blob/m...

Is it really necessary to install two huge external dependencies for this, F-Droid and Termux? No easier way to execute a few lines of code?

Also, what does that script even do? As far as I can see: Nothing. It clears files that would not exist if you did not install this whole thing. Is it a complete hoax, or am I missing something?

Looks like the script itself isn't doing much at all.

https://github.com/50YearsPhone/vision-50-years-phone/blob/m...

Software equivalent of one of these fuel or power saver plugs that blinks an LED at the idiot who paid the money.

Is this a joke I don't understand? Aren't Android apps sandboxed? How does these two commands supposed to make my phone fast for 50 years?

rm -rf ~/.cache/* 2>/dev/null

rm -rf /data/data/com.termux/files/usr/tmp/* 2>/dev/null

Source: https://github.com/50YearsPhone/vision-50-years-phone/blob/m...

Looks like vibe-coded slop that won't even work. And if it did, it's a security breach waiting to happen.