At my job, we have neither signal nor wifi in certain places (bathroom in the basement). So would appreciate tips on apps to kill five minutes.
I’ve got a few games on my phone for when I’m flying. Minesweeper, Freecell, Alpha Omega…
If you like chess puzzles: https://f-droid.org/en/packages/jwtc.android.chess/
It’s a full-featured chess app, but what’s nice about it is that it’s also got a large amount of short chess puzzles that are available offline (unlike lichess).
Gubbins is a fun, new kind of word game.
Nonogram is a fun puzzle game.
I little too specific but when I have spare time I use AnkiDroid to memorize kanji.
Radial
I like Flow Free and their other related games for wasting time.
Flow FreeSudoku! There’s a few different apps on F-Droid, take your pick of the one that looks the best to you. The underlying game is the same, but some apps have different versions that add some complexity to keep you thinking.
There’s one that I really like called Sudokyuu. Unfortunately, it has been taken of the Play Store but the APK can be found online.
If you like reading books, comics, etc, maybe Librera Reader?
Dunno how it is on Google Play, but it’s available FOSS and DRM free outside of it:
https://f-droid.org/packages/com.foobnix.pro.pdf.reader/Lots of good, free, out-of-copyright books on gutenberg.org
You can read them on Librera or any ereader app
Also you can pirate from Anna’s Archive.
There are also a bunch of books from project Gutenberg that have images and nice formatting on standardebooks.org/
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fdroid 2048 - for my 1 minute elevator ride
Started a 6x6 game months ago and am still not done yet. It’s super repetitive but perfect to just reset your mind for a while every now and then
self-promotion caveat: I’m building my sudoku game to be offline and fully accessible: https://play.google.com/store/apps/details?id=digital.cyberpuffin.sudoku
The only thing that might constitute an “ad” is a button on the main menu that leads to a promotion page for my print-on-demand book.
Either (or both) of the two games by this developer: https://play.google.com/store/apps/dev?id=8857752720402747582
Been playing Gauguin. It’s like sudoku but with math to solve.
Deck’em and Strategery