There is “Oscilloscope” which can show frequencies and their intensity

See https://f-droid.org/packages/org.billthefarmer.scope/

FitoTrack may be suitable for that.

If the Map is not fitting totally you can even correct it on OpenStreetMap.org by yourself

FitoTrack is a nice open source fitness tracker which shows the path on OpenStreetMap background. It logs position and speed data.

You can create a custom workout which shows you the current speed instead of average.

https://f-droid.org/packages/de.tadris.fitness/

What do you actually need it for?

https://github.com/ente-io/ente

Fully open source, End to End Encrypted alternative to Google Photos and Apple Photos

1. Easier installation.
2. Mint configuration of desktop settings
3. Mint tools (Warpinator, Hypnotix)

But where to get the AppImages from? Who’s maintaining? How to do Security Vulnerality Tracking for them?

Better put that into a spoiler!

I"ve found so far:

a DVD of The Core (2003)
a secret glade
a holographic Charizard business card
a marsh wren
a tumbleweed
a cool bug
a pretty leaf
11 squares packed into a larger square
a normal-looking leaf
an orb wren
a necklace of element samples whose symbols spell out your name
the Principality of Sealand
a rock with neat stripes
The Long Now Foundation's archive of every Animorphs book
a broken smoke machine
a friendly jumping spider
a spider-silk scarf
a block of scandium
a pair of platonic solids, not quite touching
a really cool data point
baby shoes (and baby)
a friend
two Andalites, one canonical
the Heart of the Ocean
a Rhode Island the size of an ant
a piece of pumice

How many items can be found?

I don’t get your point. Why should somebody do this every day?

As the experience from other users in this thread, it seems not extremely rare to have an overgrown ~/.cache/ folder. So checking it from time to time is a good advice. If we all do this for a time, and create bug tickets for software which is not cleaning up. Then this problem will hopefully go away with future software releases.

Because some users experienced accidential grows like OP had 160 Gbyte. So general advice for linux users can be stated as: Check your ~/.cache every now and then

Critical systems/servers shall better be monitored as you suggest.

not necessarily during runtime

So OP’s headline should be saying instead: Reminder to CHECK your ~/.cache folder every now and then

I always felt that there should be some user directory like /tmp/ which will be wiped regularly.

Is it safe to clear ~/.cache/mozilla/ while Firefox is running?

Most delivery companies actually use OpenStreetMap in Europe. Especially if they deliver with bicycles, since OpenStreetMap has much more accurate mapping for bikes. Especially bike lanes and very often also smoothness, ground material. And also if bikes are allowed on the opposite direction of a one way street.

Can the Fedora Flatpaks be browsed and downloaded for other distros?

Even if you have trust. There can be security vulnerabilites in apps we are using. Flatpak seems to not really help in any way.

Think about service providers (government, banking, messaging, streaming, gaming). To participate in life we might depend on some of their services but don’t fully trust these parties. Flatpak is not secure/sandboxed enough to run untrusted apps. Meanwhile on Android the situation looks much better.

Problems:

• you need an additional solution for Wifi captives portals, at least there is a gap in your solution for this situation
• intercontinental travelling might not be fun

That doesn’t help outside of home. When we are in an untrusted network then the DNS mess makes us vulnerable for spoofing attacks.