Edit:

This was resolved by @tomf (cf. this comment).

Google’s account authentication appears to broken for me for some reason.

I have several devices and several Google accounts accumulated over the years.

Accounts:

1. Work Google account (this was set up by IT staff at the company where I work as they are a paying enterprise Google services customer)
2. Undergraduate University account (this was set up when I attended undergrad, where the University is a paying Google services customer)
3. Graduate University account (this was set up when I attended for grad school, where the University is a paying Google services customer)
4. Personal Google account (this was set up a long time ago, it’s just a non-paid, consumer Google account)

Under iOS and iPad OS, Google apparently asks you to download the official Google app in order to sign in and “trust” devices, so that they can send you prompts to acknowledge when you sign in on other devices. There is also the Google Authenticator app that lets you do traditional 2FA.

Further background, I got an iPhone 12 Pro circa October 2020. I gave my old iPhone handset to my dad (after signing out of everything and resetting it according to Apple’s instructions). Ever since, I’ve been having issues with logging into my Google accounts from the new iPhone, my iPad, and my Mac (provided by work). I’m actually afraid to log out of my work Google account on my work Mac, because I’m afraid I won’t be able to log in again, and that would prevent me from being able to get work done.

For example, let me walk through the steps I would normally take to log in to my Undergraduate University Google account on my iPad:

1. Open the Google app
2. Tap user icon in top right corner
3. From the modal menu, tap the downward chevron (circled in red)
4. Tap “Add another account” (circled in red)
5. Tap “Continue” on the confirmation widget when prompted
6. Enter the Gmail address for the account in the provided “Email or phone” input box and tap “Next”
7. At this point, I wait for the progress indicator (the blue bar with the red arrow pointing to it) to indefinitely traverse from left to right over and over again and I cannot progress further.

Virtually the same steps can be reproduced from my iPhone by going to accounts.google.com from any browser (I’ve tried Safari and Chrome).

The same sort of authentication redirect from accounts.google.com happens when trying to add my associated Gmail accounts to my iOS devices from the Settings > Mail > Accounts > Add Account, and similarly stalls at the same point.

I’ve tried logging out of my accounts from my personal Mac where I can still log in from google.com, and also tried going into the security settings for the accounts and disabling, then re-enabling 2FA (I can receive the text message with the code to associate my iPhone as a second factor authenticator, so Google knows my phone number).

Google’s support documents don’t provide any guidance on this situation where the accounts.google.com authentication hangs, and there seems to be no way to contact a human being at Google to provide technical support. I’ve searched their help portal/forums, and found nothing similar to my issue. They point me down a tree that ends here, which is not useful to me.

If Google’s services don’t work for you, it seems to be your problem, not theirs. I get that I’m not paying for their services, so it is totally unreasonable for me to expect any sort of technical support from Google. But, at the same time, it seems very strange that I am alone in my use case of simply trying to log into my accounts that have worked for years in the past without issue.

Anyone have advice on next steps?

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.

In the rare chance you haven't heard of Flutter, here's the link: https://flutter.io

Flutter just officially left beta with v1.0 December 4, last year. The code is written in Dart, and deploys on Android, and iOS (and will run natively on the rumored Fuchsia OS).

So for those of you that have used Flutter or are currently using Flutter.

• What are you working on?
• Why'd you choose Flutter?
• What do you like about Flutter?
• And what do you dislike about Flutter?

I'll start:

I'm working on a niche art app. I myself do not do that type of art, but knowing people that do, I wanted to create a tool to fill in the lackluckster market for Chromebooks and Android.
I chose Flutter because:

• I wanted to try something new, and what newer than something that was (at the time) in beta?
• Custom Views in Android are a hassle.
• I will be able to release on both Android and iOS (semi-)natively without having to code it twice.

Here's what I like about Flutter:

• Layouts are really simple.
  (though you can easily let it get clustered if you don't think too much about it.)
• Design isn't an afterthought.
  Animations are built in (and simple), themes aren't hard-coded, and Material Components get more attention here. (Still waiting for Shapes on Android)
• It's fast by design.
  Flutter uses its own custom rendering engine (Skia). I've never experienced any stutter with the built-in components, and when I caused lag (with heavy I/O) Flutter/Dart had tools in place for me to narrow down exactly what was causing it.

What I don't like about Flutter:

• It has poor mouse/trackpad support.
  Right clicks, not a thing. I can workaround this with a double-click/long-click, but for a desktop OS, this isn't optimal. Scrolling, that's panning, this should be differentiated. There's a difference between using a scrollwheel and moving finger around on the screen. According to Flutter there is not. There's also currently no support for mouse hovers which I have needed very much.
  There is a pull-request for adding support for all of these, but the developer hasn't done anything since code review.
• Keyboard support, while there, is lackluster.
  Ctrl, Shift, Alt. These have to be gotten with the meta code. There's no built-in function for checking those. Text fields don't support the tab key to navigate. And text formatting (bold, italic, etc.) isn't possible with text fields without the use of a library (or making it yourself).

I was trying to think of a third dislike, but I can't. My complaints are on missing APIs for Chromebooks. That's it. I really like Flutter, I plan on using it more, and if they won't add support for mouse/keyboard, maybe I'll have to contribute.

I'd love to hear what your thoughts about it is.

Background:
I was deciding what to do since we use Atlassian’s Stride and it will be sunsetted. For us, the options are Teams or Slack. I’m going to give Teams a try since we already pay for it. Someone I know also happens to be a PM there. I texted him “wow, Teams iOS has a 4.7 rating in the App Store!” He said, yes, it’s probably our best client. It made me realize that this is very often the case. The iOS client is often the best client for many services.

Questions:
Do you all find this to be true as well?

If so, why do you think this is? iOS itself? iOS app guidelines? iOS devs are more product minded? Android device fragmentation?

Any and all thoughts appreciated.

note: I am mobile OS agnostic, I use them all (both) regularly.