I love those thank you!

Top 3 examples for the stuff you can do that’s so worthwhile?

Any reccos over duckduckgo? Been quite pleased with it.

I do this for a living if you get stuck and want to DM. I’d recco just getting a Focusrite Scarlett usb interface with enough inputs. Are you DIing your guitar (plugging it in) or recording it with a mic? There are plenty of free recording options. You on PC? If mac I’d just start with Garage Band. PC you could maybe just start with Audacity. Ardour is open source but I don’t have experience with it. Reaper has infinite demo mode. There’s a free pro tools but that might be a bit of a steep learning curve. If you want to add electronic elements it might be worth starting with one of the intro versions of Ableton.

V wholesome. Hope it takes off :).

Findroid - For watching and syncing my Jellyfin library to my phone to watch films and TV on my commute.

Newpipe - I use to sync YouTube videos offline and background play etc.

Spectdroid - I’m a sound designer and having quick access to spectral info is great.

Mini Piano Pro - Always using this to check what key a track is or what a note is.

Fitbit - I use this to track my macros for my weight training.

Kiwi Browser - Browser with Adblock and chrome plugins. I guess I use this a lot to access the front end management apps on my home server.

Genius Scan - Really good pdf scanner.

Tuner (Boss) - Guitar tuner.

Total Commander - Good file manager for my network.

Termux - Terminal emulator.

I think those cover the jist of the question. I like apps like Ampere but don’t think they quite fall into the category you’re enquiring about. I imagine the niche side of your request would put Spectdroid as number one, a bunch of the others are pretty obvious after rereading your question.