Can't download Garmin Connect app for ios 12.5.4

Maybe they've recalled it? For me that version messed up all my widgets, rearranged and/or uninstalled them :-(

You need a phone with iOS 13 or higher.

In the meantime you can use Garmin Express or wifi to sync your data.

But in the requirements it says iOS 11!?!

Where?

Here it says iOS 13: https://support.garmin.com/en-GB/?faq=pvL8aWsaLU2iKyvF8VrpP9

Here is the Link to the German App Store (I'm from Germany):

https://apps.apple.com/de/app/garmin-connect/id583446403

I see. It is odd. Maybe they discovered some major issues with the old version so they took it down. 

I have the iOS app on my old iPad running 12.5.4 and Garmin Connect was working, as I was offered to install an older version of the app. However, with the latest version, it just hangs on the install and never finishes.

Just got done with a chat session with Garmin Support:

Garmin Support: that is due to the ios version of your ipad. Garmin Connect App Minimum Device Software Requirements unfortunately with all the ios updates, connect now only supports 13 or higher

My mistake was uninstalling my older working version and installing the new version in an attempt to troubleshoot your issue.