I'm currently in the process of reading the excellent "Lessons Learned in Software Testing: A Context-Driven Approach". Early on the following is mentioned.

Test common threats before exotic threats.

Seems reasonable enough. That said, it got me thinking It'd be cool to generate a list of such threats for future devs/testers to draw on. So...I'm calling on the collective experience of any Tilders involved in iOS or Android development to lend a hand.

In your time working on mobile, what issues have you encountered that you would you classify as exotic? I.e those issues that infrequently arise but when they do can cause major damage. Any and all help is appreciated.

I've never really been into gaming on my phone, but in the last couple of weeks I've found it's particularly good for entertainment while getting the baby off to sleep. He tends to need holding for 5-20 minutes, during which time no interaction is needed and something to stave off the boredom is good.

I've been playing Tiny Bubbles which is good because the levels are relatively short and discrete, it's challenging without being too hard (at 4am I don't want that much of a challenge), it's mostly not timing-based, I can play one-handed and drop it at a moment's notice without particularly being penalised.

Any suggestions for other suitable games would be appreciated.

I just picked up a Nokia 3.1 for $120 in a bit of an emergency and I really like it. It's very light, Android One, very nice styling and again it's $120!

I was shocked by this experience at this price point. This thing is excellent for my use case, as a pre-paid EU phone as my lovely iPhone 6s Plus has only one Sim slot. Are there any other great budget phones out there?

There doesn't appear to be an app for tildes unless I'm not looking using the right name, how would users here feel about an app similar to what reddit has like reddit is fun or Joey? I'm mainly on my phone and while it's still easy to navigate by browser would love a similarly structured app for tildes. What do you guys think?

What are some apps that you use that aren't particularly well known? Let's help each other discover some interesting new tools!

lichess - best chess app out there IMO. Completely free and open source, has daily puzzles, and a pretty active pool of users to play against!
Syncthing - file syncing tool that works with just about any operating system (although I don't think it works with iOS). I use it to take notes and write lyrics/my journal and sync them back to my linux laptop.
Untappd - social media app for tracking craft beers that you drink. I've only just started using it, since I was on holiday and wanted to keep a note of the ales I was drinking. It's a free app, but supported by ads. I believe there's a paid tier, but the free version works well enough, and it's useful for encouraging me and my friends to try new beers when we're out and about.
WK - Japanese flashcard app, which is technically a front-end for the wanikani service. As you learn new radicals, characters, and vocabulary, it serves them back up to you after a certain length of time. If you remember it, it'll wait longer next time, and if you don't get it right, it brings it back to the top of the pile.